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 interclass 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.
Highlights
The incidence of type 2 diabetes mellitus (T2DM) is increasing worldwide.[1]
It is believed that T2DM complications can be prevented, or at least delayed, with a moderate increase in the physical activity (PA) and improvement in the diet of the patients.[5]
Materials and Methods Participants and Procedures To evaluate the health action process approach (HAPA)-based beliefs scales among Iranian diabetic patients, a cross-sectional study was conducted on the participants recruited from Al-Zahra and Feyz hospitals, Isfahan, Iran from January to September 2015
Summary
The incidence of type 2 diabetes mellitus (T2DM) is increasing worldwide.[1]. According to the recent studies in Iran, the prevalence of this disease is estimated to be 14.6% which introduce it as a leading cause of morbidity and mortality in the country.[2]. It is believed that T2DM complications can be prevented, or at least delayed, with a moderate increase in the physical activity (PA) and improvement in the diet of the patients.[5] the most of T2DM patients in Iran do not participate in a regular, moderate-intense PA.[6,7] An ongoing PA over time is a key factor to reap its benefits. 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. 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
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