From: Intermediate outcomes in randomized clinical trials: an introduction
 | Treatment assigned |  | Sample space of final outcome: preeclampsia | ||||||
---|---|---|---|---|---|---|---|---|---|
 | Control | Treatment |  |  | |||||
Principal strata | Treatment | Pregnant (0 = placebo; 1 = calcium) | Treament received (0 = no; 1 = yes) | Pregnant (0 = no; 1 = yes) | Labels | Assigned to control | Assigned treatment | Proportion in the stratum | (Average treatment assigned ) Effect |
1 | 0 | 0 | 0 | 0 | Never-takers never pregnant | * | * | p1 | * |
2 | 0 | 0 | 0 | 1 | Never-takers pregnant under treatment | * | (no, yes) | p2 | * |
3 | 0 | 0 | 1 | 0 | Compliers never-pregnant | * | * | p3 | * |
4 | 0 | 1 | 0 | 0 | Never-takers pregnant under control | (no, yes) | * | p4 | * |
5 | 1 | 0 | 0 | 0 | Defiers never-pregnant | * | * | 0 | * |
6 | 0 | 0 | 1 | 1 | Compliers pregnant under treatment | * | (no, yes) | p6 | * |
7 | 0 | 1 | 0 | 1 | Never-takers always-pregnant | (no, yes) | (no, yes) | p7 | 0 |
8 | 1 | 0 | 0 | 1 | Defiers pregnant under treatment | * | (no, yes) | 0 | * |
9 | 0 | 1 | 1 | 0 | Compliers pregnant under control | (no, yes) | * | p9 | * |
10 | 1 | 0 | 1 | 0 | Always-takers never-pregnant | * | * | p10 | * |
11 | 1 | 1 | 0 | 0 | Defiers pregnant under control | (no, yes) | * | 0 | * |
12 | 0 | 1 | 1 | 1 | Compliers always-pregnant | (no, yes) | (no, yes) | p12 | Ï„12 |
13 | 1 | 0 | 1 | 1 | Always-takers pregnant under treatment | * | (no, yes) | p13 | * |
14 | 1 | 1 | 0 | 1 | Defiers always-pregnant | (no, yes) | (no, yes) | 0 | Ï„14 |
15 | 1 | 1 | 1 | 0 | Always-takers pregnant under control | (no, yes) | * | p15 | * |
16 | 1 | 1 | 1 | 1 | Always-takers always-pregnant | (no, yes) | (no, yes) | p16 | 0 |