Multivariable analysis: Patient characteristics independently predictive of severe outcomes in pandemic influenza during the 2009–2010 pandemic (n=1520)
| Patient characteristic | Adjusted* OR (95% CI) | p Value |
| Socio-demographic characteristics | ||
| Age (years) | ||
| <1 | 1.60 (0.88 to 2.90) | 0.123 |
| 1–4 | 1.20 (0.66 to 2.19) | 0.545 |
| 5–15 | 0.91 (0.52 to 1.59) | 0.740 |
| 16–24 | 1.00 (reference) – | |
| 25–34 | 1.60 (0.96 to 2.66) | 0.071 |
| 35–44 | 1.47 (0.86 to 2.52) | 0.164 |
| 45–54 | 1.46 (0.84 to 2.56) | 0.183 |
| 55–64 | 2.08 (1.16 to 3.74) | 0.014 |
| ≥65 | 1.45 (0.71 to 2.93) | 0.308 |
| Underlying comorbidities | ||
| Asthma | 0.49 (0.34 to 0.70) | <0.001 |
| Cardiovascular disease | 1.43 (0.96 to 2.13) | 0.075 |
| Other lung disease excluding COPD and asthma | 2.40 (1.17 to 4.93) | 0.018 |
| Neurological disorders | 2.59 (1.62 to 4.15) | <0.001 |
| Recorded obesity | 2.22 (1.18 to 4.18) | 0.013 |
↵* Each variable has been adjusted for all other variables in the model.
COPD, chronic obstructive pulmonary disease.