Table 4. Survival models of the associations between number of prior DSM-IV disorders and a subsequent suicide attempt—developed countries.

	Response Variable: Lifetime Attempt among Part II Sample (n = 27,963)
	Bivariate Modelsa	Multivariate Interactive Modelb
Number of DSM-IV Disorders	OR (95% CI)	OR (95% CI)
Exactly 1	3.9 (3.2–4.7)*	—
Exactly 2	7.4 (6.0–9.1)*	1.1 (0.8–1.7)
Exactly 3	14.2 (10.9–18.3)*	1.0 (0.5–1.8)
Exactly 4	16.6 (12.6–21.8)*	0.5 (0.2–1.0)
Exactly 5	17.9 (12.7–25.4)*	0.2 (0.1–0.6)*
≥6	28.2 (20.3–39.3)*	0.1 (0.0–0.2)*
χ2 (p-value)c	798.4 (<0.001)*	113.5 (<0.001)*

^aBivariate discrete time survival models include the following covariates: age, age-squared, age cohort, sex, and person-year.

^bMultivariate interactive model (includes number of disorders and individual DSM-IV/CIDI disorders together in a discrete time survival model) includes the following covariates: age, age-squared, age cohorts, sex, and person-year.

^cThe group effect χ² tests the set of coefficients for number of disorders for significance, while the individual χ² only test presence versus absence of each specific number of disorders.

*: Significant at the 0.05 level, two-sided test.