Suicide attempts and mortality in eating disorders: a follow-up study of eating disorder patients

Abstract

Objective: The aim of this study is to explore the prevalence of hospital-treated suicide attempts in a large clinical population of eating disorder patients.

Method: Follow-up study of adults (N=2462, 95% women, age 18-62 years) admitted to the Eating Disorder Clinic of Helsinki University Central Hospital in the period 1995-2010. For each patient, four controls were selected and matched for age, sex and place of residence. The end point events were modeled using Cox's proportional hazard model, taking matching into account.

Results: We identified 156 patients with eating disorder (6.3%) and 139 controls (1.4%) who had required hospital treatment for attempted suicide. Of them, 66 (42.3%) and 37 (26.6%) had more than one attempt. The rate ratio (RR) for suicide attempt in patients with eating disorder was 4.70 [95% confidence interval (CI) 1.41-15.74]. In anorexia nervosa, RR was 8.01 (95% CI 5.40-11.87), and in bulimia nervosa, it was 5.08 (95% CI 3.46-7.42). In eating disorder patients with a history of suicide attempt, the risk of death from any cause was 12.8%, suicide being the main cause in 45% of the deaths.

Conclusion: Suicide attempts and repeated attempts are common among patients with eating disorders. Suicidal ideation should be routinely assessed from patients with eating disorders.

Keywords: Eating disorder; Follow-up; Mortality; Suicide; Suicide attempt.