Percentage of Participants with Mood-Related Disorders (MRDs) and Anxiety-Related Disorders (ARDs) at Baseline and at 6-month Follow-up. Ninety-five homeless, cocaine-dependent treatment trial participants were diagnostically assessed at baseline and at 6 months' follow-up for the presence of Mood-Related Disorders (MRDs) or Anxiety-Related Disorders (ARDs), using a clinical interview conducted by a trained psychologist. MRDs included disorders such as depression and bipolar disorder. ARDs included disorders such as post-traumatic stress disorder and generalized anxiety disorder (for details, see Methods). The figure depicts the prevalence of each disorder type (MRDs and ARDs) among this sample at baseline and 6 months. The 32% absolute decline in prevalence of non-addiction psychiatric disorders from baseline to 6 months corresponds to -26% change in a statistical model adjusting for disorder type, and accounting for multiple observations per person. (χ2 [df 1] = 30.49, p < 0.001). A test of whether the decline in MRD prevalence from 0 to 6 months differed from the decline for ARDs was nonsignificant, (χ2 [df 1] = 2.48, p = 0.12).