Risk factor | Adults | Â | Children | Â |
---|---|---|---|---|
 | Category | Odds Ratio (95% CI) | Category | Odds Ratio (95% CI) |
Age group | 16-24 yrs | 1 | 2-4 yrs | 1 |
 | 25-34 yrs | 1.13 (0.52-2.49) | 5-8 yrs | 0.65 (0.28-1.54) |
 | 35-44 yrs | 2.04 (0.92-4.54) | 9-12 yrs | 0.43 (0.17-1.08) |
 | 45-54 yrs | 1.90 (0.83-4.34) | 13-15 yrs | 0.13 (0.03-0.56) |
 | ≥55 yrs | 2.19 (0.88-5.50) |  |  |
Sex | Female | 1 | n/a | Â |
 | Male | 2.21 (1.31-3.73) |  |  |
Chest infection in previous month | No | 1 | n/a | Â |
 | Yes | 1.62 (0.98-2.67) |  |  |
Runny nose in previous week | No | 1 | No | 1 |
 | Yes | 1.66 (1.05-2.64) | Yes | 1.80 (0.98-3.29) |
Frequency sitting at an outside fire | Never/monthly | 1 | n/a | Â |
 | Most days/weekly | 1.23 (0.74-2.05) |  |  |
 | Every day | 6.89 (1.87-25.4) |  |  |
H. influenzae detected | No | 1 | No | 1 |
 | Yes | 6.74 (4.06-11.2) | Yes | 9.34 (4.71-18.5) |
M. catarrhalis detected | No | 1 | No | 1 |
 | Yes | 3.27 (1.97-5.45) | Yes | 2.67 (1.34-5.33) |