Fig. 2From: Circulating retinol binding protein 4 levels in nonalcoholic fatty liver disease: a systematic review and meta-analysisMeta-analysis of circulating retinol binding protein 4 (RBP4) levels in nonalcoholic fatty liver disease (NAFLD) patients compared with controls (a), non-alcoholic steatohepatitis (NASH) patients compared with controls (b), simple steatosis (SS) patients compared with controls (c) and NASH patients compared with SS patients (d). SMD, standardized mean differences; CI, confidence intervalBack to article page