A comparative outcome study of individual, group, and conjoint psychotherapy.

Sixty-four outpatients were assigned to individual, group, or conjoint psychotherapy with experienced private clinicians. The length of the treatments ("cognitive insight" or "affective insight" therapies) averaged 26.8 sessions. To examine comparative outcomes, patients and significant others were assessed on both general outcome measures (eg, symptoms, target complaints) and mode-specific indexes (eg, private self-awareness, interpersonal functioning, and family environment). The most notable finding was the significant improvement of the sample as a whole at both termination and follow-up (average, 31 weeks). When differential outcomes did appear, they were more often attributable to differences among therapists and to interactive effects (ie, a particular fit between specific patient characteristics and a specific mode of therapy) than to main effects for any single therapy. The findings also demonstrated the importance of a systems approach to understanding fully the effects of psychotherapy because the patient's view of the family, the significant other's view of the patient, and the significant other's own adjustment tended to vary together, regardless of the mode of treatment.

Some conceptual and statistical issues in analysis of longitudinal psychiatric data. Application to the NIMH treatment of Depression Collaborative Research Program dataset.

Longitudinal studies have a prominent role in psychiatric research; however, statistical methods for analyzing these data are rarely commensurate with the effort involved in their acquisition. Frequently the majority of data are discarded and a simple end-point analysis is performed. In other cases, so called repeated-measures analysis of variance procedures are used with little regard to their restrictive and often unrealistic assumptions and the effect of missing data on the statistical properties of their estimates. We explored the unique features of longitudinal psychiatric data from both statistical and conceptual perspectives. We used a family of statistical models termed random regression models that provide a more realistic approach to analysis of longitudinal psychiatric data. Random regression models provide solutions to commonly observed problems of missing data, serial correlation, time-varying covariates, and irregular measurement occasions, and they accommodate systematic person-specific deviations from the average time trend. Properties of these models were compared with traditional approaches at a conceptual level. The approach was then illustrated in a new analysis of the National Institute of Mental Health Treatment of Depression Collaborative Research Program dataset, which investigated two forms of psychotherapy, pharmacotherapy with clinical management, and a placebo with clinical management control. Results indicated that both person-specific effects and serial correlation play major roles in the longitudinal psychiatric response process. Ignoring either of these effects produces misleading estimates of uncertainty that form the basis of statistical tests of hypotheses.

Course of depressive symptoms over follow-up. Findings from the National Institute of Mental Health Treatment of Depression Collaborative Research Program.

We studied the course of depressive symptoms during an 18-month naturalistic follow-up period for outpatients with Major Depressive Disorder treated in the National Institute of Mental Health Treatment of Depression Collaborative Research Program. The treatment phase consisted of 16 weeks of randomly assigned treatment with the following: cognitive behavior therapy, interpersonal therapy, imipramine hydrochloride plus clinical management (CM), or placebo plus CM. Follow-up assessments were conducted at 6, 12, and 18 months after treatment. Of all patients entering treatment and having follow-up data, the percent who recovered (8 weeks of minimal or no symptoms following the end of treatment) and remained well during follow-up (no Major Depressive Disorder relapse) did not differ significantly among the four treatments: 30% (14/46) for those in the cognitive behavior therapy group, 26% (14/53) for those in the interpersonal therapy group, 19% (9/48) for those in the imipramine plus CM group, and 20% (10/51) for those in the placebo plus CM group. Among patients who had recovered, rates of Major Depressive Disorder relapse were 36% (8/22) for those in the cognitive behavior therapy group, 33% (7/21) for those in the interpersonal therapy group, 50% (9/18) for those in the imipramine plus CM group, and 33% (5/15) for those in the placebo plus CM group. The major finding of this study is that 16 weeks of these specific forms of treatment is insufficient for most patients to achieve full recovery and lasting remission. Future research should be directed at improving success rates of initial and maintenance treatments for depression.

National Institute of Mental Health Treatment of Depression Collaborative Research Program. General effectiveness of treatments.

We investigated the effectiveness of two brief psychotherapies, interpersonal psychotherapy and cognitive behavior therapy, for the treatment of outpatients with major depression disorder diagnosed by Research Diagnostic Criteria. Two hundred fifty patients were randomly assigned to one of four 16-week treatment conditions: interpersonal psychotherapy, cognitive behavior therapy, imipramine hydrochloride plus clinical management (as a standard reference treatment), and placebo plus clinical management. Patients in all treatments showed significant reduction in depressive symptoms and improvement in functioning over the course of treatment. There was a consistent ordering of treatments at termination, with imipramine plus clinical management generally doing best, placebo plus clinical management worst, and the two psychotherapies in between but generally closer to imipramine plus clinical management. In analyses carried out on the total samples without regard to initial severity of illness (the primary analyses), there was no evidence of greater effectiveness of one of the psychotherapies as compared with the other and no evidence that either of the psychotherapies was significantly less effective than the standard reference treatment, imipramine plus clinical management. Comparing each of the psychotherapies with the placebo plus clinical management condition, there was limited evidence of the specific effectiveness of interpersonal psychotherapy and none for cognitive behavior therapy. Superior recovery rates were found for both interpersonal psychotherapy and imipramine plus clinical management, as compared with placebo plus clinical management. On mean scores, however, there were few significant differences in effectiveness among the four treatments in the primary analyses. Secondary analyses, in which patients were dichotomized on initial level of severity of depressive symptoms and impairment of functioning, helped to explain the relative lack of significant findings in the primary analyses. Significant differences among treatments were present only for the subgroup of patients who were more severely depressed and functionally impaired; here, there was some evidence of the effectiveness of interpersonal psychotherapy with these patients and strong evidence of the effectiveness of imipramine plus clinical management. In contrast, there were no significant differences among treatments, including placebo plus clinical management, for the less severely depressed and functionally impaired patients.

