A Randomized Incentive-Based Weight Loss Trial in Singapore

This study is currently recruiting participants. (see Contacts and Locations)
Verified May 2013 by Duke-NUS Graduate Medical School
Sponsor:
Collaborator:
Singapore General Hospital
Information provided by (Responsible Party):
Eric A. Finkelstein, Duke-NUS Graduate Medical School
ClinicalTrials.gov Identifier:
NCT01533454
First received: February 12, 2012
Last updated: May 13, 2013
Last verified: May 2013
  Purpose

The purpose of this study is to test the extent to which incentives, when combined with an existing evidence-based weight loss program, improve weight loss and weight loss maintenance. It will also compare the cost-effectiveness of the incentive-based weight loss programs to the basic program without incentives.


Condition Intervention
Obesity
Incentives
Other: Financial Incentives

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective
Official Title: A Randomized Incentive-Based Weight Loss Trial in Singapore

Resource links provided by NLM:


Further study details as provided by Duke-NUS Graduate Medical School:

Primary Outcome Measures:
  • Weight change [ Time Frame: Baseline, 4 months, 8 months and 12 months ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Percent body fat [ Time Frame: Baseline, 4 months, 8 months, 12 months ] [ Designated as safety issue: No ]
  • Self-reported physical activity [ Time Frame: Baseline, 4 months, 8 months, 12 months ] [ Designated as safety issue: No ]
  • Steps, aerobic steps and minutes of physical activity [ Time Frame: Monthly through month 8 (in incentive arms) ] [ Designated as safety issue: No ]
  • Intrinsic and Extrinsic motivation [ Time Frame: Baseline ] [ Designated as safety issue: No ]
  • Sociodemographics [ Time Frame: Baseline ] [ Designated as safety issue: No ]
  • Health-related quality of life [ Time Frame: Baseline, 4 months, 8 months, 12 months ] [ Designated as safety issue: No ]
  • Intervention costs [ Time Frame: Baseline through month 8 ] [ Designated as safety issue: No ]

Estimated Enrollment: 188
Study Start Date: September 2012
Estimated Study Completion Date: December 2014
Estimated Primary Completion Date: December 2014 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
Control
Control participants will attend a 4-month structured weight-loss program and attend subsequent follow-ups at 4-month intervals upon completion of the program.
Incentives
Incentive arm participants will be offered an additional program (in addition to the COMM program) where they can earn incentives for meeting specified weight loss targets or step goals. They will be offered a choice between traditional (payments with certainty) and behavioral(payments paid via lottery) incentives.
Other: Financial Incentives
Incentive arm participants will be able to earn incentives for meeting specified weight loss targets or step goals. They will be offered a choice between traditional (payments with certainty) and behavioral(payments paid via lottery) incentives.

Detailed Description:

Globally, the rise in obesity rates has reached epidemic proportions, and in Singapore 53% of adults have a body mass index (BMI) great than 23.0 kg/m2, a level that increases risk for chronic disease among Asians. This study aims to test the extent to which traditional or behavioural economic incentives, when combined with an existing evidence-based weight loss program, improve weight loss and weight loss maintenance. Data will be collected through a two-arm (basic weight loss program, basic program plus traditional or behavioural economic incentives) randomized controlled trial (RCT) where key outcome variables are defined as weight loss (kilograms) at 8 months when the incentive program concludes, and at 12 months, after a 4 month period in which no additional incentives are provided. We hypothesize that at both 8 and 12 months, weight loss will be greater in the incentive arm than in the arm without incentives. The growing obesity epidemic, the high costs of obesity to employers, insurers and governments across Asia, and the fact that the incentive program is designed to be close to cost neutral, suggest that this research has high potential to have a significant public health impact, both in Singapore and the region.

  Eligibility

Ages Eligible for Study:   21 Years to 65 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

Individuals aged 21 and above with a BMI greater than 25.

Criteria

Inclusion Criteria:

  • Signed informed consent
  • Age 21+
  • BMI 25+
  • Willing to be randomized into 1 of the 2 study arms
  • Willing to pay the $399 entry fee
  • Stated willingness to commit to participating in all assessments regardless of weight change or study arm

Exclusion Criteria:

  • Current pregnancy/lactation (women who become pregnant during the study will be withdrawn)
  • Type 1 diabetes
  • Type 2 diabetes on medication other than Metformin
  • End-stage Renal Disease
  • Ischemic Heart Disease requiring intervention in the past 6 months
  • Thyroid disease that has yet to stabilize
  • Changes in weight of greater than 3% in the past 6 months
  • Use of weight loss medication in the past 6 months
  • Malignancy requiring chemotherapy/radiation in the past 5 years
  • Acute medical problems requiring 3+ days of missed work during previous 4 week period
  • Any serious hospitalization or surgery in the past 6 months
  • Use of corticosteroids in the past 6 months
  • Answer 'YES' to any of the PAR-Q questions
  • Unable to obtain MD consent from a physician giving permission to participate in the study
  • Evidence of clinical depression (as assessed by the Beck Depression Inventory)
  • Currently on medications for a mental health or substance abuse condition
  • Evidence of binge eating based on the Binge Eating Disorders Scale (BEDS)
  • Unable to communicate in English
  • Additional concerns in which the clinical investigator deems problematic for participation
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01533454

Locations
Singapore
Singapore General Hospital Recruiting
Singapore, Singapore, 169608
Contact: Geetha Chandrasagaran    9646 4626    geetha.chandrasagaran@sgh.com.sg   
Principal Investigator: Kwang Wei Tham, MB, BCh, BAO, MD, ABIM         
Sponsors and Collaborators
Duke-NUS Graduate Medical School
Singapore General Hospital
Investigators
Principal Investigator: Eric A. Finkelstein, PhD, MHA Duke-NUS Graduate Medical School
  More Information

No publications provided

Responsible Party: Eric A. Finkelstein, Professor, Duke-NUS Graduate Medical School
ClinicalTrials.gov Identifier: NCT01533454     History of Changes
Other Study ID Numbers: 0742_001
Study First Received: February 12, 2012
Last Updated: May 13, 2013
Health Authority: Singapore: Domain Specific Review Boards

Keywords provided by Duke-NUS Graduate Medical School:
Obesity
Weight loss
Incentives
Motivation

Additional relevant MeSH terms:
Obesity
Weight Loss
Body Weight
Body Weight Changes
Nutrition Disorders
Overnutrition
Overweight
Signs and Symptoms

ClinicalTrials.gov processed this record on October 23, 2014