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    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Psoriatic arthritis is a chronic inflammatory disease included in the spectrum of psoriatic disease and its prognosis is conditioned by the evolution of the disease itself and the comorbidity that these patients present&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">Among the associated comorbidities&#44; non-alcoholic fatty liver disease &#40;NAFLD&#41; stands out for its prevalence&#46; It is the most common hepatic pathology in the world and is defined as the accumulation of lipids in hepatocytes leading to their death and an increase in inflammatory processes&#46; NAFLD is linked to the appearance of other comorbidities such as metabolic syndrome&#44; insulin resistance&#44; obesity and alterations in lipid metabolism&#46;<a class="elsevierStyleCrossRefs" href="#bib0005"><span class="elsevierStyleSup">1&#44;2</span></a></p><p id="par0015" class="elsevierStylePara elsevierViewall">Liver biopsy is the diagnostic test of certainty&#44; but due to its high prevalence&#44; invasiveness and high cost&#44; it is necessary to validate non-invasive techniques that can help predict patients at increased risk&#46; The acronym FIB-4 is a term that stands for FIBROSIS estimated with 4 simple elements&#46;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> It was proposed as a method to help determine the amount of fibrosis in the liver of patients with concomitant HIV and HCV infection&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">The primary objective was to describe the prevalence of NAFLD in patients with psoriatic arthritis&#44; secondly to find the correlation between FIB4 and ultrasound findings and finally to analyse the association of FIB4 with the clinical characteristics of the patients&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Material and methods</span><p id="par0025" class="elsevierStylePara elsevierViewall">A cross-sectional observational study was conducted in patients from a regional psoriatic arthritis registry &#40;SUEIRO registry&#41;&#44; successively and with prior acceptance from 01 January 2020 to 30 June 2022&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">Inclusion criteria included being &#62;18 years of age&#44; accepting to participate voluntarily&#44; having undergone an ultrasound scan and not presenting alcohol consumption or other causes of liver pathology &#40;metabolic&#44; viral&#41;&#46; The permitted alcohol consumption for men was &#60;28IU&#47;week and for women &#60;17IU&#47;week&#46; Exclusion criteria were therefore considered to be &#60;18 years of age&#44; not signing the informed consent form or presenting a cause of chronic liver disease&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">Patient characteristics assessed were age&#44; sex&#44; weight &#40;kg&#41;&#44; BMI &#40;kg&#47;m<span class="elsevierStyleSup">2</span>&#41;&#44; hypertension &#40;HT&#41;&#44; type 2 diabetes mellitus &#40;DM2&#41; and dyslipidaemia &#40;DL&#41;&#46; For disease data we considered the type of involvement &#40;axial&#44; peripheral and mixed&#41;&#44; extra-articular involvement &#40;skin and nail psoriasis&#44; uveitis&#44; inflammatory bowel disease&#44; enthesitis and dactylitis&#41;&#44; disease duration and remission&#46; Treatment received has included non-steroidal anti-inflammatory drugs&#44; corticosteroids&#44; leflunomide&#44; methotrexate and biologic drugs &#40;Infliximab&#44; Adalimumab&#44; Etanercept&#44; Golimumab&#44; Certolizumab&#44; Ustekinumab&#44; Secukinumab&#44; Ixekizumab&#41;&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The FIB4 index includes 4 variables&#58; age&#44; two liver enzymes called transaminases&#58; ALT and AST and platelet count and was performed using the specific calculator &#40;<a href="https://www.hepatitisc.uw.edu/page/clinical-calculators/fib-4">https&#58;&#47;&#47;www&#46;hepatitisc&#46;uw&#46;edu&#47;page&#47;clinical-calculators&#47;fib-4</a>&#41; categorising the results as &#60;1&#46;45 low risk&#58; 1&#46;45&#8211;3&#46;25 intermediate risk&#59; &#62;3&#46;25 high risk of advanced fibrosis&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">Statistical analysis was performed using SPSS v21&#46; Demographic variables were calculated using descriptive methods&#46; Categorical variables were expressed as absolute numbers and percentages&#44; while quantitative variables were expressed as arithmetic mean and standard deviation&#46; The association between variables was determined by bivariate analysis&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">For categorical variables&#44; the Chi-Square test was used&#44; and if not within its assumptions&#44; Fisher&#39;s Exact test was used&#46; For continuous variables&#44; the Student&#39;s <span class="elsevierStyleItalic">t</span>-test was used to compare means or&#44; if the variables did not conform to normality&#44; the Mann&#8211;Whitney <span class="elsevierStyleItalic">U</span> test&#44; Spearman&#39;s test was used to analyse the correlation between continuous variables&#44; and finally&#44; multiple linear regression analysis was carried out&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Results</span><p id="par0055" class="elsevierStylePara elsevierViewall">A total of 90 patients were analysed&#44; 51 patients had ultrasound abnormalities&#44; which in our sample represents a prevalence of NASH of 56&#46;67&#37;&#46; Among these ultrasonographic alterations&#44; we obtained 41 cases of steatosis &#40;45&#46;6&#37;&#41;&#44; 9 cases of steatohepatitis &#40;10&#37;&#41; and 1 case of cirrhosis &#40;1&#46;1&#37;&#41;&#46; <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a> shows the remaining epidemiological