Psychological interventions for overweight or obesity

K Shaw, Peter O'Rourke, C Del Mar, Justin Kenardy

Research output: Contribution to journalArticleResearchpeer-review

272 Citations (Scopus)

Abstract

BACKGROUND: Overweight and obesity are global health problems which are increasing throughout the industrialised world. If left unchecked, they will continue to contribute to the ever increasing noncommunicable disease burden.

OBJECTIVES: To assess the effects of psychological interventions for overweight or obesity as a means of achieving sustained weight loss.

SEARCH STRATEGY: Studies were obtained from searches of multiple electronic bibliographic databases. The date of the latest search was June 2003.

SELECTION CRITERIA: Trials were included if the fulfilled the following criteria: 1) they were randomised controlled clinical trials of a psychological intervention versus a comparison intervention, 2) one of the outcome measures of the study was weight change measured by any method, 3) participants were followed for at least three months, 4) the study participants were adults (18 years or older) who were overweight or obese (BMI > 25 kg/m(2)) at baseline.

DATA COLLECTION AND ANALYSIS: Two people independently applied the inclusion criteria to the studies identified and assessed study quality. Disagreement was resolved by discussion or by intervention of a third party. Meta-analyses were performed using a fixed effect model.

MAIN RESULTS: A total of 36 studies met the inclusion criteria and were included in the review. Overall, 3495 participants were evaluated. The majority of studies assessed behavioural and cognitive-behavioural weight reduction strategies. Cognitive therapy, psychotherapy, relaxation therapy and hypnotherapy were assessed in a small number of studies. Behaviour therapy was found to result in significantly greater weight reductions than placebo when assessed as a stand-alone weight loss strategy (WMD -2.5 kg; 95% CI -1.7 to -3.3). When behaviour therapy was combined with a diet / exercise approach and compared with diet / exercise alone, the combined intervention resulted in a greater weight reduction. Studies were heterogeneous however the majority of studies favoured combining behaviour therapy with dietary and exercise interventions to improve weight loss. Increasing the intensity of the behavioural intervention significantly increased the weight reduction (WMD -2.3 kg; 95% CI -1.4 to - 3.3). Cognitive-behaviour therapy, when combined with a diet / exercise intervention, was found to increase weight loss compared with diet / exercise alone (WMD -4.9 kg; 95% CI -7.3 to - 2.4). No data on mortality, morbidity or quality of life were found.

AUTHORS' CONCLUSIONS: People who are overweight or obese benefit from psychological interventions, particularly behavioural and cognitive-behavioural strategies, to enhance weight reduction. They are predominantly useful when combined with dietary and exercise strategies. The bulk of the evidence supports the use of behavioural and cognitive-behavioural strategies. Other psychological interventions are less rigorously evaluated for their efficacy as weight loss treatments.

Original languageEnglish
Article numberCD003818
Pages (from-to)1-75
Number of pages75
JournalCochrane Database of Systematic Reviews
Issue number2
DOIs
Publication statusPublished - 18 Apr 2005

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Weight Loss
Obesity
Psychology
Behavior Therapy
Cognitive Therapy
Diet
Outcome Assessment (Health Care)
Bibliographic Databases
Relaxation Therapy
Hypnosis
Meta-Analysis
Randomized Controlled Trials
Placebos
Quality of Life
Morbidity
Weights and Measures
Mortality

