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Table 2 Univariate and multivariate conditional logistic regression analyses of potential risk factors for consulting the general practitioner with an acute respiratory tract infections.

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 168/283 (59) 218/283 (77) 1 1
   Yes 115/283 (41) 65/283 (23) 2.32 [1.58–3.39] 1.91 [0.96–3.78]
Exposure to respiratory complaints outside household     
   No 112/330 (34) 208/330 (63) 1 1
   Maybe 87/330 (26) 47/330 (41) 3.40 [2.17–5.37] 3.85 [1.66–8.93]
   Yes 131/330 (40) 75/330 (23) 3.50 [2.31–5.29] 3.65 [1.70–7.84]
Number of children in household     
   0 166/340 (49) 184/340 (54) 1 1
   ≥1 174/340 (51) 156/340 (46) 1.37 [0.95–1.98] 1.42 [0.51–3.95]
Children in primary school     
   No 137/220 (62) 151/220 (69) 1 1
   Yes 83/220 (38) 69/220 (31) 1.52 [0.93–2.47] 1.12 [0.43–2.91]
Children in secondary education     
   No 166/217 (76) 153/217 (71) 1 1
   Yes 51/217 (24) 64/217 (29) 0.67 [0.41–1.10] 0.32 [0.13–0.77]
Dampness or mould at home     
   No 266/313 (85) 244/313 (78) 1 1
   Yes 47/313 (15) 69/313 (22) 0.63 [0.42–0.95] 0.48 [0.23–1.00]
Mechanical ventilation system     
   No 138/333 (41) 163/333 (49) 1 1
   Yes 195/333 (59) 170/333 (51) 1.36 [1.00–1.86] 1.31 [0.75–2.27]
Smoking by participant     
   No 180/354 (51) 184/354 (52) 1 1
   In past 85/354 (24) 78/354 (22) 1.14 [0.75–1.74] 1.25 [0.56–2.80]
   Yes 89/354 (25) 92/354 (26) 1.00 [0.67–1.49] 0.91 [0.40–2.07]
Exposure to passive smoking     
   No 230/355 (65) 221/355 (62) 1 1
   Yes 125/355 (35) 134/355 (38) 0.89 [0.65–1.22] 0.56 [0.27–1.13]
  1. # GP = general practitioner
  2. ## ARTI = acute respiratory tract infections
  3. * OR = odds ratio; CI = confidence interval
  4. ** adjusted for all variables and sex