Table 1.
K × 2 frequency table defined by cutoff value c for predictor z
| Propensity stratum |
Treatment group | |||
|---|---|---|---|---|
| 1 | 2 | … | K | |
| z ≤ c | n11 | n12 | … | n1K |
| z > c | n21 | n22 | … | n2K |
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