Table 4.

Associations of mental disorders with after hours visits to PHERs, negative binominal regression analysis. Homeless persons staying in shelters in Helsinki metropolitan area, Finland, year 2008 (N = 158)

	Model 1		Model 2		Model 3
	IRR	95% CI	IRR	95% CI	IRR	95% CI
No mental disorder (ref.)	1		1		1
SUDs without other mental disorder	11.5	5.7–23.3	9.5	4.6–19.5	9.1	4.4–18.8
Mental disorder without SUDs	2.6	1.1–6.2	2.6	1.0–6.5	2.6	1.0–6.4
Dual diagnosis	14.1	6.3–31.2	11.7	5.3–25.9	11.5	5.1–25.6

ref. = reference group

Model 1: Crude model (Pseudo R2 = 0.05)

Model 2: Adjusted for age and gender (Pseudo R2 = 0.06)

Model 3: Adjusted for age, gender, and Charlson Comorbidity Index (Pseudo R2 = 0.06)