Prevalence of nonalcoholic fatty liver disease in a Spanish town: a population-based study

Abstract

ObjectiveNonalcoholic fatty liver disease (NAFLD) is western countries’ most important cause of hepatic steatosis and hypertransaminasemia. The objective was to evaluate the prevalence of NAFLD among 261,025 people in the East Valladolid public healthcare area in Spain. MethodsWe randomly selected 1800 participants from a public healthcare system card database, representing most of the population. We performed a medical record, measurement of anthropometric parameters, abdominal ultrasound, and blood tests to rule out hepatic disease in all patients. We calculated the FLI score in all patients. Results448 participants agreed to participate in the study. The prevalence of nonalcoholic fatty liver disease in our study was 22.3% [18.5%–26.2%]. Prevalence was highest between 50 and 70 years, increasing with age (p < 0.006). There were no significant differences in sex (p = 0.338). The median Body mass index was 27.2, and NAFLD was related to the weight (p < 0,001) and abdominal perimeter (p < 0.001). Logistic regression analysis showed GGT lower than 26 UI/ml, body mass index higher than 31, and HOMA IR greater than 2.54 as independent factors to predict NAFLD in the sample. NAFLD diagnosis matched with an elevated FLI score in 88% of cases. ConclusionAccording to other epidemiological studies, NAFLD’s prevalence is very high. A complete study with a clinical consultation, image studies, and blood tests in all patients allows us to assess the prevalence of NAFLD in the population.