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. 2016 Apr 26;9:2447–2453. doi: 10.2147/OTT.S98577

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© 2016 Ren et al. This work is published and licensed by Dove Medical Press Limited

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A forest plot for overall survival.

Notes: The difference between the two groups was significant (HR =0.57; 95% CI =0.37, 0.89; P=0.000). However, there was great statistical heterogeneity (I²=74.5%, P=0.000). After sensitivity analysis, heterogeneity became acceptable (I²=7.0%) and the effect measure remained significant (HR =0.52; 95% CI =0.40, 0.66; P=0.000). “1” means after sensitivity analysis and “1+2” means before sensitivity analysis. Weights are from random effects analysis.

Abbreviations: HR, hazard ratio; CI, confidence interval.