N
| |
OR(a) = 1.5, OR(b) = 1.5
|
OR(a) = 2.5, OR(b) =1.5
|
OR(a) = 1.5, OR(b) = 2.5
|
OR(a) = 2.5, OR(b) = 2.5
|
---|
| |
PSm
|
IPTW
|
PSm
|
IPTW
|
PSm
|
IPTW
|
PSm
|
IPTW
|
---|
40
|
Type I error
|
0.055
|
0.048
|
0.053
|
0.056
|
0.052
|
0.039
|
0.052
|
0.047
|
|
Bias
|
0.05
|
0.057
|
0.049
|
0.07
|
0.059
|
0.055
|
0.048
|
0.079
|
|
%
|
5.6
|
6.5
|
5.4
|
7.8
|
7.1
|
6.6
|
5.7
|
9.4
|
|
Variance
|
0.875
|
0.593
|
0.918
|
0.694
|
0.873
|
0.576
|
0.903
|
0.683
|
|
MSE
|
0.878
|
0.597
|
0.92
|
0.699
|
0.876
|
0.579
|
0.905
|
0.690
|
60
|
Type I error
|
0.045
|
0.046
|
0.047
|
0.046
|
0.044
|
0.039
|
0.044
|
0.039
|
|
Bias
|
0.058
|
0.036
|
0.058
|
0.049
|
0.048
|
0.022
|
0.05
|
0.033
|
|
%
|
6.4
|
4
|
6.4
|
5.4
|
5.7
|
2.6
|
6
|
3.9
|
|
Variance
|
0.511
|
0.36
|
0.553
|
0.414
|
0.484
|
0.329
|
0.516
|
0.388
|
|
MSE
|
0.514
|
0.362
|
0.556
|
0.416
|
0.486
|
0.33
|
0.519
|
0.389
|
100
|
Type I error
|
0.049
|
0.046
|
0.047
|
0.046
|
0.047
|
0.034
|
0.04
|
0.036
|
|
Bias
|
0.023
|
0.018
|
0.02
|
0.022
|
0.021
|
0.015
|
0.025
|
0.016
|
|
%
|
2.6
|
2
|
2.2
|
2.5
|
2.5
|
1.8
|
2.9
|
1.9
|
|
Variance
|
0.254
|
0.194
|
0.282
|
0.223
|
0.242
|
0.177
|
0.261
|
0.204
|
|
MSE
|
0.255
|
0.194
|
0.283
|
0.223
|
0.243
|
0.177
|
0.262
|
0.204
|
500
|
Type I error
|
0.049
|
0.046
|
0.05
|
0.048
|
0.041
|
0.038
|
0.042
|
0.037
|
|
Bias
|
0.01
|
0.007
|
0.012
|
0.008
|
0.01
|
0.005
|
0.013
|
0.005
|
|
%
|
1.1
|
0.8
|
1.3
|
0.9
|
1.2
|
0.6
|
1.5
|
0.6
|
|
Variance
|
0.04
|
0.034
|
0.045
|
0.038
|
0.037
|
0.032
|
0.042
|
0.035
|
|
MSE
|
0.04
|
0.034
|
0.045
|
0.038
|
0.037
|
0.032
|
0.042
|
0.035
|
- This table specially details the sample sizes ranging from 40 to 500. Prevalence of the treatment was set at 0.5. Conditional treatment effect was set at log(2.5) except for Type I errors estimations (log(1)). (N: number of subjects; PS: propensity score; IPTW: inverse probability of treatment weighting, OR(a) and OR(b): strengths of the association between baseline covariates and treatment or outcome respectively, as defined on an odds ratio scale).