Outcomes and summary effects related to persistent diarrhea observed in published meta-analyses.

M1, Bhutta et al 2000 [9]; M2, Lukacik et al 2008 [17].
OR, odds ratio; RR, relative risk; RH, relative hazards; WMD, weighted mean difference; RCT, Lumber of randomized control trials used; N, Number of subjects included in meta-analysis; ES, summary effect size, CI, confidence interval; d, days; % ↓, percentage reduction.
M1 reported Q statistic and degrees of freedom and the I2 statstic was derived using the formula I2 = (Q-df)/Q. *, statistically significant; ---, not mentioned and not estimable.