Statistical power in parallel group point exposure studies with time-to-event outcomes: an empirical comparison of the performance of randomized controlled trials and the inverse probability of treatment weighting (IPTW) approach

Table 1 Relative bias in crude marginal hazard ratio

c-statistic	Minimum relative bias (%)	Median relative bias (%)	Maximum relative bias (%)
0.5	−0.7	0.4	0.6
0.6	1.9	2.7	2.9
0.7	−23.8	−20.4	−18.7
0.8	−47.4	−39.1	−35.1
0.9	−75.6	−59.6	−51.6

ISSN: 1471-2288