OBJECTIVES: To determine the association of early and long-term reductions in worry symptoms after cognitive behavior therapy (CBT) for generalized anxiety disorder (GAD) in older adults. DESIGN: Substudy of larger randomized controlled trial. SETTING:Family medicine clinic and large multispecialty health organization in Houston, TX, between March 2004 and August 2006. PARTICIPANTS: Patients (N = 76) aged 60 years or older with a principal or coprincipal diagnosis of GAD, excluding those with significant cognitive impairment, bipolar disorder, psychosis, or active substance abuse. INTERVENTION: CBT, up to 10 sessions for 12 weeks, or enhanced usual care (regular, brief telephone calls, and referrals to primary care provider as needed). MEASUREMENTS: Penn State Worry Questionnaire (PSWQ) administered by telephone at baseline, 1 month (mid treatment), 3 months (posttreatment), and at 3-month intervals through 15 months (1-year follow-up). The authors used binary logistic regression analysis to determine the association between early (1 month) response and treatment responder status (reduction of more than 8.5 points on the PSWQ) at 3 and 15 months. The authors also used hierarchical linear modeling to determine the relationship of early response to the trajectory of score change after posttreatment. RESULTS: Reduction in PSWQ scores after the first month predicted treatment response at posttreatment and follow-up, controlling for treatment arm and baseline PSWQ score. The magnitude of early reduction also predicted the slope of score change from posttreatment through the 15-month assessment. CONCLUSION: Early symptom reduction is associated with long-term outcomes after psychotherapy in older adults with GAD.
RCT Entities:
OBJECTIVES: To determine the association of early and long-term reductions in worry symptoms after cognitive behavior therapy (CBT) for generalized anxiety disorder (GAD) in older adults. DESIGN: Substudy of larger randomized controlled trial. SETTING: Family medicine clinic and large multispecialty health organization in Houston, TX, between March 2004 and August 2006. PARTICIPANTS: Patients (N = 76) aged 60 years or older with a principal or coprincipal diagnosis of GAD, excluding those with significant cognitive impairment, bipolar disorder, psychosis, or active substance abuse. INTERVENTION: CBT, up to 10 sessions for 12 weeks, or enhanced usual care (regular, brief telephone calls, and referrals to primary care provider as needed). MEASUREMENTS: Penn State Worry Questionnaire (PSWQ) administered by telephone at baseline, 1 month (mid treatment), 3 months (posttreatment), and at 3-month intervals through 15 months (1-year follow-up). The authors used binary logistic regression analysis to determine the association between early (1 month) response and treatment responder status (reduction of more than 8.5 points on the PSWQ) at 3 and 15 months. The authors also used hierarchical linear modeling to determine the relationship of early response to the trajectory of score change after posttreatment. RESULTS: Reduction in PSWQ scores after the first month predicted treatment response at posttreatment and follow-up, controlling for treatment arm and baseline PSWQ score. The magnitude of early reduction also predicted the slope of score change from posttreatment through the 15-month assessment. CONCLUSION: Early symptom reduction is associated with long-term outcomes after psychotherapy in older adults with GAD.
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