Treating major depression in primary care practice. Eight-month clinical outcomes.

BACKGROUND: We studied whether standardized treatments of major depression whose efficacy was established with psychiatric patients are equally effective when provided to primary care patients, and whether standardized treatments are more effective than a primary care physician's usual care. METHODS: A randomized controlled trial was conducted, in which primary care patients meeting DSM-III-R criteria for a current major depression were assigned to nortriptyline (n = 91) or interpersonal psychotherapy (n = 93) provided within well-structured parameters, or a physician's usual care (n = 92). The main outcome measures were degree and rate of improvement in severity of depressive symptoms and proportion of patients recovered at 8 months. RESULTS: Severity of depressive symptoms was reduced more rapidly and more effectively among patients randomized to pharmacotherapy or psychotherapy than among patients assigned to a physician's usual care. Among treatment completers, approximately 70% of patients participating in the full pharmacotherapy or psychotherapy protocol but only 20% of usual care patients were judged as recovered at 8 months. CONCLUSIONS: Pharmacotherapy and psychotherapy effectively treat major depression among primary care patients when provided within specific parameters and for the full acute and continuation phases. Treatment principles recommended by the Depression Guideline Panel of the Agency for Health Care Policy and Research are supported.

Patient predictors of response to psychotherapy and pharmacotherapy: findings in the NIMH Treatment of Depression Collaborative Research Program.

OBJECTIVE: The authors investigated patient characteristics predictive of treatment response in the National Institute of Mental Health (NIMH) Treatment of Depression Collaborative Research Program. METHOD: Two hundred thirty-nine outpatients with major depressive disorder according to the Research Diagnostic Criteria entered a 16-week multicenter clinical trial and were randomly assigned to interpersonal psychotherapy, cognitive-behavior therapy, imipramine with clinical management, or placebo with clinical management. Pretreatment sociodemographic features, diagnosis, course of illness, function, personality, and symptoms were studied to identify patient predictors of depression severity (measured with the Hamilton Rating Scale for Depression) and complete response (measured with the Hamilton scale and the Beck Depression Inventory). RESULTS: One hundred sixty-two patients completed the entire 16-week trial. Six patient characteristics, in addition to depression severity previously reported, predicted outcome across all treatments: social dysfunction, cognitive dysfunction, expectation of improvement, endogenous depression, double depression, and duration of current episode. Significant patient predictors of differential treatment outcome were identified. 1) Low social dysfunction predicted superior response to interpersonal psychotherapy. 2) Low cognitive dysfunction predicted superior response to cognitive-behavior therapy and to imipramine. 3) High work dysfunction predicted superior response to imipramine. 4) High depression severity and impairment of function predicted superior response to imipramine and to interpersonal psychotherapy. CONCLUSIONS: The results demonstrate the relevance of patient characteristics, including social, cognitive, and work function, for prediction of the outcome of major depressive disorder. They provide indirect evidence of treatment specificity by identifying characteristics responsive to different modalities, which may be of value in the selection of patients for alternative treatments.

Combined pharmacotherapy and psychotherapy in the acute and continuation treatment of elderly patients with recurrent major depression: a preliminary report.

OBJECTIVE: The authors examined the rate of response to the combination of nortriptyline and interpersonal psychotherapy for acute and continuation treatment of elderly patients with recurrent major depression. METHOD: The subjects were 73 elderly patients, 61 of whom completed treatment. Nortriptyline steady-state blood levels were maintained at 80-120 ng/ml, and interpersonal psychotherapy was administered weekly for 9.1 weeks (medium) of acute therapy and was decreased from biweekly to triweekly during 16 weeks of continuation therapy. During acute treatment nonresponding patients also received brief adjunctive pharmacotherapy with lithium or perphenazine. RESULTS: Of the 61 subjects given adequate trials of nortriptyline and interpersonal psychotherapy, 48 (78.7%) achieved full remission (Hamilton depression rating of 10 or lower over 16 weeks of continuation therapy), 10 patients (16.4%) did not respond (Hamilton rating never below 15), and three achieved only partial remission (Hamilton rating of 11-14). Early versus late onset was not associated with a difference in response rate. During the placebo-controlled, double-blind transition to maintenance therapy, 19 (76.0%) of the 25 patients randomly assigned to placebo maintenance conditions showed continued recovery and six relapsed. None of the 24 patients assigned to nortriptyline conditions relapsed. CONCLUSIONS: Use of nortriptyline plus interpersonal psychotherapy for 9.1 weeks (median) of acute and 16 weeks of continuation therapy appears to be associated with good response and relatively low attrition but about a 25% chance of relapse during double-blind discontinuation of nortriptyline. These data require confirmation in a controlled clinical trial of acute and continuation therapy.

