How Quickly Do Systematic Reviews Go Out of Date? A Survival Analysis

Appendix Figure 3. Ratio of new total sample size to old total sample size is >2, which occurred for 25% of systematic reviews in the cohort.
Appendix Figure 3. Ratio of new total sample size to old total sample size is >2, which occurred for 25% of systematic reviews in the cohort. Kaplan–Meier plot showing the effect on survival of increasing the total number of patients by more than a factor of 2.

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  1. Published online before print July 16, 2007, Ann Intern Med August 21, 2007 vol. 147 no. 4 224-233
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