Cite this

Shaw, K ; O'Rourke, Peter ; Del Mar, C ; Kenardy, Justin. / Psychological interventions for overweight or obesity. In: Cochrane Database of Systematic Reviews. 2005 ; No. 2. pp. 1-75.
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abstract = "BACKGROUND: Overweight and obesity are global health problems which are increasing throughout the industrialised world. If left unchecked, they will continue to contribute to the ever increasing noncommunicable disease burden.OBJECTIVES: To assess the effects of psychological interventions for overweight or obesity as a means of achieving sustained weight loss.SEARCH STRATEGY: Studies were obtained from searches of multiple electronic bibliographic databases. The date of the latest search was June 2003.SELECTION CRITERIA: Trials were included if the fulfilled the following criteria: 1) they were randomised controlled clinical trials of a psychological intervention versus a comparison intervention, 2) one of the outcome measures of the study was weight change measured by any method, 3) participants were followed for at least three months, 4) the study participants were adults (18 years or older) who were overweight or obese (BMI > 25 kg/m(2)) at baseline.DATA COLLECTION AND ANALYSIS: Two people independently applied the inclusion criteria to the studies identified and assessed study quality. Disagreement was resolved by discussion or by intervention of a third party. Meta-analyses were performed using a fixed effect model.MAIN RESULTS: A total of 36 studies met the inclusion criteria and were included in the review. Overall, 3495 participants were evaluated. The majority of studies assessed behavioural and cognitive-behavioural weight reduction strategies. Cognitive therapy, psychotherapy, relaxation therapy and hypnotherapy were assessed in a small number of studies. Behaviour therapy was found to result in significantly greater weight reductions than placebo when assessed as a stand-alone weight loss strategy (WMD -2.5 kg; 95{\%} CI -1.7 to -3.3). When behaviour therapy was combined with a diet / exercise approach and compared with diet / exercise alone, the combined intervention resulted in a greater weight reduction. Studies were heterogeneous however the majority of studies favoured combining behaviour therapy with dietary and exercise interventions to improve weight loss. Increasing the intensity of the behavioural intervention significantly increased the weight reduction (WMD -2.3 kg; 95{\%} CI -1.4 to - 3.3). Cognitive-behaviour therapy, when combined with a diet / exercise intervention, was found to increase weight loss compared with diet / exercise alone (WMD -4.9 kg; 95{\%} CI -7.3 to - 2.4). No data on mortality, morbidity or quality of life were found.AUTHORS' CONCLUSIONS: People who are overweight or obese benefit from psychological interventions, particularly behavioural and cognitive-behavioural strategies, to enhance weight reduction. They are predominantly useful when combined with dietary and exercise strategies. The bulk of the evidence supports the use of behavioural and cognitive-behavioural strategies. Other psychological interventions are less rigorously evaluated for their efficacy as weight loss treatments.",
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Psychological interventions for overweight or obesity. / Shaw, K; O'Rourke, Peter; Del Mar, C; Kenardy, Justin.

In: Cochrane Database of Systematic Reviews, No. 2, CD003818, 18.04.2005, p. 1-75.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Psychological interventions for overweight or obesity

AU - Shaw, K

AU - O'Rourke, Peter

AU - Del Mar, C

AU - Kenardy, Justin

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N2 - BACKGROUND: Overweight and obesity are global health problems which are increasing throughout the industrialised world. If left unchecked, they will continue to contribute to the ever increasing noncommunicable disease burden.OBJECTIVES: To assess the effects of psychological interventions for overweight or obesity as a means of achieving sustained weight loss.SEARCH STRATEGY: Studies were obtained from searches of multiple electronic bibliographic databases. The date of the latest search was June 2003.SELECTION CRITERIA: Trials were included if the fulfilled the following criteria: 1) they were randomised controlled clinical trials of a psychological intervention versus a comparison intervention, 2) one of the outcome measures of the study was weight change measured by any method, 3) participants were followed for at least three months, 4) the study participants were adults (18 years or older) who were overweight or obese (BMI > 25 kg/m(2)) at baseline.DATA COLLECTION AND ANALYSIS: Two people independently applied the inclusion criteria to the studies identified and assessed study quality. Disagreement was resolved by discussion or by intervention of a third party. Meta-analyses were performed using a fixed effect model.MAIN RESULTS: A total of 36 studies met the inclusion criteria and were included in the review. Overall, 3495 participants were evaluated. The majority of studies assessed behavioural and cognitive-behavioural weight reduction strategies. Cognitive therapy, psychotherapy, relaxation therapy and hypnotherapy were assessed in a small number of studies. Behaviour therapy was found to result in significantly greater weight reductions than placebo when assessed as a stand-alone weight loss strategy (WMD -2.5 kg; 95% CI -1.7 to -3.3). When behaviour therapy was combined with a diet / exercise approach and compared with diet / exercise alone, the combined intervention resulted in a greater weight reduction. Studies were heterogeneous however the majority of studies favoured combining behaviour therapy with dietary and exercise interventions to improve weight loss. Increasing the intensity of the behavioural intervention significantly increased the weight reduction (WMD -2.3 kg; 95% CI -1.4 to - 3.3). Cognitive-behaviour therapy, when combined with a diet / exercise intervention, was found to increase weight loss compared with diet / exercise alone (WMD -4.9 kg; 95% CI -7.3 to - 2.4). No data on mortality, morbidity or quality of life were found.AUTHORS' CONCLUSIONS: People who are overweight or obese benefit from psychological interventions, particularly behavioural and cognitive-behavioural strategies, to enhance weight reduction. They are predominantly useful when combined with dietary and exercise strategies. The bulk of the evidence supports the use of behavioural and cognitive-behavioural strategies. Other psychological interventions are less rigorously evaluated for their efficacy as weight loss treatments.

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