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. Author manuscript; available in PMC: 2014 Sep 1.
Published in final edited form as: Psychol Addict Behav. 2012 Aug 20;27(3):754–762. doi: 10.1037/a0029639

Table 2.

Therapist MI process predictors in relation to client within treatment alcohol use

Fixed Effects (Level 2) PDA DDD
b t(df) p b t(df) p
Aftercare
  BL alcohol use −0.01 −0.19(316)   .849 −0.07 −1.17(316)   .243
  Time −0.06 −4.48(316) <.001   0.29   4.38(316) <.001
  Ambivalence −0.00 −0.78(316)    .44   0.04   1.31(316)    .19
  Commitment   0.02   2.30(316)    .02 −0.07 −1.90(316)    .06
  Assessment −0.01 −1.59(316)    .11   0.08   1.94(316)    .05
Interactions with time
  Ambivalence by time −0.01 −1.78(313)    .08   0.04   1.53(313)    .13
  Commitment by time   0.01   1.66(313)    .09 −0.05 −1.15(313)    .25
  Assessment by time −0.00 −0.29(313)    .77 −0.04 −0.80(313)    .42
Outpatient
  BL alcohol use   0.41   6.61(428) <.001   0.08   1.06(428)   .287
  Time −0.02 −1.92(428)    .06   0.31   5.44(428) <.001
  Ambivalence −0.01 −1.15(428)    .25   0.07   2.39(428)    .02
  Commitment   0.02   2.58(428)    .01 −0.10 −2.95(428)  <.01
  Assessment −0.01 −1.68(428)    .09   0.02   1.01(428)    .31
Interactions with time
  Ambivalence by time   0.01   1.19(425)    .23   0.00   0.08(425)    .93
  Commitment by time   0.00   0.33(425)    .76 −0.05 −1.18(425)    .24
  Assessment by time   0.00   0.40(425)    .68 −0.04 −0.93(425)    .35

Notes.

1

Effects significant at p ≤ .05 highlighted in bold font.

2

BL alcohol was measured by PDA and DDD.

3.

Outcome transformations maintain directionality and relative magnitude in interpreting coefficient estimates.