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Table 5 Standardised effect sizes by type of primary endpoint measure

From: A study of target effect sizes in randomised controlled trials published in the Health Technology Assessment journal

Primary endpoint measure Count Standardised target effect size Standardised observed effect size
Mean Median Mean Median
Overall
 Continuous 49 0.375 0.353 0.277 0.219
 Proportion 41 0.224 0.198 0.115 0.048
 Time to event 10 0.291 0.312 0.147 0.065
 Count 4 0.250 0.245 0.045 0.048
 Other 3 0.295 0.295 0.169 0.186
p < 0.05
 Continuous 22 0.403 0.406 0.420 0.396
 Proportion 11 0.234 0.258 0.285 0.312
 Time to event 1 0.212 0.212 0.273 0.273
 Count 1 0.114 0.114 0.070 0.070
 Other 0     
p > 0.05
 Continuous 27 0.352 0.347 0.156 0.156
 Proportion 30 0.220 0.192 0.052 0.027
 Time to event 9 0.300 0.316 0.133 0.051
 Count 3 0.296 0.377 0.036 0.035
 Other 3 0.295 0.295 0.169 0.186