Table 2.
Top three candidates for splitting the root node of the tree predicting no heavy drinking during the last eight weeks of treatment in the training sample in COMBINE.
| Predictor | Categories | Number in category | Percent without heavy drinking | Statistical Criteria (Log worth) |
|---|---|---|---|---|
| CDA before treatment | >14 days | 120 | 70% | 10.35 |
| <=14 days | 689 | 38% | ||
| Age | >45 years | 373 | 54% | 8.38 |
| <=45 years | 436 | 34% | ||
| Drinking goal | Complete abstinence or missinga | 318 | 54% | 5.62 |
| Othersb | 491 | 35% |
a
Complete Abstinence: “I want to quit using alcohol once and for all, to be totally abstinent, and never use alcohol ever again for the rest of my life”
b
Others: this grouping contains all of the other responses including: 1) no goal; 2) controlled use;3) abstinence but may drink later; 4) occasional use; 5) want to quit but realize might slip.