Table 2.
Change in drinking over time, weeks 0 – 8, intention to treat sample (N = 68)
| Treatment condition ndf = 2 |
Week by condition ndf = 2 |
Treatment week ndf = 1 |
Contrast 1 by Week ndf = 1 |
Contrast 2 by Week ndf = 1 |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| F | ddf | p | F | ddf | p | F | ddf | p | t | ddf | p | d* | t | ddf | p | d* | |
|
All data collected (observations = 606)
| |||||||||||||||||
| PDA | 2.14 | 87.62 | .12 | 5.93 | 535.93 | <.01 | 10.28 | 535.95 | <.01 | −0.50 | 535.08 | .62 | .13 | 2.68 | 536.36 | .01 | .71 |
| PHDD | 0.28 | 91.52 | .75 | 2.36 | 536.21 | .10 | 0.24 | 536.24 | .62 | 1.25 | 535.23 | .21 | .01 | −0.89 | 536.72 | .37 | .64 |
|
| |||||||||||||||||
|
Excluding data collected after withdrawal or last treatment contact (observations = 464)
| |||||||||||||||||
| PDA | 2.14 | 76.23 | .12 | 8.46 | 404.04 | <.01 | 38.32 | 404.52 | <.01 | −0.10 | 405.27 | .92 | .03 | 3.28 | 406.90 | .00 | .94 |
| PHDD | 0.47 | 78.18 | .62 | 3.24 | 405.38 | .04 | 11.58 | 405.94 | <.01 | 0.05 | 406.85 | .96 | .01 | −2.04 | 408.59 | .04 | .64 |
Note: PDA = Percentage of Days Abstinent; PHDD = Percentage of Heavy Drinking Days; Contrast 1 indicates effect for TAU versus CBT4CBT+monitoring; Contrast 2 indicates effect for TAU versus TAU+CBT4CBT;
*
Effect size for growth model analysis (Feingold, 2009)