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Type D personality as a predictor of self-efficacy and social support in patients with type 2 diabetes mellitus

Authors Shao Y, Yin H, Wan C

Received 22 November 2016

Accepted for publication 7 February 2017

Published 20 March 2017 Volume 2017:13 Pages 855—861

DOI https://doi.org/10.2147/NDT.S128432

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Prof. Dr. Roumen Kirov

Peer reviewer comments 3

Editor who approved publication: Professor Wai Kwong Tang

Yechang Shao,1,2 Honglei Yin,3 Chengsong Wan4

1School of Public Health, Southern Medical University, 2Department of Internal Medicine, Guangdong General Hospital, Guangdong Academy of Medical Sciences, 3Department of Psychiatry, Nanfang Hospital, 4Department of Microbiology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, People’s Republic of China


Objective: The aim of this study was to estimate the prevalence of Type D personality and assess the relationship between this personality type and self-efficacy/social support in Chinese patients with type 2 diabetes mellitus (T2DM).
Patients and methods: From January 1, 2014, to July 31, 2014, 532 consecutive patients with T2DM were recruited from two hospitals in Guangzhou, China. The participants completed questionnaires containing questions about sociodemographic characteristics, Type D personality, self-efficacy, and social support scales, and their medical records were reviewed for additional data.
Results: Of the 532 patients, 18.2% had Type D personality. Patients with this personality type reported significantly lower levels of self-efficacy (P<0.001), total social support (P<0.001), subjective support (P<0.001), and support utilization (P=0.003), but similar level of objective support (P=0.314), compared to those of patients without Type D personality. Negative affectivity and social inhibition, two intrinsic traits of Type D personality, negatively correlated with self-efficacy and social support scores. Type D personality was significantly associated with less self-efficacy and social support (P<0.001), controlling for other sociodemographic factors. Glycosylated hemoglobin (HbA1c) levels were significantly higher in T2DM patients with Type D personality than in patients with non-Type D personality.
Conclusion: This study provides new evidence linking Type D personality with self-efficacy, social support, and poor glycemic control, highlighting the special need for care among T2DM patients with Type D personality.

Keywords: Type D personality, social support, self-efficacy, glycemic control, type 2 diabetes mellitus

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