The purpose of this study is to evaluate the effectiveness of a cognitive behavioural treatment (CBT) designed to help obese patients lose weight and to maintain their weight losses over time. It is hypothesized that CBT will result in greater sustained weight loss compared to a standard behavioural weight loss program.

Official Title

A Randomized Controlled Trial of Maintenance-Oriented Cognitive Behavioural Therapy in the Treatment of Obesity



Study Type


Study Design

Treatment, Randomized, Open Label, Active Control, Single Group Assignment, Efficacy Study

Further Details

Primary Outcome Measures:

  • The following assessment procedures will be administered at baseline, post-treatment, and the 1-year follow-up .
  • Medical outcomes: anthropometric and metabolic/cardiovascular parameters.
  • Psychosocial outcomes: obesity-specific quality of life (IWQOL-Lite); eating disturbance (BES); body dissatisfaction (PASTAS); mood disturbance (DASS); cognitive disturbance (YSQ-S).

Study Start

March 2006; Expected completion: March 2008

Eligibility & Criteria

  • Ages Eligible for Study: 18 Years – 65 Years
  • Genders Eligible for Study: Both

Inclusion Criteria:

  • The participants will be recruited from among patients referred to the Metabolism and Obesity Service of Royal Prince Alfred Hospital.
  • The inclusion criteria include: 18-65 years of age and a body mass index (BMI: kg/m2) between 30-45.

Exclusion Criteria:

  • psychiatric conditions (i.e., current psychosis, severe depression, mental retardation, and drug or alcohol abuse) that would preclude full participation in the study
  • physical conditions (i.e., significant hepatic or renal dysfunction and significant cardiovascular disease such as heart failure, stroke and transient ischaemic attacks) that would preclude full participation in the study
  • current treatment for obesity
  • current treatments known to affect eating or weight (e.g., medications)
  • pregnancy

Total Enrolment


Contact Details

Metabolism and Obesity Services, Royal Prince Alfred Hospital, Sydney, New South Wales, 2050, Australia; Recruiting

  • Ian D Caterson, PhD: 61 2 9351 5010;
  • Kate S Steinbeck, PhD: 61 2 9515 9260;
  • Elizabeth Rieger, PhD: 61 2 9351 2788;

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