characteristics&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0060" class="elsevierStylePara elsevierViewall">A mean FIB4 of 1&#46;67 &#40;&#43;&#47;&#8722;1&#46;013&#41; was determined&#44; distributed as 52 of our patients &#40;57&#46;8&#37;&#41; had a low risk of fibrosis&#44; 30 &#40;33&#46;3&#37;&#41; a moderate risk and 8 of them &#40;8&#46;9&#37;&#41; a high risk of fibrosis&#46; In bivariate analysis&#44; FIB4 was associated with ultrasound &#40;p&#8239;&#61;&#8239;&#46;030&#41;&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">Regarding the association between FIB4 and the characteristics of our patients&#44; we found an association with the absence of enthesitis &#40;p&#8239;&#61;&#8239;&#46;036&#41; and longer disease duration &#40;Rho 0&#46;213 p&#8239;&#61;&#8239;&#46;042&#41;&#44; with higher FIB4 values in those patients with a higher number of enthesitis and longer disease duration&#46; Also&#44; with presence of hypertension&#44; &#40;p&#8239;&#61;&#8239;&#46;027&#41; and alcohol consumption&#44; &#40;p&#8239;&#61;&#8239;&#46;021&#41;&#46; As for biologic therapy&#44; those patients on biologic therapy had lower FIB4 levels &#40;p&#8239;&#61;&#8239;&#46;005&#41; and therefore this therapy could be considered a protective factor &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0070" class="elsevierStylePara elsevierViewall">No association was found between FIB4 and sex &#40;p&#8239;&#61;&#8239;&#46;106&#41;&#44; type of psoriatic arthritis involvement &#40;p&#8239;&#61;&#8239;&#46;633&#41;&#44; presence of psoriatic skin involvement &#40;p&#8239;&#61;&#8239;&#46;594&#41;&#44; uveitis &#40;p&#8239;&#61;&#8239;&#46;841&#41;&#44; dactylitis &#40;p&#8239;&#61;&#8239;&#46; 980&#41;&#44; onychopathy &#40;p&#8239;&#61;&#8239;&#46;847&#41;&#44; disease remission &#40;p&#8239;&#61;&#8239;&#46;881&#41;&#44; DAPSA &#40;Rho 0&#46;054&#44; p&#8239;&#61;&#8239;&#46;670&#41;&#44; methotrexate &#40;p&#8239;&#61;&#8239;&#46;974&#41;&#44; leflunomide &#40;p&#8239;&#61;&#8239;&#46;587&#41;&#44; BMI &#40;Rho 0&#46;010&#44; p&#8239;&#61;&#8239;&#46;931&#41;&#44; DL &#40;p&#8239;&#61;&#8239;&#46;259&#41; and DM2 &#40;p&#8239;&#61;&#8239;&#46;089&#41;&#46; Stratification by BMI score showed that 11&#46;4&#37; of patients had a BMI&#8239;&#60;&#8239;25&#59; 34&#46;2&#37; had a BMI between 25&#8211;30&#59; and 54&#46;4&#37; of patients had a BMI&#8239;&#62;&#8239;30&#44; which was not significant &#40;p&#8239;&#61;&#8239;&#46;850&#41;&#46; The mean BMI in patients with steatosis was 31&#46;4&#8239;&#177;&#8239;5&#46;35 and in patients with steatohepatitis 33&#46;20&#8239;&#177;&#8239;6&#46;4&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">FIB4 acts as a predictor of NAFLD with a sensitivity of 69&#46;2&#37; and specificity of 70&#46;4&#37; with an area under the curve of 0&#46;758 &#40;95&#37; CI 0&#46;619&#8722;0&#46;897&#41; &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41;&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0080" class="elsevierStylePara elsevierViewall">A multiple linear regression analysis was performed including the variables biological treatment &#40;including the different biological treatments&#41; and the other therapies&#44; HTN&#44; ultrasound findings&#44; enthesitis and DM2&#46;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> In this study we found no significant association between these variables and the FIB result&#46; In our study MTX had a p&#8239;&#61;&#8239;&#46;407&#59; and LFN p&#8239;&#61;&#8239;&#46;886&#46;</p><p id="par0085" class="elsevierStylePara elsevierViewall">Binary regression analysis showed an association between steatohepatitis and FIB4 with a p&#8239;&#61;&#8239;&#46;044 and an OR of 2&#46;517 &#40;95&#37;CI 1&#46;023&#8211;6&#46;190&#41;&#44; independent of the presence of obesity &#40;p&#8239;&#61;&#8239;&#46;224&#41;&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Discussion</span><p id="par0090" class="elsevierStylePara elsevierViewall">Identification of individuals with PsA and liver comorbidity is essential&#44; especially considering the prevalence and associated morbidity and mortality&#46; The prevalence of NASH in patients with psoriatic arthritis is higher than in the general population&#44; varying according to demographic factors and influenced by independent factors such as joint and skin disease activity&#44; ranging from 32&#37; to 44&#37;&#44; higher in our sample&#46;<a class="elsevierStyleCrossRefs" href="#bib0020"><span class="elsevierStyleSup">4&#44;5</span></a></p><p id="par0095" class="elsevierStylePara elsevierViewall">The FIB4 index is a non-invasive index easily accessible in daily clinical practice with a high negative predictive value and a sensitivity of almost 90&#37;&#46; Like FIB4&#44; the use of these non-invasive methods to assess the risk of liver fibrosis is becoming increasingly widespread&#44; but there are no protocols for their use in inflammatory arthritis&#44; although their study and active search is increasing&#46;<a class="elsevierStyleCrossRefs" href="#bib0030"><span class="elsevierStyleSup">6&#8211;8</span></a> The FIB4 results obtained in this study are associated with ultrasound findings and show that almost half of the patients analysed have a moderate&#47;high risk of liver fibrosis&#46; Among the intrinsic factors of the disease&#44; we found an association with the absence of enthesitis and the duration of the disease&#44; and biologic therapy as a protector&#46; Extrinsic factors include high blood pressure&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">Several studies indicate that the presence of hypertension or pre-hypertension causes a higher probability of NAFLD compared to normotensive patients&#44; even in the absence of other metabolic risk factors&#46; Furthermore&#44; the