Figure 2From: Sodium bicarbonate-based hydration prevents contrast-induced nephropathy: a meta-analysis The Forest plot of odds ratios of contrast-induced nephropathy. Sizes of data markers are proportional to the weight of each study in the meta-analysis. Studies are stratified by year of presentation and/or publication. Horizontal bars, 95% confidence interval. NaHCO3 = sodium bicarbonate; NS = normal saline.Back to article page