Fig. 3From: Effect of nitric oxide on postoperative acute kidney injury in patients who underwent cardiopulmonary bypass: a systematic review and meta-analysis with trial sequential analysisThe relative risk of postoperative AKI. a Forest plot of the risk of AKI irrespective of the AKI stage in included trials. b Forest plot of subgroup analysis by the timing of NO initiation. RR risk ratio, CI confidential interval, AKI acute kidney injury, NO nitric oxideBack to article page