Figure 2
From: Do corticosteroids reduce the mortality of influenza A (H1N1) infection? A meta-analysis
Effect of corticosteroids on influenza A (H1N1) cases from case–control studies. Diamond, overall estimate from the meta-analysis; square, point estimate of the result of each study; horizontal line that runs through the square and the width of the diamond represents the CI. Red dot, high risk of bias; green dot, low risk of bias; A to I, see Additional file 1. CI, confidence interval; M-H, Mantel-Haenszel.