Interpersonal factors in brief treatment of depression: Further analyses of the National Institute of Mental Health Treatment of Depression Collaborative Research Program.

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Abstract
Previous analyses of data from the National Institute of Mental Health Treatment of Depression Collaborative Research Program indicate minimal differences in therapeutic outcome among 3 brief treatments for depression, but patients' pretreatment level of perfectionism had a significant negative relationship with residualized measures of clinical improvement. The present analyses indicate that the quality of the therapeutic relationship reported by patients early in treatment contributed significantly to the prediction of therapeutic change. The quality of the therapeutic relationship was only marginally predictive of therapeutic gain at low and high levels of perfectionism, but significantly predicted therapeutic gain at moderate levels of perfectionism. These findings suggest that the extensive efforts to compare different manual-directed treatments need to be balanced by commensurate attention to interpersonal dimensions of the therapeutic process.