development of HTN is associated with the progression of NAFLD&#46;<a class="elsevierStyleCrossRef" href="#bib0045"><span class="elsevierStyleSup">9</span></a></p><p id="par0105" class="elsevierStylePara elsevierViewall">Perhaps because we were dealing with a population sample with a high percentage of overweight and obesity&#44; we were unable to find an association between BMI and the FIB index4&#46; However&#44; the association between BMI and NAFLD is well correlated in the literature&#46;<a class="elsevierStyleCrossRefs" href="#bib0050"><span class="elsevierStyleSup">10&#8211;12</span></a> The relationship between diabetes mellitus and NAFLD is widely known&#44; with some studies estimating the prevalence of fatty infiltration in 62&#46;2&#37; of patients with DM2 as measured by ultrasound&#46; However&#44; regarding the use of non-invasive methods&#44; one study has found lower accuracy in Hepascore&#44; FIB4 and APRI in diabetic versus non-diabetic patients&#46;<a class="elsevierStyleCrossRef" href="#bib0065"><span class="elsevierStyleSup">13</span></a></p><p id="par0110" class="elsevierStylePara elsevierViewall">In our study&#44; patients on biologic therapy showed a benefit in relation to FIB4 and liver fibrosis risk prediction&#46; TNFa inhibitors&#44; although early studies pointed to a potential effect on inflammation in the liver&#44; the benefits are still unclear&#44; although disease control may influence the hepatic benefit&#46;<a class="elsevierStyleCrossRefs" href="#bib0070"><span class="elsevierStyleSup">14&#44;15</span></a> Regarding IL12&#47;23 blockade&#44; the data in the literature are consistent with pivotal trials of the drug&#46; The influence of the IL-17 pathway in the aetiopathogenesis of NAFLD is a field under study&#44; and although blockade of this signalling pathway is a possible target&#44; translated into benefit with therapies that block it&#44; prospective studies with well-defined objectives are necessary to obtain conclusive results&#46;</p><p id="par0115" class="elsevierStylePara elsevierViewall">Prospective studies with a control group and a larger sample size could provide more evidence for the management of these patients in real clinical practice&#46;</p><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Limitations</span><p id="par0120" class="elsevierStylePara elsevierViewall">Observational and cross-sectional nature of the study&#46; Sample size&#46; Furthermore&#44; it would have been more appropriate to include a group of controls &#40;&#34;healthy&#34;&#41; matched by age&#44; sex and body mass index&#44; as these three factors will have a significant influence on the development of NAFLD and therefore the prevalence can be modified&#46; The absence of liver biopsy precludes a diagnosis of anatomopathological certainty&#46;</p></span></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Conclusions</span><p id="par0125" class="elsevierStylePara elsevierViewall">The prevalence of NAFLD in our series was 56&#46;67&#37;&#44; higher than in the standard population&#46; In our study&#44; using FIB4&#44; we found that almost half of the sample was at risk of fibrosis and this finding was associated with ultrasound findings&#46; The absence of enthesitis&#44; longer disease duration&#44; the presence of hypertension and alcohol consumption were associated with higher FIB4 values&#44; and biological treatment could be considered a protective factor&#46;</p><p id="par0130" class="elsevierStylePara elsevierViewall">The use of FIB4 can be a valid tool in screening for NAFLD&#44; being easily accessible and implementable in our daily clinical practice and with high diagnostic value&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Authors&#8217; contribution</span><p id="par0135" class="elsevierStylePara elsevierViewall">All the authors contributed equally in the research&#46;</p></span><span id="sec0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0100">Funding</span><p id="par0140" class="elsevierStylePara elsevierViewall">Janssen has offered support to make the registry viable and operational&#46;</p></span><span id="sec0045" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0105">Conflicts of interests and ethical aspects</span><p id="par0145" class="elsevierStylePara elsevierViewall">There are no conflicts of interest in this article&#46; The source registry with code 2015&#47;671 is approved by committee and patients signed informed consent for inclusion&#46;</p></span></span>"
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            1 => "Non-alcoholic fatty liver disease"
            2 => "NAFLD"
            3 => "Psoriasis"
            4 => "Psoriatic arthritis"
            5 => "Inflammation"
            6 => "Liver disease"
            7 => "Cirrhosis"
            8 => "Fibrosis"
            9 => "FIB4"
            10 => "Obesity"
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            1 => "Enfermedad por h&#237;gado graso no alcoh&#243;lico"
            2 => "EHGNA"
            3 => "Psoriasis"
            4 => "Artritis psori&#225;sica"
            5 => "Inflamaci&#243;n"
            6 => "Enfermedad hep&#225;tica"
            7 => "Cirrosis"
            8 => "Fibrosis"
            9 => "FIB4"
            10 => "Obesidad"
