a favorable trendP < 0.001
In the stratified analysis of study design, a favorable trend still existed in non-RCTs, with an RR of 3.68 and 95% CI [2.34–5.79] ( P < 0.001, fixed-effects model).
In the stratified analysis of study design, a favorable trend still existed in non-RCTs, with an RR of 3.68 and 95% CI [2.34–5.79] ( P < 0.001, fixed-effects model).