Objective: We examined attempted and completed suicides after stroke to determine whether they were associated with socioeconomic status, other patient characteristics, or time after stroke.Methods: This nationwide cohort study included stroke patients from Riksstroke (the Swedish Stroke Register) from 2001 to 2012. We used personal identification numbers to link the Riksstroke data with other national registers. Suicide attempts were identified by a record of hospital admission for intentional self-harm (ICD-10: X60-X84), and completed suicides were identified in the national Cause of Death Register. We used multiple Cox regression to analyze time from stroke onset to first suicide attempt.Results: We observed 220,336 stroke patients with a total follow-up time of 860,713 personyears. During follow-up, there were 1,217 suicide attempts, of which 260 were fatal. This was approximately double the rate of the general Swedish population. Patients with lower education or income (hazard ratio [HR] 1.37, 95% confidence interval [CI] 1.11-1.68) for primary vs university and patients living alone (HR 1.73, 95% CI 1.52-1.97) had an increased risk of attempted suicide, and patients born outside of Europe had a lower risk compared to patients of European origin. Male sex, young age, severe stroke, and poststroke depression were other factors associated with an increased risk of attempted suicide after stroke. The risk was highest during the first 2 years after stroke. Stroke patients with previous mood disorders and who have poststroke depression are at particular risk for suicidal thoughts.
Conclusions:1 Having had a stroke increases not only the risk of suicidal thoughts 1-3 but also the risk of suicide. [4][5][6] The suicide risk is particularly high in patients who are relatively young. 4,5 In the general population, suicide rates vary with socioeconomic factors such as civil status, education, and income.7 After a stroke, existential distress might be prominent 8 and add to the direct biological effects of brain injury to cause depression.9 A Portuguese study of 177 stroke patients found that suicidal thoughts were more common among patients with a low level of education, 3 but there are no previous studies on how suicide attempts or completed suicides relate to socioeconomic factors in stroke patients.We aimed to study how major socioeconomic factors (education, income, civil status, and country of birth) are associated with suicide attempts and completed suicides in patients who have had a stroke. We also explored other factors associated with suicide attempts, including the time after stroke at which suicide risk was the greatest and what methods were used in the suicide attempts.