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.

Eisner et al. Respiratory Research 2001 2:53   doi:10.1186/rr37