Baseline characteristics of participants of included studies.

The studies by woodman (2003), Skulas-Ray (2011) and Moertl (2011) include two intervention groups with different fish oil doses separately, and the study by Sanders (2011) includes three intervention groups with different fish oil doses. The studies by Hill (2007) and Wright (2008) each contain two comparisons with different fish oil treatment durations.BMI, body mass index; SBP, systolic blood pressure; DBP, diastolic blood pressure; TG, triglyceride; TC, total cholesterol; ACEI, angiotensin-converting enzyme inhibitor; ARB, angiotensin receptor blocker; FMD, flow-mediated dilation; T2DM, type 2 diabetes mellitus; PAD, peripheral artery disease; SLE, systemic lupus erythematosus; HIV, human immunodeficiency virus; AMI, acute myocardial infarction; PCI, percutaneous coronary intervention; CHF, chronic heart failure; NR, not reported.