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

Table 5 Standardised effect sizes by type of primary endpoint measure

Primary endpoint measure	Count	Standardised target effect size		Standardised observed effect size
Primary endpoint measure	Count	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

ISSN: 1745-6215