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Evaluation of the reliability and validity of the Diabetes Management Self-Efficacy Scale for diabetic outpatients in third level hospitals in Shanghai

CHEN Qi1,2, WANG Ze-zhou1, CHEN Yu-hong2, ZHOU Ying-xia2, LU Luo2, CHEN Min-jie3, LI Zhong-ren4, FEI Jian2, CAI Yong1   

  1. 1.School of Public Health, Shanghai Jiao Tong University, Shanghai 200025, China; 2.Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; 3.Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China; 4.Shanghai Ninth People‘s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
  • Online:2016-05-28 Published:2016-05-26
  • Supported by:

    National Natural Science Foundation of China, 71273174; Key Discipline Construction of Health Ecomomics from Shanghai Health Bureau, 12GWZX0601; Key Discipline Construction of Public Health from Shanghai Health Bureau, 15GWZK1002

Abstract:

Objective To compile the Chinese version of the Diabetes Management Self-Efficacy Scale, evaluate its reliability, validity, and test-retest reliability, and assess the self-efficacy of diabetic outpatients in third level hospitals in Shanghai. Methods From June to August 2015, a total of 410 patients diagnosed with type-2 diabetes by diabetes clinics in Ruijin Hospital, Renji Hospital, and Shanghai Ninth People's Hospital were surveyed with questionnaires by the use of convenience sampling method. Test-retest reliability of the scale was assessed by re-surveying 32 of them two weeks after the first survey. Results The Cronbachs α coefficients for main indexes of the scale were in the range of 0.611-0.947 and the test-retest Spearman correlation coefficients were in the range of 0.418-0.980. Factor analysis indicated a good construct validity of the questionnaire. Four common factors covering healthy diet, diet and blood sugar, healthy behaviors and drug adherence could explain 70.38% contents of the scale. The overall self-efficacy and self-efficacy of each dimension in diabetic outpatients were satisfactory. The total score of self-efficacy was positively associated with that of self-management (P=0.000). Conclusion The Chinese version of the Diabetes Management Self-Efficacy Scale is reliable and credible in studying health self-management of patients with diabetes and lays a good foundation for exploring health behavior interventions in diabetic patients in Shanghai.

Key words: type-2 diabetes, Self Efficacy Scale, Reliability, Validity