Table 5. Multivariate analysis of risk factors for asthma-related healthcare use: Presence of hospitalizations.
| Variable | Unadjusted | Adjusted1 | ||||||
| OR | 95% CI | p | OR | 95% CI | p | |||
| Age (per year) | 1.03 | 1.02 | 1.05 | <0.001 | 1.03 | 1.01 | 1.06 | 0.021 |
| Sex (female) | 1.34 | 0.83 | 2.17 | 0.233 | 1.84 | 0.89 | 3.83 | 0.101 |
| Duration of asthma (per year) | 1.02 | 1.00 | 1.04 | 0.020 | ||||
| BMI (per kg/m2) | 1.02 | 0.95 | 1.09 | 0.683 | ||||
| History of exacerbation (presence) | 2.40 | 1.48 | 3.88 | <0.001 | 2.01 | 0.99 | 4.10 | 0.055 |
| Rhinosinusitis (presence) | 0.67 | 0.40 | 1.12 | 0.124 | 0.64 | 0.31 | 1.31 | 0.222 |
| Family history of allergy disease (presence) | 1.01 | 0.63 | 1.62 | 0.978 | ||||
| Smoking (≥10 pack-years) | 1.09 | 0.63 | 1.88 | 0.77 | ||||
| FEV1 (per predicted %) | 0.98 | 0.97 | 0.99 | 0.0003 | 0.99 | 0.97 | 1.01 | 0.174 |
| BDR (presence) | 1.20 | 0.60 | 2.39 | 0.604 | ||||
| Blood eosinophilia (per % of total WBC) | 0.98 | 0.92 | 1.04 | 0.461 | ||||
| Atopy (presence) | 0.93 | 0.47 | 1.83 | 0.825 | ||||
| Follow-up (maintained in the cohort) | 1.05 | 0.64 | 1.73 | 0.843 | ||||
| Log IgE | 0.84 | 0.50 | 1.38 | 0.483 | ||||
| ACT score variability | 1.32 | 1.15 | 1.52 | <0.001 | 1.31 | 1.11 | 1.55 | 0.002 |
| Inhaler compliance score | 1.02 | 1.00 | 1.03 | 0.062 | 1.00 | 0.99 | 1.02 | 0.723 |
1
Adjusted for age, sex, and variables that had a p-value <0.1 in the unadjusted model.
Abbreviations: WBC, white blood cell; BMI, Body mass index.