The sensitivity analysis was performed by omitting one study in each time to show statistically significant or marginally significant results; the pooled RR varied from 0.93 (95% CI, 0.83–1.04) to 0.99 (95% CI, 0.86–1.13).
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The sensitivity analysis was performed by omitting one study in each time to show statistically significant or marginally significant results; the pooled RR varied from 0.93 (95% CI, 0.83–1.04) to 0.99 (95% CI, 0.86–1.13).