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True association between baseline covariates with treatment and outcome. Note, x1, x2, x4, and x5 are simulated to be pretreatment confounders.
| Strongly Associated with Treatment | Moderately Associated with Treatment | Independent of Treatment | |
|---|---|---|---|
| Strongly Associated with Outcome | x1 | x2 | x3 |
| Moderately Associated with Outcome | x4 | x5 | x6 |
| Independent of Outcome | x7 | x8 | x9 |
