Table 1. Characteristics of the three included studies.

ALT: Alanine aminotransferase; ANP: Atrial natriuretic peptide; BMI: Body mass index; BP: Blood pressure; CAD: Coronary artery disease; COR: Crude odds ratio; ECG: Electrocardiogram; HF: Heart failure; hs-CRP: High sensitivity C- reactive protein; IHD: Ischemic heart disease; LVH: Left ventricular hypertrophy; NAFLD: Non-alcoholic fatty liver disease; VHD: Valvular heart disease.

Study	Population	Mean Age (NAFLD/No-NAFLD)	Males % (NAFLD/No-NAFLD)	NAFLD Assessment	AF Assessment	Outcome (AF/Total)	Mean Follow-up Time	Adjustment of Covariates	Result
Karajamaki AJ, 2015 Finland Prospective Cohort Study	Total; 958 NAFLD: 249 Non-NAFLD: 709	52±6/51±6	58/43	Hepatic ultrasonography by a radiologist with 10-year experience	Based on standard 12-lead resting ECG. (noted in medical records)	NAFLD: 37/249 Non-NAFLD: 56/709	16.3 years	Age, sex, diabetes mellitus, BMI, waist circumference, smoking, serum ALT, systolic BP, Left atrial diameter, ANP, CAD and hs-CRP	COR 1.96 (1.29-2.97)
Targher G, 2013 Italy Prospective Cohort Study	Total: 400 NAFLD: 281 Non-NAFLD: 119	63±9/64±9	59.4/57.1	Hepatic ultrasonography performed in all patients by an experienced radiologist, who was blind to the participants' details	Based on a standard 12-lead resting ECG. (noted in routine examination, or in medical records)	NAFLD: 38/281 Non-NAFLD: 4/119	10 years	Age, sex, hypertension, LVH status and PR interval	COR 4.49 (1.6-12.9)
Targher G, 2013 Italy Cross-Sectional Study	Total: 702 NAFLD: 514 Non-NAFLD: 188	65±13/68±14	55.6/49.5	Hepatic ultrasonography was performed in all patients by experienced radiologists, who were blinded to subjects' characteristics	Based on a standard 12-lead ECG done during hospital stay; or from medical history. (noted during hospital stay, or in medical records)	NAFLD: 75/514 Non-NAFLD: 10/188	-	Age, sex, diabetes duration, HbA1c, LVH status, IHD, VHD and HF	COR 3.04 (1.54-6.02)