Psychometric properties and osteoprotective behaviors among type 2 diabetic patients: osteoporosis self-efficacy scale Malay version (OSES-M)

• Published in: Osteoporosis international Vol. 24; no. 3; pp. 929 - 940
• Main Authors: Abdulameer, S. A., Syed Sulaiman, S. A., Hassali, M. A., Subramaniam, K., Sahib, M. N.
• Format: Journal Article
• Language: English
• Published: London Springer-Verlag 01-03-2013; Springer Nature B.V
• Subjects: Adult; Aged; Aged, 80 and over; Bone mineral density; Cross-Sectional Studies; Data processing; Demography; Diabetes; Diabetes mellitus; Diabetes Mellitus, Type 2 - complications; Diabetes Mellitus, Type 2 - psychology; Endocrinology; Factor analysis; Female; Health Behavior; Health Knowledge, Attitudes, Practice; Humans; Language; Malaysia; Male; Medicine; Medicine & Public Health; Middle Aged; Original Article; Orthopedics; Osteopenia; Osteoporosis; Osteoporosis - etiology; Osteoporosis - prevention & control; Osteoporosis - psychology; Psychometrics; Quantitative psychology; Regression analysis; Reproducibility of Results; Rheumatology; Self Efficacy; Sensitivity and Specificity; Socioeconomic Factors; Malaysia; Osteoporosis; Validity; Diabetes; Multivariate analysis; Self-efficacy
• ISSN: 0937-941X; 1433-2965
• DOI: 10.1007/s00198-012-2071-1

Summary
In type 2 diabetic patients (T2DM), only 22 % have normal bone mineral density and almost three quarters of the sample population had low self-efficacy towards osteoporosis. These results reflect the need for screening and educational programs to increase the awareness of T2DM towards osteoporosis.
Introduction
Our aim was to translate and examine the psychometric properties of the Malay version of the osteoporosis self-efficacy scale (OSES-M) among T2DM and to determine the best cut-off value with optimum sensitivity and specificity. In addition, to assess factors that affects diabetic patients' osteoporosis self-efficacy.
Methods
A standard “forward-backward” procedure was used to translate the OSES into Malay language, which was then validated with a convenience sample of 250 T2DM. The sensitivity and specificity of the OSES-M was calculated using receiver operating characteristic curve analysis. Bivariate and multivariate approaches were used to examine multiple independent variables on each dependent variable.
Results
The mean score of OSES-M was 731.74 ± 197.15. Fleiss' kappa, content validity ratio range, and content validity index were 0.99, 0.75–1, and 0.96, respectively. Two factors were extracted from exploratory factor analysis and were confirmed through confirmatory factor analysis. Internal consistency and test–retest reliability were 0.92 and 0.86, respectively. The optimum cut-off point of OSES-M to predict osteoporosis/osteopenia was 858. Regression analysis revealed that knowledge, health belief, and some demographic data had an impact on OSES-M.
Conclusions
The results show that the OSES-M is a reliable and valid instrument for measuring osteoporosis self-efficacy in the Malaysian clinical setting.