| No overdispersion | Moderate overdispersion | High overdispersion | |||
---|---|---|---|---|---|---|
RaRa = 0.71 | RaRa = 0.73 | RaRa = 0.74 | ||||
 | Mean differenceb | SD | Mean difference | SD | Mean difference | SD |
Dichotomise RR | 0.05 | 0.08 | 0.05 | 0.08 | 0.06 | 0.08 |
Poisson RaR | <0.01 | 0.06 | <0.01 | 0.01 | <0.01 | 0.01 |
Simple RaR | <0.01 | 0.06 | <0.01 | 0.01 | <0.01 | 0.01 |
Time to the first event HR | 0.01 | 0.08 | 0.01 | 0.09 | 0.02 | 0.09 |
Marginal model HR | 0.01 | 0.08 | 0.01 | 0.08 | 0.01 | 0.08 |
Andersen-Gill HR | 0.01 | 0.08 | 0.01 | 0.08 | 0.01 | 0.08 |
Ratio of means | <0.01 | 0.03 | <0.01 | 0.03 | <0.01 | 0.03 |
Ratio of medians | Only possible for 292, 717 and 2087 of the 10,000 simulations, respectively |