Table 4.
Results from moderated mediation analyses to examine whether baseline depression severity moderates the degree to which changes in depression mediate the effect of AA attendance on alcohol use outcomes at late follow-up (12, 18, 24 months; Fig. 2; Analysis 7, 8).
| PDA late with baseline depression severity moderator variable (n=194) | Coeff | SE | t | p |
|---|---|---|---|---|
| Path A (to BDI 18 months) | ||||
| BDI mod | 6.227 | 3.108 | 2.004 | 0.047 |
| BDI mod × AA 12 months | −15.811 | 7.644 | −2.068 | 0.040 |
| Path A (to PDA 18 months) | ||||
| BDI mod | −0.403 | 0.124 | −3.242 | 0.001 |
| BDI mod × AA 12 months | 0.712 | 0.284 | 2.507 | 0.013 |
| Path B (to PDA 24 months) | ||||
| BDI mod | 0.080 | 0.227 | 0.351 | 0.726 |
| BDI mod ×BDI 18 months | 0.001 | 0.006 | 0.209 | 0.835 |
| BDI mod × PDA 18 months | −0.055 | 0.139 | −0.396 | 0.692 |
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| Coeff | Boot SE | Boot LLCI | Boot ULCI | |
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| Indirect effect (BDI 18 months is mediator); minimal/mild sepression | 0.001 | 0.042 | −0.036 | 0.065 |
| Indirect effect (BDI 18 months is mediator); moderate/severe depression | −0.009 | 0.067 | −0.139 | 0.135 |
| Indirect effect (PDA 18 months is mediator); minimal/mild depression | 0.073 | 0.157 | −0.254 | 0.346 |
| Indirect effect (PDA 18 months is mediator); moderate/severe depression | 0.570 | 0.129 | 0.326 | 0.844 |
| Index of moderated mediation (BDI 18 months is mediator) | −0.009 | 0.072 | −0.155 | 0.132 |
| Index of moderated mediation (PDA 18 months is mediator) | 0.497 | 0.204 | 0.137 | 0.922 |
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| DPDD late with baseline depression severity moderator variable (n=183) | Coeff | SE | t | p |
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| Path A (to BDI 18 months) | ||||
| BDI mod | 6.157 | 3.115 | 1.977 | 0.050 |
| BDI mod ×AA 12 months | −15.868 | 7.628 | 2.080 | 0.039 |
| Path A (to DPDD 18 months) | ||||
| BDI mod | 0.447 | 0.475 | 0.942 | 0.602 |
| BDI mod × AA 12 months | −0.169 | 1.680 | −0.101 | 0.920 |
| Path B (to DPDD 24 months) | ||||
| BDI mod | 0.667 | 0.606 | 1.100 | 0.273 |
| BDI mod × BDI 18 months | 0.014 | 0.029 | 0.476 | 0.635 |
| BDI mod × DPDD 18 months | 0.117 | 0.192 | 0.610 | 0.542 |
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| Coeff | Boot SE | Boot LLCI | Boot ULCI | |
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| Indirect effect (BDI 18 months is mediator); minimal/mild depression | −0.0042 | 0.119 | −0.412 | 0.172 |
| Indirect effect (BDI 18 months is mediator); moderate/severe depression | 0.129 | 0.238 | −0.266 | 0.687 |
| Indirect effect (DPDD 18 months is mediator); minimal/mild depression | −1.094 | 0.758 | −2.806 | 0.156 |
| Indirect effect (DPDD 18 months is mediator); moderate/severe depression | −1.028 | 0.945 | −2.954 | 0.487 |
| Index of moderated mediation (BDI 18 months is mediator) | 0.133 | 0.262 | −0.301 | 0.733 |
| Index of moderated mediation (DPDD 18 months is mediator) | 0.066 | 1.180 | −2.282 | 2.389 |
BDI mod = Categorical BDI moderator variable, DPDD = drinks per drinking day, BDI = beck depression inventory, AA = AA attendance, Coeff = coefficient, SE = standard error, LLCI = lower level of confidence interval, ULCI = upper level of confidence interval; none of the paths for the analysis using percent days abstinent as the outcome were significant so these results are not reported in a table.
There were no significant interaction terms nor were the indices of moderated mediation significant for PDA or DPDD at early follow-up (Analyses 3,4) and so no table was created.