Table 4.
Characteristics of some baseline covariates in the ATBC dataset
| Covariate | Mean | Standard deviation |
|---|---|---|
| Age | 57.2 | 5.0 |
| Years smoked | 35.9 | 8.4 |
| Cigarettes/day | 20.4 | 8.8 |
| Alcohol (g/day) | 17.8 | 21.3 |
| Inhale (yes/no) | .53 | .50 |
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