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. Author manuscript; available in PMC: 2015 Jun 1.
Published in final edited form as: Psychiatr Serv. 2014 Jun 1;65(6):765–773. doi: 10.1176/appi.ps.201300216

Figure 1. Trajectories of Beck Depression Inventory Scores in PST-PC and DIET.

Figure 1

Participants in both PST-PC and DIET demonstrated similar improvement in depressive symptoms (BDI). Improvements were sustained over two years. There was a significant quadratic and linear time effects (F(1,1356)=75.91, p<.001 and F(1,1356)=159.57, p<.001 respectively), but no significant intervention or intervention by time effects (F(1,1356)=2.49, p>.114 and F(1,1356)=.46, p>0.496). When examining race as moderator, we observed baseline difference in blacks between interventions; thus, we ran the model co-varying for baseline score. We detected significant time effect (F(1,1115)=26.78, p<.001) for post-intervention through 2 years, but no significant race, race*intervention or race*time effects.