showed a trendP = 0.01
Both cohort studies and trials showed a trend toward mortality reduction (overall relative risk: 0.62, 95% confidence interval: 0.43–0.91, P = 0.01).
Both cohort studies and trials showed a trend toward mortality reduction (overall relative risk: 0.62, 95% confidence interval: 0.43–0.91, P = 0.01).