Table 3.
Participant characteristic and seasonal associations with ARI during 2013–2016 influenza seasons: Adjusted Cox proportional hazards model.
| Adjusted Hazard Ratio (95% Confidence Interval) |
|||
|---|---|---|---|
| Variablea | Influenzab | Non-influenza respiratory pathogenb | Symptoms without pathogen detectedb |
| Age, years | |||
| ≤4 | 1.68 (0.62, 4.59) | 4.8 (2.88, 7.99) | 1.27 (0.81, 1.99) |
| 5–17 | 1.12 (0.44, 2.86) | 1.61 (0.98, 2.66) | 0.68 (0.45, 1.02) |
| 18–49 | 0.9 (0.32, 2.60) | 0.99 (0.56, 1.74) | 0.71 (0.45, 1.12) |
| ≥50 | – | – | – |
| Male | 1.03 (0.67, 1.60) | 0.97 (0.8, 1.17) | 0.87 (0.69, 1.10) |
| Chronic respiratory condition | 0.87 (0.45, 1.70) | 1.46 (1.14, 1.87) | 1.55 (1.16, 2.09) |
| Season | |||
| Autumn | – | – | – |
| Winter | 8.83 (3.75, 20.80) | 1.06 (0.82, 1.38) | 1.23 (0.9, 1.67) |
| Spring | 9.33 (3.91, 22.27) | 1.18 (0.91, 1.55) | 1.5 (1.1, 2.03) |
Statistically significant estimates are in bold text.
a
Reference categories: age ≥50, female gender, no chronic respiratory condition, autumn season.
b
Estimates for influenza and non-influenza respiratory pathogen used model with the 14-day risk period; for symptoms without pathogen detected used model with the 2-day risk period.