Abstract
Mediterranean diet (MedDiet) is central to MASLD management, however evidence in non-Mediterranean populations is limited. This study examined the association between MedDiet adherence and MASLD, hospitalisation, and mortality in a non-Mediterranean population. This longitudinal study included 119,536 UK Biobank adults with at least one 24-hour dietary recall and available sociodemographic and clinical data. Diet quality was assessed using the Modified-Mediterranean Diet Score (M-MedDietScore). MASLD was determined by Fatty Liver Index (FLI) at baseline and by liver imaging in a subgroup. Hospitalisation and mortality data were obtained from linked records, with MASLD outcomes identified using ICD-10 codes. Binary logistic regression and Cox proportional hazard models estimated odds ratios (OR) for MASLD and hazard ratios (HR) for hospitalisation and mortality. Each five-unit increase in M-MedDietScore was associated with 19% lower OR of MASLD as identified by FLI and confirmed in the imaging sub-analysis in a multivariate adjusted Model 2. Higher adherence to the MedDiet was associated with lower HR of hospitalisation due to liver-related, cardiovascular disease (CVD), diabetes, respiratory and renal disease (all p < 0.05). During a median follow-up of 9.7 years, 5,552 deaths occurred. Higher MedDiet adherence was associated with lower HR of all-cause, CVD, and extrahepatic cancer mortality and lower all-cause mortality risk in those with MASLD (HR: 0.94, 95% CI: 0.90-0.98). Higher adherence to the MedDiet was associated with lower off of MASLD and with reduced MASLD-related hospitalisations and mortality and lower all-cause mortality in those with MASLD. These findings support the role of MedDiet in reducing hepatic and cardiovascular burden in non-Mediterranean population.</p>