Unemployment and suicidal behavior in a New Zealand birth cohort: a fixed effects regression analysis.
This study examined the association between exposure to unemployment and suicidal behaviors (suicidal ideation and attempted suicide) in a birth cohort of New Zealand young adults using fixed-effects logistic and Poisson regression models. Data were gathered on unemployment and suicidal behaviors at annual periods from ages 16-25 years. At all ages increasing exposure to unemployment was associated with increased risks of suicidal ideation (p < .0001) and number of suicide attempts (p < .0001). Following adjustment for fixed effects and time-dynamic covariates, associations between unemployment and suicidal ideation reduced to marginal significance (p < .10), while the association between unemployment and suicide attempts was not statistically significant (p > .10). After adjustment, those experiencing 6 or more months of unemployment in a given year had odds of suicidal ideation that were 1.43 (95% CI: .96 to 2.16) times higher, and rates of suicide attempts that were 1.72 (95% CI: .89 to 3.32) times higher, than those who were not exposed to unemployment. Although unemployment was associated with moderate increases in risks of suicidal behaviors, much of this association was explained by confounding factors.
Fergusson
David M
DM
Christchurch Health and Development Study, Christchurch School of Medicine and Health Sciences, Christchurch, New Zealand. david.fergusson@chmeds.ac.nz
Boden
Joseph M
JM
Horwood
L John
LJ
D000293:Adolescent; D000328:Adult; D015331:Cohort Studies; D006801:Humans; D015994:Incidence; D009520:New Zealand / Q000453:epidemiology; D015995:Prevalence; D012044:Regression Analysis; D012307:Risk Factors; D013406:Suicide, Attempted / Q000706:statistics & numerical data*; D014478:Unemployment / Q000706:statistics & numerical data*