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Table 3 Uni- and multivariate conditional logistic regression analyses of potential risk factors for an acute respiratory tract infections with ≥1 detected pathogen.

From: Risk factors for acute respiratory tract infections in general practitioner patients in The Netherlands: a case-control study

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     
   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     
   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     
   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     
   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     
   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     
   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     
   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     
   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]
  1. # GP = general practitioner
  2. ## ARTI = acute respiratory tract infections
  3. * OR = odds ratio; CI = confidence interval
  4. ** adjusted for all variables and sex