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Submitted: 31 Aug 2015
Accepted: 18 Mar 2016
ePublished: 11 Jun 2016
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Health Promot Perspect. 2016;6(2): 71-79.
doi: 10.15171/hpp.2016.13
PMID: 27386421
PMCID: PMC4932225
  Abstract View: 1266
  PDF Download: 988
  Full Text View: 923

Original Article

Validation and psychometric evaluation of physical activity belief scale among patients with type 2 diabetes mellitus: an application of health action process approach

Hosein Rohani 1, Ahmad Ali Eslami 2 * , Arsalan Ghaderi 3, Tohid Jafari-Koshki 4, Erfan Sadeghi 5, Mohammad Bidkhori 6, Mehdi Raei 7

1 Student Research Center, Faculty of Health, Isfahan University of Medical Sciences, Isfahan, Iran
2 Department of Health Education And Promotion, Faculty of Health, Isfahan University of Medical Sciences, Isfahan, Iran
3 Social Determinants of Health Research Center, Kurdistan University of Medical Sciences, Kurdistan, Iran
4 Department of Biostatistics, Faculty of Health, Tabriz University of Medical Sciences, Tabriz, Iran
5 Department of Biostatistics, Kermanshah University of Medical Sciences, Kermanshah, Iran
6 Department of Epidemiology, Sabzevar University of Medical Sciences, Sabzevar, Iran
7 Department of Basic Sciences, Qom University of Medical Sciences, Qom, Iran

Abstract

Background: Moderate increase in physical activity (PA) may be helpful in preventing or postponing the complications of type 2 diabetes mellitus (T2DM). The aim of this study was to assess the psychometric properties of a health action process approach (HAPA)-based PA inventory among T2DM patients.

Methods: In 2015, this cross-sectional study was carried out on 203 participants recruited by convenience sampling in Isfahan, Iran. Content and face validity was confirmed by a panel of experts. The comments noted by 9 outpatients on the inventory were also investigated. Then,the items were administered to 203 T2DM patients. Construct validity was conducted using exploratory and structural equation modeling confirmatory factor analyses. Reliability was also assessed with Cronbach alpha and inter-class correlation coefficient (ICC).

Results: Content validity was acceptable (CVR = 0.62, CVI = 0.89). Exploratory factor analysis extracted seven factors (risk- perception, action self-efficacy, outcome expectancies, maintenance self-efficacy, action and coping planning, behavioral intention, and recovery self efficacy)explaining 82.23% of the variation. The HAPA had an acceptable fit to the observations(χ2 = 3.21, df = 3, P = 0.38; RMSEA = 0.06; AGFI = 0.90; PGFI = 0.12). The range of Cronbach alpha and ICC for the scales was about 0.63 to 0.97 and 0.862 to 0.988, respectively.

Conclusion: The findings of the present study provided an initial support for the reliability and validity of the HAPA-based PA inventory among patients with T2DM.

Keywords: Health behavior, Psychometric properties, Physical activity, Diabetes mellitus, Validation, Health action process approach
Citation: Rohani H, Eslami AA, Ghaderi A, Jafari T, Sadeghi E, Bidkhori M, et al. Validation and psychometric evaluation of physical activity belief scale among patients with type 2 diabetes mellitus: an application of health action process approach. Health Promot Perspect.2016;6(2):71-79. doi: 10.15171/hpp.2016.13.
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