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        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Objectives</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">To describe the prevalence of non-alcoholic fatty liver disease &#40;NAFLD&#41;&#44; the association between FIB4 and ultrasound findings&#44; and the clinical characteristics of psoriatic arthritis patients&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Material and methods</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">We carried out an observational cross-sectional study of patients seen in the outpatient clinic from January 1st&#44; 2020&#44; to November 30th&#44; 2020&#44; with psoriatic arthritis&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Of the 90 patients studied&#44; the prevalence of NAFLD was 56&#46;67&#37;&#46; FIB4 presents an association with ultrasound findings &#40;p&#8239;&#61;&#8239;&#46;030&#41;&#44; the absence of enthesitis &#40;p&#8239;&#61;&#8239;&#46;036&#41;&#44; and longer duration of disease &#40;Rho &#46;213 p&#8239;&#61;&#8239;&#46;042&#41;&#46; It also presents an association with hypertension &#40;p&#8239;&#61;&#8239;&#46;027&#41; and alcohol consumption &#40;p&#8239;&#61;&#8239;&#46;021&#41;&#46; However&#44; biological treatment can be considered as a protective factor &#40;p&#8239;&#61;&#8239;&#46;005&#41;&#46; FIB4 acts as a NAFLD predictor with 69&#46;2&#37; sensitivity and 70&#46;4&#37; specificity&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusions</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">The prevalence of NAFLD was higher in our sample than in the standard population&#46; FIB4 index may be useful in screening for silent liver damage in psoriatic arthritis in clinical practice&#46;</p></span>"
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        "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Objetivos</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Describir la prevalencia de la enfermedad del h&#237;gado graso no alcoh&#243;lico &#40;EHGNA&#41;&#44; la asociaci&#243;n entre FIB4 y los hallazgos en la ecograf&#237;a y las caracter&#237;sticas cl&#237;nicas de los pacientes con artritis psori&#225;sica&#46;</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Material y m&#233;todos</span><p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Estudio transversal observacional de todos los pacientes con artritis psori&#225;sica vistos de forma consecutiva en consulta desde 01&#47;01&#47;2020 hasta el 30&#47;11&#47;2020&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">De los 90 pacientes estudiados la prevalencia de EHGNA fue de 56&#44;67&#37;&#46; EL FIB4 presenta asociaci&#243;n con la ecograf&#237;a &#40;p&#8239;&#61;&#8239;0&#46;030&#41;&#44; la ausencia de entesitis &#40;p&#8239;&#61;&#8239;0&#46;036&#41; y la mayor duraci&#243;n de la enfermedad &#40;Rho 0&#46;213 p&#8239;&#61;&#8239;0&#46;042&#41;&#46; Tambi&#233;n con la presencia de hipertensi&#243;n &#40;p&#8239;&#61;&#8239;0&#46;027&#41; y el consumo de alcohol &#40;p&#8239;&#61;&#8239;0&#46;021&#41;&#46; Sin embargo&#44; el tratamiento biol&#243;gico puede considerarse como un factor protector &#40;p&#8239;&#61;&#8239;0&#46;005&#41;&#46; El FIB4 act&#250;a como predictor de EHGNA con una sensibilidad 69&#46;2&#37; y especificidad 70&#46;4&#37;&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusiones</span><p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">La prevalencia de EHGNA fue superior a la poblaci&#243;n general&#46; El &#237;ndice FIB4 puede ser una herramienta v&#225;lida en el despistaje de EHGNA en nuestra pr&#225;ctica cl&#237;nica diaria&#46;</p></span>"
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                  \t\t\t\t" style="border-bottom: 2px solid black">Demographic variables&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">53 &#40;58&#44;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">23 &#40;25&#44;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">42 &#40;46&#44;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleItalic">Duration of the disease &#40;months&#41;</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">174&#44;7 &#40;&#43;&#47;&#8722;105&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">5 &#40;5&#44;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>Peripheral&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">69 &#40;76&#44;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>Mixed&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">16 &#40;17&#44;8&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">75 &#40;83&#44;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">15 &#40;16&#44;7&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">2 &#40;2&#44;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">29 &#40;43&#44;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">10 &#40;11&#44;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0 &#40;0&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">5 &#40;5&#44;2&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">18 &#40;20&#37;&#41; vs 72 &#40;80&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">41 &#40;45&#44;6&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleHsp" style=""></span>Cirrhosis&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">1 &#40;1&#44;1&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t"><span class="elsevierStyleItalic">FIB4</span>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">30 &#40;33&#44;3&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">8 &#40;8&#44;9&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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Journal Information
Vol. 19. Issue 9.
Pages 495-499 (November 2023)
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601
Vol. 19. Issue 9.
Pages 495-499 (November 2023)
Brief Report
Full text access
Liver fibrosis 4 score: Use in the evaluation of non-alcoholic fatty liver disease in patients with psoriatic arthritis
Índice de fibrosis hepática 4: uso en la evaluación de la enfermedad del hígado graso no alcohólico en pacientes con artritis psoriásica
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601
Carlota Iñiguez Ubiagaa, Carlos García Porrúaa,
Corresponding author
carlos.garcia.porrua@sergas.es

