the effect of education based on health belief model on the improvement of osteoporosis preventive nutritional behaviors of second grade middle school girls in isfahan

background: undoubtedly proper nutrition has a great role in the prevention of many diseases, especially osteoporosis, and in increasing intellectual and physical efficiency. considering the importance of nutrition education for school age children, this study was performed to determine the effect of health education based on health belief model on the knowledge, attitude and practice of the second grade middle school girl students in isfahan regarding osteoporosis preventive nutritional behaviors. methods: in this quasi-experimental intervention study, 130 students randomized in two experimental (66) and controls (64) groups. data collected using a standard questionnaire based on health belief model and ffq questionnaire. the standard questionnaire was completed 3 times (before, immediately and 2 months after education) and ffq questionnaire was completed 2 times (before and 2 months after education) by students. after pre-test, 4 educational session classes in experimental group were performed. finally data collected and analyzed by spss 16 software (t_ test, repeated measure anova). findings: demographic variables of studied population in two groups was similar before intervention (p>0.05). before intervention there was not significant differences between the scores of different structures of this model in two groups (p>0/05). after intervention, there was significant differences in the levels of knowledge, perceived susceptibility, perceived severity, perceived benefits, perceived barriers, and performance between experimental and control groups (p<0.001). conclusion: according to the results, the intervention had positive effect on nutritional pattern and it was effective also on improving the knowledge, attitude and practice of the students in this regard.