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One-Year Follow-Up of the Effectiveness of Cognitive Behavioral Group Therapy for Patients' Depression: A Randomized, Single-Blinded, Controlled Study.

Chiang KJ, Chen TH, Hsieh HT, Tsai JC, Ou KL, Chou KR - ScientificWorldJournal (2015)

Bottom Line: After receiving CBGT, the experimental group had a statistically significant reduction in the BDI-II from 40.30 at baseline to 17.82 points at session eight and to 10.17 points at postintervention (P < 0.001).Similar effects were seen on the HRSD.ATQ significantly decreased at the 12th session, 6 months after sessions, and 1 year after the sessions ended (P < 0.001).

View Article: PubMed Central - PubMed

Affiliation: Graduate Institute of Nursing, College of Nursing, Taipei Medical University, No. 250 Wu-Hsing Street, Taipei 11031, Taiwan ; Department of Nursing, Tri-Service General Hospital, National Defense Medical Center, Sec. 2, No. 325 Chenggong Road, Taipei City 11490, Taiwan.

ABSTRACT
The aim of the study was to investigate the long-term (one year) effectiveness of a 12-session weekly cognitive behavior group therapy (CBGT) on patients with depression. This was a single-blind randomized controlled study with a 2-arm parallel group design. Eighty-one subjects were randomly assigned to 12 sessions intervention group (CBGT) or control group (usual outpatient psychiatric care group) and 62 completed the study. The primary outcome was depression measured with Beck Depression Inventory (BDI-II) and Hamilton Rating Scale for Depression (HRSD). The secondary outcomes were automatic thoughts measured by automatic thoughts questionnaire (ATQ). Both groups were evaluated at the pretest (before 2 weeks), posttest (after 12 therapy sessions), and short- (3 months), medium- (6 months), and long-term (12 months) follow-up. After receiving CBGT, the experimental group had a statistically significant reduction in the BDI-II from 40.30 at baseline to 17.82 points at session eight and to 10.17 points at postintervention (P < 0.001). Similar effects were seen on the HRSD. ATQ significantly decreased at the 12th session, 6 months after sessions, and 1 year after the sessions ended (P < 0.001). We concluded that CBGT is effective for reducing depression and continued to be effective at 1 year of follow-up.

No MeSH data available.


Related in: MedlinePlus

Participant flow at each step after randomization.
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Related In: Results  -  Collection


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fig1: Participant flow at each step after randomization.

Mentions: The sample size was estimated using G-Power. G-Power is an application which performs a power analysis. This study used an alpha value of 0.05, a power of 0.80, an effect size of 0.53 (based on a previous meta-analysis) [20], and 3 repeated measures (including at 3, 6, and 12 months); the required number for a valid sample was determined to be 43. Dropout was considered, and eighty-one participants were recruited for this study. Forty-one participants were randomized to the experimental group and forty participants to the control group. Eleven and eight participants withdrew from the experimental and control group, respectively, due to lack of interest or hospitalization (dropout rates 27% and 20%, resp.). This left thirty participants in the experimental group and thirty-two participants in the control group (Figure 1).


One-Year Follow-Up of the Effectiveness of Cognitive Behavioral Group Therapy for Patients' Depression: A Randomized, Single-Blinded, Controlled Study.

Chiang KJ, Chen TH, Hsieh HT, Tsai JC, Ou KL, Chou KR - ScientificWorldJournal (2015)

Participant flow at each step after randomization.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4563093&req=5

fig1: Participant flow at each step after randomization.
Mentions: The sample size was estimated using G-Power. G-Power is an application which performs a power analysis. This study used an alpha value of 0.05, a power of 0.80, an effect size of 0.53 (based on a previous meta-analysis) [20], and 3 repeated measures (including at 3, 6, and 12 months); the required number for a valid sample was determined to be 43. Dropout was considered, and eighty-one participants were recruited for this study. Forty-one participants were randomized to the experimental group and forty participants to the control group. Eleven and eight participants withdrew from the experimental and control group, respectively, due to lack of interest or hospitalization (dropout rates 27% and 20%, resp.). This left thirty participants in the experimental group and thirty-two participants in the control group (Figure 1).

Bottom Line: After receiving CBGT, the experimental group had a statistically significant reduction in the BDI-II from 40.30 at baseline to 17.82 points at session eight and to 10.17 points at postintervention (P < 0.001).Similar effects were seen on the HRSD.ATQ significantly decreased at the 12th session, 6 months after sessions, and 1 year after the sessions ended (P < 0.001).

View Article: PubMed Central - PubMed

Affiliation: Graduate Institute of Nursing, College of Nursing, Taipei Medical University, No. 250 Wu-Hsing Street, Taipei 11031, Taiwan ; Department of Nursing, Tri-Service General Hospital, National Defense Medical Center, Sec. 2, No. 325 Chenggong Road, Taipei City 11490, Taiwan.

ABSTRACT
The aim of the study was to investigate the long-term (one year) effectiveness of a 12-session weekly cognitive behavior group therapy (CBGT) on patients with depression. This was a single-blind randomized controlled study with a 2-arm parallel group design. Eighty-one subjects were randomly assigned to 12 sessions intervention group (CBGT) or control group (usual outpatient psychiatric care group) and 62 completed the study. The primary outcome was depression measured with Beck Depression Inventory (BDI-II) and Hamilton Rating Scale for Depression (HRSD). The secondary outcomes were automatic thoughts measured by automatic thoughts questionnaire (ATQ). Both groups were evaluated at the pretest (before 2 weeks), posttest (after 12 therapy sessions), and short- (3 months), medium- (6 months), and long-term (12 months) follow-up. After receiving CBGT, the experimental group had a statistically significant reduction in the BDI-II from 40.30 at baseline to 17.82 points at session eight and to 10.17 points at postintervention (P < 0.001). Similar effects were seen on the HRSD. ATQ significantly decreased at the 12th session, 6 months after sessions, and 1 year after the sessions ended (P < 0.001). We concluded that CBGT is effective for reducing depression and continued to be effective at 1 year of follow-up.

No MeSH data available.


Related in: MedlinePlus