Corresponding author.
, José Antonio Pinto Tasendeb, Lorena Paula Iñiguez Ubiagac, Amalia Sánchez-Andrade Fernandeza
a Rheumatology Department, University Hospital Lucus Augusti, Lugo, Spain
b Rheumatology Department, University Hospital Complex of A Coruña, A Coruña, Spain
c Centro de Salud Monte Alto, University Hospital Complex of A Coruña, A Coruña, Spain
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Tables (2)
Table 1. Descriptive analysis of the demographic variables.
Table 2. Relationship between FIB4 and ultrasound and clinical characteristics of the patients. Bivariate analysis.
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Abstract
Objectives

To describe the prevalence of non-alcoholic fatty liver disease (NAFLD), the association between FIB4 and ultrasound findings, and the clinical characteristics of psoriatic arthritis patients.

Material and methods

We carried out an observational cross-sectional study of patients seen in the outpatient clinic from January 1st, 2020, to November 30th, 2020, with psoriatic arthritis.

Results

Of the 90 patients studied, the prevalence of NAFLD was 56.67%. FIB4 presents an association with ultrasound findings (p = .030), the absence of enthesitis (p = .036), and longer duration of disease (Rho .213 p = .042). It also presents an association with hypertension (p = .027) and alcohol consumption (p = .021). However, biological treatment can be considered as a protective factor (p = .005). FIB4 acts as a NAFLD predictor with 69.2% sensitivity and 70.4% specificity.

Conclusions

The prevalence of NAFLD was higher in our sample than in the standard population. FIB4 index may be useful in screening for silent liver damage in psoriatic arthritis in clinical practice.

