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Effect of steroids on proteinuria in patients with IgA nephropathy. Boxes and horizontal lines represent mean difference and 95% CI, respectively, for each trial. Size of boxes is proportional to weight of that trial result. Diamonds represent the 95% CI for pooled estimates of the effect and centered on pooled mean difference. Dotted line on the center of the diamond represents pooled mean difference. Solid line represents that the mean difference is 0. IV, inverse variance.
