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Psychiatry Investig. 2015 Jan;12(1):16-22. doi: 10.4306/pi.2015.12.1.16. Epub 2015 Jan 12.

The Relationship between Type D Personality and Suicidality in Low-Income, Middle-Aged Adults.

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Department of Psychiatry, Gangnam Center, Seoul National University Hospital, Seoul, Republic of Korea.
Department of Medicine, School of Medicine, Seoul National University, Seoul, Republic of Korea.
Department of Social Welfare, Induk University, Seoul, Republic of Korea.
Department of Social Welfare, Soongsil University, Seoul, Republic of Korea.
Department of Psychiatry, School of Medicine, Konkuk University, Seoul, Republic of Korea.



Low-income adults are considered to be a group at high risk for suicide. We sought to examine the effect of type D personality and other socio-demographic factors on suicidality in low-income, middle-aged Koreans.


In total, 306 low-income, middle-aged Koreans [age: 49.16±5.24 (40-59) years, 156 males, 150 females] were enrolled from the Korean National Basic Livelihood Security System. Socio-demographic data, including employment status, income, health, marital status, and educational attainment, were gathered. Beck's 19-item Scale for Suicidal Ideation (SSI) was applied to evaluate suicidality, and the DS14 was used to assess type D personality.


Unemployment (p<0.01) and absence of spouse (p=0.03) predicted higher SSI scores independent of other socioeconomic factors. All type D personality scores [i.e., negative affectivity (NA), social inhibition (SI), and total score] predicted higher SSI scores independent of all socioeconomic factors (all, p<0.001). Subjects with type D personality had higher SSI scores (p<0.001), and the association between suicidality and socio-demographic factors (employment or physical health) could be found only in subjects without type D personality.


Type D personality was a risk factor for suicide in low-income Koreans, independently from socio-economic factors. In addition, the socio-demographic factors were less prominently associated with suicidality in those with type D personality.


Low-income; Suicide; Type D personality

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