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Table 3 Risk factors for hospitalization at 18-month longitudinal follow-up

From: Risk factors for hospitalization among adults with asthma: the influence of sociodemographic factors and asthma severity

Risk factor Adjusted for all variables shown (OR [95% CI]) Adjusted for all variables, except asthma severity and health status (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)
  1. Multivariate analysis (n = 242). ED, emergency department; N/A, not applicable.