Keywords:
Arthritis
Non-alcoholic fatty liver disease
NAFLD
Psoriasis
Psoriatic arthritis
Inflammation
Liver disease
Cirrhosis
Fibrosis
FIB4
Obesity
Treatment
Anti TNF alfa inhibitors
High blood pressure
Diabetes mellitus type 2
Resumen
Objetivos

Describir la prevalencia de la enfermedad del hígado graso no alcohólico (EHGNA), la asociación entre FIB4 y los hallazgos en la ecografía y las características clínicas de los pacientes con artritis psoriásica.

Material y métodos

Estudio transversal observacional de todos los pacientes con artritis psoriásica vistos de forma consecutiva en consulta desde 01/01/2020 hasta el 30/11/2020.

Resultados

De los 90 pacientes estudiados la prevalencia de EHGNA fue de 56,67%. EL FIB4 presenta asociación con la ecografía (p = 0.030), la ausencia de entesitis (p = 0.036) y la mayor duración de la enfermedad (Rho 0.213 p = 0.042). También con la presencia de hipertensión (p = 0.027) y el consumo de alcohol (p = 0.021). Sin embargo, el tratamiento biológico puede considerarse como un factor protector (p = 0.005). El FIB4 actúa como predictor de EHGNA con una sensibilidad 69.2% y especificidad 70.4%.

Conclusiones

La prevalencia de EHGNA fue superior a la población general. El índice FIB4 puede ser una herramienta válida en el despistaje de EHGNA en nuestra práctica clínica diaria.

Palabras clave:
Artritis
Enfermedad por hígado graso no alcohólico
EHGNA
Psoriasis
Artritis psoriásica
Inflamación
Enfermedad hepática
Cirrosis
Fibrosis
FIB4
Obesidad
Tratamiento
Inhibidores del anti-TNF
Hipertensión arterial
Diabetes mellitus tipo 2
Full Text
Introduction

Psoriatic arthritis is a chronic inflammatory disease included in the spectrum of psoriatic disease and its prognosis is conditioned by the evolution of the disease itself and the comorbidity that these patients present.

Among the associated comorbidities, non-alcoholic fatty liver disease (NAFLD) stands out for its prevalence. It is the most common hepatic pathology in the world and is defined as the accumulation of lipids in hepatocytes leading to their death and an increase in inflammatory processes. NAFLD is linked to the appearance of other comorbidities such as metabolic syndrome, insulin resistance, obesity and alterations in lipid metabolism.1,2

Liver biopsy is the diagnostic test of certainty, but due to its high prevalence, invasiveness and high cost, it is necessary to validate non-invasive techniques that can help predict patients at increased risk. The acronym FIB-4 is a term that stands for FIBROSIS estimated with 4 simple elements.3 It was proposed as a method to help determine the amount of fibrosis in the liver of patients with concomitant HIV and HCV infection.

The primary objective was to describe the prevalence of NAFLD in patients with psoriatic arthritis, secondly to find the correlation between FIB4 and ultrasound findings and finally to analyse the association of FIB4 with the clinical characteristics of the patients.

Material and methods

A cross-sectional observational study was conducted in patients from a regional psoriatic arthritis registry (SUEIRO registry), successively and with prior acceptance from 01 January 2020 to 30 June 2022.

Inclusion criteria included being >18 years of age, accepting to participate voluntarily, having undergone an ultrasound scan and not presenting alcohol consumption or other causes of liver pathology (metabolic, viral). The permitted alcohol consumption for men was <28IU/week and for women <17IU/week. Exclusion criteria were therefore considered to be <18 years of age, not signing the informed consent form or presenting a cause of chronic liver disease.

Patient characteristics assessed were age, sex, weight (kg), BMI (kg/m2), hypertension (HT), type 2 diabetes mellitus (DM2) and dyslipidaemia (DL). For disease data we considered the type of involvement (axial, peripheral and mixed), extra-articular involvement (skin and nail psoriasis, uveitis, inflammatory bowel disease, enthesitis and dactylitis), disease duration and remission. Treatment received has included non-steroidal anti-inflammatory drugs, corticosteroids, leflunomide, methotrexate and biologic drugs (Infliximab, Adalimumab, Etanercept, Golimumab, Certolizumab, Ustekinumab, Secukinumab, Ixekizumab).

The FIB4 index includes 4 variables: age, two liver enzymes called transaminases: ALT and AST and platelet count and was performed using the specific calculator (https://www.hepatitisc.uw.edu/page/clinical-calculators/fib-4) categorising the results as <1.45 low risk: 1.45–3.25 intermediate risk; >3.25 high risk of advanced fibrosis.

Statistical analysis was performed using SPSS v21. Demographic variables were calculated using descriptive methods. Categorical variables were expressed as absolute numbers and percentages, while quantitative variables were expressed as arithmetic mean and standard deviation. The association between variables was determined by bivariate analysis.

