Table 3.

Risk factors for hospitalization at 18-month longitudinal follow-up

		Adjusted for all variables, except
	Adjusted for all variables shown	asthma severity and health status
Risk factor	(OR [95% CI])	(OR [95% CI])
Demographic characteristics and smoking
Age (per 10 years)	1.2 (0.7–2.4)	1.2 (0.7–2.1)
Female gender	1.5 (0.5–4.6)	1.2 (0.5–2.8)
Non-white race (non-Hispanic)	3.1 (1.1–8.8)	1.9 (0.9–4.3)
Education (years)	0.8 (0.6–1.1)	0.9 (0.7–1.1)
Household income (per $10,000 decrement)	1.1 (0.9–1.3)	1.2 (1.02–1.4)
Current cigarette smoking	1.4 (0.2–7.9)	1.2 (0.3–4.6)
Past cigarette smoking	0.7 (0.2–2.0)	1.4 (0.6–3.3)
Asthma severity
Severity-of-asthma score (per 5 points)	3.4 (1.7–6.8)	N/A
Recent hospitalizations for asthma	8.3 (2.1–33.4)	N/A
Remote hospitalizations for asthma	2.7 (0.6–11.5)	N/A
Other asthma clinical factors
Atopic history	0.7 (0.2–2.3)	0.5 (0.2–1.4)
Aspirin allergy history	0.7 (0.2–2.3)	1.7 (0.6–4.6)
Gastric acid suppression medication (in prior 12 months)	0.7 (0.2–2.0)	2.2 (1.0–4.9)
Health status
SF-36 Physical component score	0.98 (0.94–1.03)	N/A
SF-36 Mental component score	0.97 (0.92–1.02)	N/A
Health care access
Reliance on ED for urgent care	3.2 (1.0–9.8)	2.3 (1.0–5.7)

Multivariate analysis (n = 242). ED, emergency department; N/A, not applicable.