Objective: Type D personality, tendency trait to experience increased NA (Negative Affect) and SI (Social Inhibition) has been associated with negative psychological conditions linked to heart disease. This study aimed to examine the psychometric properties of the Malay version of Type D personality scale (DS14) among Malaysian patients with coronary artery disease (CAD). Methods: In this cross-sectional study 195 patients diagnosed with CAD were selected from National Heart Institute, Kuala Lumpur. They completed the questionnaire including demographic information and the Malay version of DS14 and Hospital Anxiety and Depression Scale (HADS). Results: The structural validity, as demonstrated by exploratory factor analysis of the DS14 was acceptable. The Cronbach's α coefficient for the NA and SI subscales were 0.876 and 0.732, respectively. With the standardized cut-off of NA ≥ 10 and SI ≥ 10, 28.2% of the patients with CAD were defined as having a Type D personality. Anxiety was significantly higher among patients with Type D personality. Conclusion: The results indicate that the Type D personality (DS14) questionnaire is a valid and reliable tool in the Malaysian population. The prevalence of Type D personality in Malaysia falls close to what has been found in Western countries, at least for CAD patients. This study indicates also that it is possible to use the DS14 among the Malaysian population in future cross-cultural studies. ASEAN Journal of Psychiatry, Vol. 15 (2): July - December 2014: 186-195.
The Hospital Anxiety and Depression Scale (HADS) is a common screening instrument used to determine the levels of anxiety and depression experienced by a patient and has been extensively used in patients with coronary artery disease (CAD). This study aimed to establish the factor structure of HADS in a Malaysian sample of 189 patients with CAD. Factor analysis of HADS using principal component analysis with varimax rotation yielded 3 factors. Confirmatory factor analysis supported the use of HADS in assessing 3 distinct dimensions of psychological distress--namely, anxiety, anhedonia, and psychomotor retardation. The HADS showed good internal consistency and was found to be a valid measure of psychological distress among Malaysian patients with CAD. However, low mean scores on the original 2 factors--that is, anxiety and depression--and also on the 2 depression subscales--anhedonia and psychomotor retardation--suggests that the recommended cutoff score to screen for psychological distress among CAD patients be reevaluated. Further research to determine the generalizability and consistency for the tridimensional structure of the HADS in Malaysia is recommended.