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Data and counterfactual outcomes for the 10 first patients with treatments (Tr) A and B
| Person | Treatment received (Tr) | Outcome Y observed | YTr=A | YTr=B |
| 1 | A | 0 | 0 | ? |
| 2 | B | 1 | ? | 1 |
| 3 | B | 0 | ? | 0 |
| 4 | A | 1 | 1 | ? |
| 5 | A | 0 | 0 | ? |
| 6 | A | 0 | 0 | ? |
| 7 | B | 1 | ? | 1 |
| 8 | B | 0 | ? | 0 |
| 9 | B | 0 | ? | 0 |
| 10 | B | 0 | ? | 0 |
The dichotomous outcome (relapse) is denoted with Y. The counterfactual outcomes are denoted with ‘?’.
