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Table 1 Relationship of four-week follow-up drinking with intervention condition and level of action for change intent after controlling for baseline drinking

From: Exploratory randomized controlled trial evaluating the impact of a waiting list control design

  Drinks per week Highest number AUDIT-Ca
Predictor ∆R2 β (95% C.I) ∆R2 β (95% C.I) ∆R2 β (95% C.I)
STEP 1 .32***   .45***   .19***  
Baseline drinking   0.46 (0.35 - 0.56)***   0.50 (0.41 - 0.59)***   0.59 (0.39 - 0.79)***
STEP 2 .05**   .01   .06**  
Conditionb   1.51 (-2.71 – 5.73)   0.45 (-0.84 – 1.74)   0.27 (-0.50 – 1.03)
Action subscale   -0.87 (-1.41 - -0.32)**   -0.12 (-0.29 – 0.44)   -1.65 (-0.26 - -0.06)***
STEP 3 .02*   .03**   .01  
Condition*Action   1.08 (0.00 - 2.16)*   0.48 (0.16 - 0.81)**   0.14 (-0.06 – 0.34)
  1. Note: *p ≤ .05. **p ≤ .01. ***p ≤ .001.
  2. aAUDIT-C is a composite measure that consists of respondents scores on frequency of drinking, drinks per drinking day, and frequency of five or more drinks on one occasion.
  3. bCondition: 0 = told in intervention condition; 1 = told in waiting list condition.