For categorical variables, the Chi-Square test was used, and if not within its assumptions, Fisher's Exact test was used. For continuous variables, the Student's t-test was used to compare means or, if the variables did not conform to normality, the Mann–Whitney U test, Spearman's test was used to analyse the correlation between continuous variables, and finally, multiple linear regression analysis was carried out.

Results

A total of 90 patients were analysed, 51 patients had ultrasound abnormalities, which in our sample represents a prevalence of NASH of 56.67%. Among these ultrasonographic alterations, we obtained 41 cases of steatosis (45.6%), 9 cases of steatohepatitis (10%) and 1 case of cirrhosis (1.1%). Table 1 shows the remaining epidemiological characteristics.

Table 1.

Descriptive analysis of the demographic variables.

Demographic variables  N = 90 
Sex (male vs female)  57 (63,3%) vs 33 (36,7%) 
Age (years)  62,55 +/− 13,4 
Weight (kg)  85,65 +/− 18,46 
BMI (kg/m231,18 +/− 5,4 
HBP  53 (58,9%) 
DM2  23 (25,6%) 
DL  42 (46,7%) 
Duration of the disease (months)  174,7 (+/−105) 
Type of APS condition   
Axial  5 (5,6%) 
Peripheral  69 (76,7%) 
Mixed  16 (17,8%) 
Psoriasis  75 (83,3%) 
Psoriatic onychopathy  15 (16,7%) 
Uveitis  2 (2,2%) 
Enthesitis  29 (43,3%) 
Dactylitis  10 (11,1%) 
Inflammatory bowel disease  0 (0%) 
Remission  18 (20%) 
DAPSA  10,13 (+/−7,17) 
BASDAI  5,1 (+/−1,94) 
Biological treatment  52 (57,8%) 
Methrotexate  38 (42,2%) 
Leflunomide  5 (5,2%) 
Alcohol consumption (yes vs no)  18 (20%) vs 72 (80%) 
Ultrasound   
Steatosis  41 (45,6%) 
Steatohepatitis  9 (10%) 
Cirrhosis  1 (1,1%) 
FIB4  1,67 (+/−1,013) 
Low risk of fibrosis  52 (57,8%) 
Moderate risk of fibrosis  30 (33,3%) 
High risk of fibrosis  8 (8,9%) 

A mean FIB4 of 1.67 (+/−1.013) was determined, distributed as 52 of our patients (57.8%) had a low risk of fibrosis, 30 (33.3%) a moderate risk and 8 of them (8.9%) a high risk of fibrosis. In bivariate analysis, FIB4 was associated with ultrasound (p = .030).

Regarding the association between FIB4 and the characteristics of our patients, we found an association with the absence of enthesitis (p = .036) and longer disease duration (Rho 0.213 p = .042), with higher FIB4 values in those patients with a higher number of enthesitis and longer disease duration. Also, with presence of hypertension, (p = .027) and alcohol consumption, (p = .021). As for biologic therapy, those patients on biologic therapy had lower FIB4 levels (p = .005) and therefore this therapy could be considered a protective factor (Table 2).

Table 2.

Relationship between FIB4 and ultrasound and clinical characteristics of the patients. Bivariate analysis.

  NAFLD ultrasound*  Absence of enthesitis*  Longer duration of illness**  Presence of HBP*  Consumption of alcohol*  No biological therapy* 
MAYOR FIB4  2.6 (1.3−3.6) vs 1.2 (.9−1.7), p = .003  1.4 (1.1−2.3) vs 1.2 (.8−1.7), p = .036  Rho 0.213 p = .042  1.5 (1.1−2.3) vs 1.2 (.9−1.4), p = .027  1.9 (1.2−3.5) vs 1.3 (.9−1.7), p = .021  1.7 (1.2−2.3) vs 1.1 (.9−1.7), p = .005 
*

Mann–Whitney U test of independent samples.

**

Spearman correlation test.

No association was found between FIB4 and sex (p = .106), type of psoriatic arthritis involvement (p = .633), presence of psoriatic skin involvement (p = .594), uveitis (p = .841), dactylitis (p = . 980), onychopathy (p = .847), disease remission (p = .881), DAPSA (Rho 0.054, p = .670), methotrexate (p = .974), leflunomide (p = .587), BMI (Rho 0.010, p = .931), DL (p = .259) and DM2 (p = .089). Stratification by BMI score showed that 11.4% of patients had a BMI < 25; 34.2% had a BMI between 25–30; and 54.4% of patients had a BMI > 30, which was not significant (p = .850). The mean BMI in patients with steatosis was 31.4 ± 5.35 and in patients with steatohepatitis 33.20 ± 6.4.

