Table 2.
Predictors of influenza in adult patients admitted to medical wards and ICUs, Toronto, 2007/8 influenza season
| Predictor | Univariable analysis | Multivariable analysis | ||
|---|---|---|---|---|
| Odds ratio (95% CI) | p-value | Odds ratio (95% CI) | p-value | |
| Age ≥65 years | 1.2 (0.9–1.6) | 0.1889 | ||
| Female gender | 1.1 (0.9–1.4) | 0.4470 | ||
| Residence in long-term care facility | 1.3 (0.9–1.8) | 0.1524 | ||
| Triage temperature ≥38.0°C | 3.8 (2.9–4.9) | <0.0001 | 3.1 (2.3–4.1) | <0.0001 |
| Respiratory symptoms in ED | 2.7 (2.0–3.7) | <0.0001 | 1.7 (1.2–2.4) | 0.0030 |
| Admission diagnosis | ||||
| Pneumonia/other respiratory infection | 2.5 (1.9–3.2) | <0.0001 | 1.8 (1.3–2.4) | 0.0006 |
| COPD/asthma/respiratory failure NOS | 2.1 (1.5–3.0) | <0.0001 | 2.3 (1.6–3.4) | <0.0001 |
| ICU admission | 0.7 (0.5–0.9) | 0.0057 | ||
| Week with >15% specimens positive | 4.1 (3.1–5.5) | <0.0001 | 4.2 (3.1–5.7) | <0.0001 |
Abbreviations: ED: emergency department; COPD: chronic obstructive pulmonary disease; NOS: not otherwise specified