Effects of a non-face-to-face behavioral weight-control program among Japanese overweight males: a randomized controlled trial.

Background: Weight control has been major health issue in the prevention of lifestyle-related diseases especially among middle-aged working males in Japan. The computerized behavioral program is expected as an effective and feasible intervention tool.

Purpose: The purpose of this study is to examine two hypotheses.

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

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.