title: A structural equation model to predict the social-cognitive determinants related to physical activity in Iranian women with diabetes mellitus.
abstract: BACKGROUND
  Lifestyle-modification programs including physical activity are essential for both treatment and prevention of Type 2 Diabetes Mellitus (T2DM). However, factors associated with physical activity among patients are poorly understood. This study applied Social-Cognitive Theory (SCT) for predicting determinants of physical activity among women with T2DM in Iran, 2013.
  
  
  METHODS
  In this cross-sectional study, partial least square path modeling (PLS-PM) was used as an estimation technique for structural equation model. This model specified hypotheses between components of Social-cognitive Theory on physical activity behavior. A random sample of 300 women with T2DM was selected, and completed SCT constructs instrument. Data were analyzed using statistical software WarpPLS Ver. 4.0.
  
  
  RESULTS
  The model explained 26% of the variance in physical activity. Self-regulation, task self-efficacy and barrier self-efficacy were significantly direct predictors of physical activity among women with T2DM. Task self-efficacy, social support and modeling had significantly indirect effects on physical activity behavior (P<0.001).
  
  
  CONCLUSIONS
  Our findings showed evidence for adequacy of a theoretical framework that could be used to predict physical activity behavior among women with T2DM.
authors.affiliation: Department of Biostatistics and Epidemiology, Health Sciences Research Center, School of Public Health, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Habibollah
authors.initials: H
authors.lastname: Esmaeily
authors.affiliation: Department of Health and Management, Health Sciences Research Center, School of Public Health, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Nooshin
authors.initials: N
authors.lastname: Peyman
authors.affiliation: Department of Biostatistics and Epidemiology, Health Sciences Research Center, School of Public Health, Mashhad University of Medical Sciences, Mashhad, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Taghipour
authors.affiliation: Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
authors.forename: Fatemeh
authors.initials: F
authors.lastname: KHorashadizadeh
authors.affiliation: Department of Health education and promotion, School of Health, Iran University of Medical Sciences, Tehran, Iran. msmahdizadeh@gmail.com.
authors.forename: Mehrsadat
authors.initials: M
authors.lastname: Mahdizadeh
mesh_terms: D003071:Cognition; D003430:Cross-Sectional Studies; D003924:Diabetes Mellitus, Type 2 / Q000517:prevention & control / Q000523:psychology*; D015444:Exercise / Q000523:psychology*; D005260:Female; D006801:Humans; D007492:Iran; D008019:Life Style; D008875:Middle Aged; D008960:Models, Psychological; D009043:Motor Activity; D011582:Psychological Theory; D020377:Self Efficacy; D012944:Social Support
keywords: Cognitive; Diabetes Mellitus; Model; Physical Activity; Psychosocial Factors