| No overdispersion | Moderate overdispersion | High overdispersion | |||
---|---|---|---|---|---|---|
RaRa = 0.71 | RaRa = 0.70 | RaRa = 0.70 | ||||
 | Mean differenceb | SD | Mean difference | SD | Mean difference | SD |
Dichotomise RR | 0.29 | 0.06 | 0.30 | 0.07 | 0.30 | 0.07 |
Poisson RaR | 0.01 | 0.02 | 0.01 | 0.03 | 0.01 | 0.03 |
Simple RaR | 0.01 | 0.02 | 0.01 | 0.03 | 0.01 | 0.03 |
Time to the first event HR | 0.28 | 0.14 | 0.29 | 0.14 | 0.30 | 0.15 |
Marginal model HR | 0.03 | 0.10 | 0.04 | 0.10 | 0.04 | 0.10 |
Andersen-Gill HR | −0.07 | 0.09 | −0.05 | 0.10 | −0.05 | 0.10 |
Ratio of means | 0.01 | 0.04 | 0.01 | 0.05 | 0.01 | 0.05 |
Ratio of medians | 0.01 | 0.06 | 0.02 | 0.07 | 0.01 | 0.06 |