Marital status and suicide risk: Temporal effect of marital breakdown and contextual difference by socioeconomic status

Erik Oftedahl Næss; Lars Mehlum; Ping Qin

doi:10.1016/j.ssmph.2021.100853

Marital status and suicide risk: Temporal effect of marital breakdown and contextual difference by socioeconomic status

SSM Popul Health. 2021 Jun 20:15:100853. doi: 10.1016/j.ssmph.2021.100853. eCollection 2021 Sep.

Authors

Erik Oftedahl Næss¹, Lars Mehlum¹, Ping Qin¹

Affiliation

¹ National Center for Suicide Research and Prevention, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Sognsvannsveien 21, N-0372, Oslo, Norway.

Abstract

Research has shown that people who have never been married, divorced, or widowed are at an increased risk of suicide compared with those who are married, but we have little knowledge as to how this elevated risk is modified by socioeconomic factors, and little research has studied the risk among persons enduring a marital separation. This study addressed these issues with individual-level data from Norwegian national registers. All suicide cases in people above 18 years that took place in the period 1992-2012 (n = 11 051) were compared with living controls (185 685) matched on sex and age via a nested case control design, and suicide risk associated with marital status was assessed with conditional logistic regression. The results showed that, compared with a status of being married, suicide risk was highly associated with a status of being never married, separated, divorced, or widowed, even after adjustment for income-level, educational attainment, centrality of residence, and immigration status. The strongest effect was seen for a separated status; compared to the married, separated persons were fully 6.06 times more apt to die by suicide, and the effect was strongest in the 30 days following a separation. The observed significant associations remained but differed in strength by sex and age, and there were significant deviations by personal socioeconomic status. Most notably, the increased risk was higher for never-married persons with low educational attainment or income. However, most interaction effects (10/16) did not yield significant results. In conclusion, suicide risk is strongly associated with a single status of any form with the highest risk during a marital separation, but the increased risk varies in strength according to individual-level factors. The stress and loss of support induced by marital dissolution are important contributing risk factors for suicide, and persons with low income may be especially vulnerable.

Keywords: Marital separation; Marital status; Marriage; Registry data; Socioeconomic status; Suicide.