Temporal course of change of depression.

Two hundred fifty moderately to severely depressed outpatients were randomly assigned to 16 weeks of cognitive-behavioral therapy, interpersonal psychotherapy, imipramine plus clinical management (IMI-CM), or pill placebo plus clinical management. Two hundred thirty-nine patients actually began treatment. The most rapid change in depressive symptoms occurred in the IMI-CM condition, which achieved significantly better results than the other treatments at 8 and 12 weeks on 1 or more variables. Change over the course of treatment on variables hypothesized to be most specifically affected by the respective treatments was found only in the case of pharmacotherapy, in which imipramine produced significantly greater changes on the endogenous measure at 8 and 12 weeks.

Therapist competence ratings in relation to clinical outcome in cognitive therapy of depression.

This study reports on the relationship of therapist competence to the outcome of cognitive-behavioral treatment in the National Institute of Mental Health Treatment of Depression Collaborative Research Program. Outpatients suffering from major depressive disorder were treated by cognitive-behavioral therapists at each of 3 U.S. sites using a format of 20 sessions in 16 weeks. Findings provide some support for the relationship of therapist competence (as measured by the Cognitive Therapy Scale) to reduction of depressive symptomatology when controlling for therapist adherence and facilitative conditions. The results are, however, not as strong or consistent as expected. The component of competence that was most highly related to outcome is a factor that reflects the therapist's ability to structure the treatment.

Mode-specific effects among three treatments for depression.

In the NIMH Treatment of Depression Collaborative Research Program (TDCRP), 250 depressed outpatients were randomly assigned to interpersonal psychotherapy, cognitive-behavioral therapy, imipramine plus clinical management, or pill placebo plus clinical management treatments. Although all treatments demonstrated significant symptom reduction with few differences in general outcomes, an important question concerned possible effects specific to each treatment. The therapies differ in rationale and procedures, suggesting that mode-specific effects may differ among treatments, each of which was precisely specified, applied appropriately, and shown to be discriminable. Outcome measures were selected for presumed sensitivity to the different treatments. Findings provided only scattered and relatively insubstantial support for mode-specific differences. None of the therapies produced consistent effects on measures related to its theoretical origins.

Strategies for evaluating treatments for major depression in primary care patients.

Primary care physicians are being urged to provide patients experiencing a major depression treatments validated with psychiatric patients. The propriety of transferring clinical technologies from one care-giving sector to another is questionable, however, as it has little scientific support. We suggest that clinical trials be initiated so as to expand the available knowledge base. This paper analyzes the methodologic issues involved in pursuing such experimental research and urges that it be conducted despite the possible need for initial design compromises.

Influence of life events on outcome in psychotherapy.

The life events occurring to 64 outpatients participating in a psychotherapy outcome study were assessed for the 6 months before intake, during therapy itself, and during a follow-up period that averaged 7.2 months. Events were identified using a combined checklist and interview methodology. The impact of events was assessed by examining their predictive validity above and beyond that attributable to a set of demographic and clinical variables (sex, age, socioeconomic status, chronicity, and history of prior treatment). The major findings were that: a) life events did have a significant influence, but only at intake and termination and not at follow-up; b) "negative" events were more useful than the total number of events in predicting status; and c) when life events did have predictive power, the average increase in explained variance attributable to events was 13.4 per cent.

Dimensions of life stress in psychiatric patients.

A combined checklist and interview methodology was developed to assess the occurrence of life events among psychiatric patients. In addition to identifying events, patients were asked to rate them on 11 dimensions assumed to be important in mediating the impact of life stress. A factor analysis of ratings of 479 events from 64 patients, yielded three factors, reflecting the desirability of events, perceived control over their occurrence, and the readjustment required by events. However, ratings of social support available for help in coping with events and prior experience with similar events did not load on any of these factors. These dimensions should be treated as separate and potentially important influences. Three judges, blind to the patients' ratings, also made "normative" judgements of a subset of 154 events on the dimensions of desirability, control, and readjustment. Agreement among judges and between judges and patients was high with regard to desirability and control but low when rating readjustment. Judges tended to overestimate the amount of readjustment as described by patients.

Applying interpersonal psychotherapy to bereavement-related depression following loss of a spouse in late life.

The efficacy of interpersonal psychotherapy (IPT) as a treatment for outpatients with major depression has been documented in several controlled trials. Recently, IPT has been adapted specifically for depression in late life. The authors report on their experience in applying IPT to geriatric patients whose depression is temporally linked to the loss of their spouses. Detailed treatment techniques are illustrated with case vignettes. Preliminary treatment outcomes are presented for 6 subjects who showed a mean change on the 17-item Hamilton Rating Scale for Depression from 18.5 ± 2.3 SD to 7.2 ± 4.6 after an average of 17 weekly IPT sessions. IPT appears to be an effective short-term treatment for bereavement-related depression in elderly subjects.