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Table 2 Risk factors for hospitalization over longitudinal follow-up: clinical factors, asthma severity, health status, and health care access

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

Risk factor Baseline interview (mean [SD] or n [%]) Risk of hospitalization at 18 months (OR [95% CI])
Asthma severity   
   Severity-of-asthma score (per 5 points) 11.1 (4.8) 4.7 (2.9–7.7)
   Recent hospitalizations for asthma* 60 (25%) 11.6 (5.3–25.2)
   Remote hospitalizations for asthma 64 (26%) 0.7 (0.3–1.6)
Other asthma clinical factors   
   Childhood onset (before 18 years) 117 (48%) 1.0 (0.5–2.0)
   Atopic history 199 (82%) 0.5 (0.2–1.1)
   Aspirin allergy history 32 (13%) 2.3 (1.0–5.6)
   Gastric acid suppression medication (in prior 12 months) 62 (26%) 2.7 (1.3–5.5)
Generic health status   
   SF-36 Physical component score (per 1 point) 43.1 (12.0) 0.94 (0.91–0.97)
   SF-36 Mental component score (per 1 point) 44.3 (9.2) 0.96 (0.93–1.0)
Health care access   
   Deductable for physician office visits 76 (31%) 1.0 (0.5–2.0)
   Reliance on ED for urgent asthma care 39 (16%) 2.5 (1.1–5.5)
  1. Bivariate analysis (n = 242). ED, emergency department. *Recent hospitalizations, hospitalization during 12 months prior to baseline interview or 18 months prior to 18-month follow-up interview. Remote hospitalizations, hospitalization more than 12 months prior to baseline interview.