Nicola Wiles, Ph.D., from the University of Bristol in the United Kingdom, and colleagues randomized 469 patients aged 18 to 75 years with treatment resistant depression (defined as on antidepressants for at least six weeks; Beck depression inventory [BDI] score of at least 14; and international classification of diseases [ICD]-10 criteria for depression) to either usual care (235 participants) or CBT plus usual care (234 participants).
The researchers found that, at six months, significantly more participants in the intervention group met the criteria for response (at least 50 percent reduction in depressive symptoms [BDI score] compared with baseline), compared to the participants in the usual-care group (46 versus 22 percent; odds ratio, 3.26).
Abstract
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