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Association of covariates with treatment and outcome where
| Strongly Associated With Treatment | Moderately Associated With Treatment | Independent of Treatment | |
|---|---|---|---|
| Strongly Associated With Outcome | x 1 | x 2 | x 3 |
| Moderately Associated With Outcome | x 4 | x 5 | x 6 |
| Independent of Outcome | x 7 | x 8 | x 9 |