FIB4 acts as a predictor of NAFLD with a sensitivity of 69.2% and specificity of 70.4% with an area under the curve of 0.758 (95% CI 0.619−0.897) (Fig. 1).

Figure 1.

ROC curve analysis of the FIB4 index as a predictor of NAFLD in this psoriatic arthritis EHGNA.

(0.15MB).

A multiple linear regression analysis was performed including the variables biological treatment (including the different biological treatments) and the other therapies, HTN, ultrasound findings, enthesitis and DM2.4 In this study we found no significant association between these variables and the FIB result. In our study MTX had a p = .407; and LFN p = .886.

Binary regression analysis showed an association between steatohepatitis and FIB4 with a p = .044 and an OR of 2.517 (95%CI 1.023–6.190), independent of the presence of obesity (p = .224).

Discussion

Identification of individuals with PsA and liver comorbidity is essential, especially considering the prevalence and associated morbidity and mortality. The prevalence of NASH in patients with psoriatic arthritis is higher than in the general population, varying according to demographic factors and influenced by independent factors such as joint and skin disease activity, ranging from 32% to 44%, higher in our sample.4,5

The FIB4 index is a non-invasive index easily accessible in daily clinical practice with a high negative predictive value and a sensitivity of almost 90%. Like FIB4, the use of these non-invasive methods to assess the risk of liver fibrosis is becoming increasingly widespread, but there are no protocols for their use in inflammatory arthritis, although their study and active search is increasing.6–8 The FIB4 results obtained in this study are associated with ultrasound findings and show that almost half of the patients analysed have a moderate/high risk of liver fibrosis. Among the intrinsic factors of the disease, we found an association with the absence of enthesitis and the duration of the disease, and biologic therapy as a protector. Extrinsic factors include high blood pressure.

Several studies indicate that the presence of hypertension or pre-hypertension causes a higher probability of NAFLD compared to normotensive patients, even in the absence of other metabolic risk factors. Furthermore, the development of HTN is associated with the progression of NAFLD.9

Perhaps because we were dealing with a population sample with a high percentage of overweight and obesity, we were unable to find an association between BMI and the FIB index4. However, the association between BMI and NAFLD is well correlated in the literature.10–12 The relationship between diabetes mellitus and NAFLD is widely known, with some studies estimating the prevalence of fatty infiltration in 62.2% of patients with DM2 as measured by ultrasound. However, regarding the use of non-invasive methods, one study has found lower accuracy in Hepascore, FIB4 and APRI in diabetic versus non-diabetic patients.13

In our study, patients on biologic therapy showed a benefit in relation to FIB4 and liver fibrosis risk prediction. TNFa inhibitors, although early studies pointed to a potential effect on inflammation in the liver, the benefits are still unclear, although disease control may influence the hepatic benefit.14,15 Regarding IL12/23 blockade, the data in the literature are consistent with pivotal trials of the drug. The influence of the IL-17 pathway in the aetiopathogenesis of NAFLD is a field under study, and although blockade of this signalling pathway is a possible target, translated into benefit with therapies that block it, prospective studies with well-defined objectives are necessary to obtain conclusive results.

Prospective studies with a control group and a larger sample size could provide more evidence for the management of these patients in real clinical practice.

Limitations

Observational and cross-sectional nature of the study. Sample size. Furthermore, it would have been more appropriate to include a group of controls ("healthy") matched by age, sex and body mass index, as these three factors will have a significant influence on the development of NAFLD and therefore the prevalence can be modified. The absence of liver biopsy precludes a diagnosis of anatomopathological certainty.

Conclusions

The prevalence of NAFLD in our series was 56.67%, higher than in the standard population. In our study, using FIB4, we found that almost half of the sample was at risk of fibrosis and this finding was associated with ultrasound findings. The absence of enthesitis, longer disease duration, the presence of hypertension and alcohol consumption were associated with higher FIB4 values, and biological treatment could be considered a protective factor.

The use of FIB4 can be a valid tool in screening for NAFLD, being easily accessible and implementable in our daily clinical practice and with high diagnostic value.

Authors’ contribution

All the authors contributed equally in the research.

Funding

Janssen has offered support to make the registry viable and operational.

Conflicts of interests and ethical aspects

There are no conflicts of interest in this article. The source registry with code 2015/671 is approved by committee and patients signed informed consent for inclusion.

Acknowledgements

The authors with to thank the Grupo de Investigación Gallego en Artritis Psoriasica and the Sociedad Gallega de Reumatología for their advice and review of the article.

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