Figure 6. Funnel plots (with pseudo 95% CIs) of all the individual studies in the meta-analyses for the effects of fish oil supplementation on POAF incidence (A) and LOH after cardiac surgery (B).

POAF, postoperative atrial fibrillation; LOH, length of hospitalization; RR, risk ratio; WMD, weighed mean difference, SE, standard error; CI, confidence interval.