Research by March et al. (2007) examined 327 adolescents with a diagnosis of depression and looked at the effectiveness of CBT, antidepressants and a combination of CBT plus antidepressants.
After 36 weeks, 81% of the antidepressant group and 81% of the CBT group had significantly improved, demonstrating the effectiveness of CBT in treating depression.
However, 86% of the CBT plus antidepressant group had significantly improved, suggesting that a combination of both treatments may be more effective.