A randomized controlled trial on the long-term effects of a 1-month behavioral weight control program assisted by computer tailored advice

Behav Res Ther. 2007 Mar;45(3):459-70. doi: 10.1016/j.brat.2006.03.017. Epub 2006 May 22.


Objectives: To examine the long-term effects of a new behavioral weight control program (Kenkou-tatsujin, KT program). The program consisted of twice-interactive letter communications including computer-tailored personal advice on treatment needs and behavioral modification.

Design: A randomized controlled trial comparing Group KM: KT program with 6-month weight and targeted behavior's self-monitoring, Group K: KT program only, Group BM: an untailored self-help booklet with 7-month self-monitoring of weight and walking, and Group B: the self-help booklet only.

Participants: Two hundreds and five overweight Japanese females were recruited via a local newspaper.

Measurements: Weight loss (body weight, BMI, reduction quotient, etc.) and behavioral changes (daily eating, exercise and sleeping habits).

Findings: A significant weight loss was observed in all groups. At 1 month, Groups KM and K were superior, but at 7 months, the mean weight loss was significantly more in Group KM than the other 3 groups. At 7 months, 8 dietary habits and 4 physical activities were improved in all subjects. Habitual improvement was related to the weight loss in Groups KM and K at 1 month.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Analysis of Variance
  • Behavior Therapy / instrumentation
  • Behavior Therapy / methods*
  • Body Mass Index
  • Diet Records
  • Eating / psychology*
  • Feeding Behavior / psychology*
  • Female
  • Follow-Up Studies
  • Humans
  • Middle Aged
  • Obesity / drug therapy
  • Obesity / psychology*
  • Self-Assessment
  • Statistics, Nonparametric
  • Therapy, Computer-Assisted / methods*
  • Treatment Outcome
  • Weight Loss*