Table 2.
Poisson regression model with estimation via generalized estimating equations (GEE) to investigate the relationship between frequency of affiliative statements categorized in quintiles and the trajectory of days of any substance use during treatment (months 1–3) and post-treatment (months 4–9).
| Treatment Phase | Post-treatment Phase | |||
|---|---|---|---|---|
| Model 1 | Model 2 | Model 1 | Model 2 | |
| Estimate (S.E.) | Estimate (S.E.) | Estimate (S.E.) | Estimate (S.E.) | |
| Intercept | 0.334 (0.637) |
0.573 (0.605) |
1.404** (0.431) |
1.202* (0.497) |
| time | 0.323* (0.150) |
0.186 (0.137) |
0.005 (0.024) |
0.015 (0.037) |
| Affiliation (26,41] | 0.526 (0.721) |
0.934 (0.744) |
−0.589 (0.596) |
−0.481 (0.571) |
| Affiliation (41,50] | 0.639 (0.738) |
1.735 (1.074) |
−0.049 (1.007) |
0.787 (1.251) |
| Affiliation (50,65] | 0.015 (0.786) |
0.344 (1.042) |
−0.502 (0.941) |
0.301 (1.481) |
| Affiliation (65,122] | 0.669 (0.667) |
1.645* (0.755) |
−1.524* (0.736) |
−4.548** (0.959) |
| WRG | 0.293 (0.398) |
−0.456 (0.841) |
0.328 (0.424) |
1.333 (0.706) |
| High Self-Efficacy | 0.021 (0.019) |
−0.178 (0.383) |
0.021 (0.022) |
−0.768 (0.420) |
| Baseline days of substance use | −0.275 (0.382) |
0.019 (0.019) |
−0.719 (0.416) |
0.013 (0.017) |
| time x Affiliation (26,41] | −0.226 (0.198) |
−0.269 (0.181) |
0.033 (0.085) |
0.077 (0.104) |
| time x Affiliation (41,50] | −0.297 (0.310) |
−1.168** (0.420) |
−0.021 (0.109) |
−0.010 (0.132) |
| time x Affiliation (50,65] | −0.101 (0.206) |
−0.212 (0.143) |
0.082 (0.103) |
0.023 (0.163) |
| time x Affiliation (65,122] | −0.583* (0.246) |
−1.023** (0.247) |
0.069 (0.073) |
0.429** (0.063) |
| time x WRG | 0.468** (0.138) |
−0.022 (0.046) |
||
| WRG x Affiliation (26,41] | −1.392 (1.173) |
−0.511 (0.983) |
||
| WRG x Affiliation (41,50] | −1.046 (1.342) |
−1.897 (1.917) |
||
| WRG x Affiliation (50,65] | −0.120 (1.442) |
−1.677 (1.763) |
||
| WRG x Affiliation (65,122] | −1.029 (1.098) |
2.853* (1.219) |
||
| time x WRG x Affiliation (26,41] | 0.202 (0.345) |
−0.077 (0.151) |
||
| time x WRG x Affiliation (41,50] | 0.844 (0.466) |
−0.038 (0.241) |
||
| time x WRG x Affiliation (50,65] | −0.087 (0.227) |
0.105 (0.203) |
||
| time x WRG x Affiliation (65,122] | 0.307 (0.309) |
−0.398** (0.113) |
||
*
p-value<0.05;
**
p-value<0.01.
Model 1 Main effect model; Model 2 interaction model between affiliative statements and WRG. Both models adjust for baseline days of any substance use and self efficacy.