Table 3 Uni- and multivariate conditional logistic regression analyses of potential risk factors for an acute respiratory tract infections with ≥1 detected pathogen.
Potential risk factor | Case patients n/N (%) | Control patients n/N(%) | Crude OR* [95%CI]* | Adjusted OR** [95%CI] |
|---|---|---|---|---|
Exposure to respiratory complaints within household | Â | Â | Â | Â |
   No | 100/173 (58) | 133/173 (77) | 1 | 1 |
   Yes | 73/173 (42) | 40/173 (23) | 2.43 [1.50–3.96] | 1.51 [0.80–2.82] |
Exposure to respiratory complaints outside household | Â | Â | Â | Â |
   No | 70/204 (34) | 125/204 (61) | 1 | 1 |
   Maybe | 56/204 (28) | 28/204 (14) | 3.46 [1.96–6.10] | 3.49 [1.59–7.79] |
   Yes | 78/204 (38) | 51/204 (25) | 3.15 [1.83–5.41] | 2.45 [1.19–5.04] |
Number of adults in household | Â | Â | Â | Â |
   1 | 18/215 (8) | 32/215 (15) | 1 | 1 |
   ≥2 | 197/215 (92) | 183/215 (85) | 1.82 [1.01–3.29] | 1.38 [0.51–3.72] |
Number of children in household | Â | Â | Â | Â |
   0 | 98/216 (45) | 116/216 (54) | 1 | 1 |
   ≥1 | 118/216 (55) | 100/216 (46) | 1.69 [1.04–2.75] | 0.97 [0.47–1.98] |
Dampness or mould at home | Â | Â | Â | Â |
   No | 163/194 (84) | 150/194 (77) | 1 | 1 |
   Yes | 31/194 (16) | 44/194 (23) | 0.67 [0.41–1.09] | 0.60 [0.31–1.18] |
Mechanical ventilation system | Â | Â | Â | Â |
   No | 84/208 (40) | 107/208 (51) | 1 | 1 |
   Yes | 124/208 (49) | 101/208 (49) | 1.59 [1.06–2.37] | 1.25 [0.72–2.17] |
Smoking by participant | Â | Â | Â | Â |
   No | 118/223 (53) | 123/223 (55) | 1 | 1 |
   In past | 51/233 (23) | 46/223 (21) | 1.20 [0.71–2.03] | 0.81 [0.37–1.74] |
   Yes | 54/223 (24) | 54/223 (24) | 1.08 [0.65–1.79] | 0.79 [0.34–1.86] |
Exposure to passive smoking | Â | Â | Â | Â |
   No | 137/222 (62) | 135/222 (61) | 1 | 1 |
   Yes | 85/222 (38) | 87/222 (39) | 0.96 [0.66–1.41] | 0.89 [0.50–1.59] |