Causal analysis of exercise and calcium intake behaviors for osteoporosis prevention among young women in Thailand

Abstract

The goal of health education is to provide information to affect attitudes, beliefs, and intentions for behavior change. However, little is known about the effects of changes in knowledge on behaviors for osteoporosis prevention. Our objective is to develop and test theoretical models of the effects of knowledge, attitude, and self-efficacy on exercise and calcium intake among young women before and after an intervention program. First, we hypothesized that knowledge would positively predict attitude, self-efficacy, calcium intake, and exercise. Second, attitude would positively predict self-efficacy, calcium intake, and exercise. Third, self-efficacy would positively predict calcium intake and exercise. Fourth, attitude and self-efficacy would mediate the effect of knowledge on calcium intake and exercise. At the beginning and end of the study, participants in the control group and intervention group completed the osteoporosis knowledge test, the osteoporosis health belief scale, the osteoporosis self-efficacy scale, a self-report for food records, and exercise. The causal model was examined as a result of our study. After the intervention program, calcium intake and exercise were predicted by knowledge when mediated by attitudes and self-efficacy. The final model accounted for 30% and 45% of the variance in calcium intake and exercise, respectively. We conclude that interventions to enhance young women's knowledge and self-efficacy may result in increased calcium intake and exercise.