Fig. 4From: Prevalence and mortality rate of abdominal surgical emergencies in Sub-Saharan Africa: a systematic review and meta-analysisFunnel plots for assessment of publication bias in the three study outcomes in the meta-analysis. A: Mortality (tau = 0.343; p < 0.001); B: Overall morbidity (tau = 0.350; p < 0.001); C: Surgical site infection (tau = 0.461; p < 0.001).Back to article page