IRCT20110727007132N18 IRCT 2018-06-20 Iran University of Medical Sciences Comparison of the effect of two types of SMS-based interventions (in the gain frame and the loss frame) on osteoporosis preventive nutritional behaviors in female students Comparison of the effect of two types of SMS-based interventions (in the gain frame and the loss frame) on osteoporosis preventive nutritional behaviors in female students 2017-11-21 anticipated 345 Complete https://irct.ir/trial/7575 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Other design features: There is no special characteristic in this study, Randomization description: The list of 345 students at the moment of the study is available to the researchers. The subjects will be randomly assigned to one of the three study groups (intervention group 1, intervention group 2, and control group). The first person in the list will be randomly assigned to a group. The second person will be randomly assigned to one of the remained two groups. The third person well be assigned to the third group.Similarly, the allocation of the remaining subjects will be continued in three groups. N/A Osteoporosis. Intervention 1: Intervention group 1: Sending developed SMSs related to osteoporosis in the gain frame (focused on the positive outcome) during 4 weeks. Intervention 2: Intervention group 2: Sending developed SMSs related to osteoporosis in the loss frame (focused on the loss or costs) during 4 weeks. Intervention 3: Control group: Not received any educational messages related to osteoporosis. No - There is not a plan to make this available Justification or reason for not sharing IPD is The results only will be published in the article