Fatemeh Mardanpour - Master Student of Health Education and Health Promotion, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.
Monireh Abdollahi - PhD Student of Health Education and Health Promotion, Department of Health Education and Health Promotion, Social Determinants of Health Research Center & Research Committee, School of Health, Mashhad University of Medical Sciences, Mashhad,
Jamshid Jamali - Assistant Professor of Biostatistics, Department of Epidemiology and Biostatistics, Social Determinants of Health Research Center, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.
Mohammad Vahedian Shahroodi - Associate Professor of Health Education and Health Promotion, Social Determinants of Health Research Center, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.
Mehrsadat Mahdizadeh - Assistant Professor of Health Education and Health Promotion, Department of Health Education and Health Promotion, Social Determinants of Health Research Center, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran.

Introduction: Diabetes is one of the most common non-communicable diseases that can be prevented and controlled by following a healthy lifestyle. This study aimed to apply the theory of planned behavior in determining the predictors of nutritional behavior in women with prediabetes referred to the comprehensive health service centers of Mashhad University of Medical Sciences. Methods: This descriptive-analytical study was conducted in ۲۰۲۰. A total of ۱۹۶ pre-diabetic women referred to Mashhad Comprehensive Health Service Center (Iran) were selected by multi-stage random sampling. To collect the data, a researcher-made questionnaire including demographic information based on the theoretical structures of planned behavior [attitude, subjective norms, behavioral control, and intention to follow a healthy diet] was used. Data were analyzed in SPSS-۲۵ software at a significance level of ۰.۰۵. Results: The mean of total scores obtained in Attitude constructs ۴.۱ ± ۰.۵۰, subjective norms ۳.۶۷ ± ۱.۰۶, perceived behavioral control ۴.۱۳ ± ۰.۵۵ and behavioral intention ۴.۰۰ ± ۰.۳۹ and healthy eating behavior ۳.۰۰ ± ۰.۶۵ was reported. The construct of the subjective norm (β = ۰.۲۵۴) was a strong predictor in the structure of intention and intention (β = ۰.۴۱۹) and perceived behavioral control (β = ۰.۲۴۰) was a strong predictor of nutritional behavior (p <۰.۰۰۱). Planned behavior theory was able to predict ۴۰.۵% of eating behavior in women with prediabetes. Conclusion: It seems that by applying the planned theory in the design of educational programs, it is possible to improve the observance of a healthy diet in women with prediabetes.

Planned Behavior Theory, Nutritional behavior, Prediabetes, Women