TABLE 2.
Bias, MSE, and 95% coverage probability of the proportional treatment effect of 20% (4‐year trial only) for marginal PcLDA
| Sample Size/Arm | No Dropout | 10% Annual Dropout | ||||
|---|---|---|---|---|---|---|
| Bias | MSE | CP | Bias | MSE | CP | |
| 200 | −0.0044 | 0.0109 | 94.3% | −0.0055 | 0.0152 | 94.5% |
| 300 | −0.0030 | 0.0067 | 94.8% | −0.0017 | 0.0095 | 93.9% |
| 400 | −0.0027 | 0.0054 | 94.3% | −0.0012 | 0.0074 | 94.5% |
Bias is the mean of the difference between the estimated parameter and its true value (1000 replicates). Abbreviations: CP, coverage probability of the corresponding 95% confidence interval; MSE, mean of the squared error; PcLDA, proportional constrained longitudinal data analysis model.