Key result
The Japanese version of the DS14 demonstrated a valid two-factor structure (social inhibition and negative affectivity) with adequate fitness and acceptable internal consistency.
Why the study?
Is the Japanese version of the Type D Scale (DS14) a valid and reliable tool for evaluating Type D personality in patients with coronary heart disease?
Cross-Sectional (n=291)
Is the Japanese version of the Type D Scale (DS14) a valid and reliable tool for evaluating Type D personality in patients with coronary heart disease?
Effect estimate: Cronbach's alpha SI=0.862, NA=0.799
The Japanese version of the DS14 is a valid and reliable instrument for assessing Type D personality in patients with coronary heart disease.
Supports DS14 use in Japanese CHD patients; extends Type D assessment to Asian cohorts but needs outcome validation.
Type D personality has recently attracted attention as a psychological factor closely related to the onset and progression of coronary heart disease (CHD). The purpose of the present research was to develop the Japanese version of Type D scale and to evaluate its validity and reliability. Participants (N=291; 133 CHD patients, 158 normal adults) completed questionnaires including the Japanese version of the Type D Scale (DS14), Hospital Anxiety and Depression Scale (HADS), Kikuchi's Social Skills Scale-18 (Kiss-18), and Negative Emotional Suppression Tendency Scale. Exploratory factor analysis of Japanese DS14 revealed two factors (social inhibition: SI, and negative affectivity: NA) comprised of 14 items. Confirmatory factor analysis indicated an adequate index of fitness. In addition, the scale had an acceptable internal consistency (Cronbach's alpha, SI=.862, and NA=.799), as well as adequate reliability. These results indicate that the Japanese version of DS14 is a clinically useful scale for evaluating Type D personality in patients with CHD.
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Ishihara et al. (2015) conducted a cross-sectional in Coronary heart disease (n=291). Japanese version of Type D Scale (DS14) was evaluated on Validity and reliability (internal consistency) of the Japanese DS14 (Cronbach's alpha SI=0.862, NA=0.799). The Japanese version of the DS14 demonstrated a valid two-factor structure (social inhibition and negative affectivity) with adequate fitness and acceptable internal consistency.
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