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Table 4 Comparison of adjusted mean values of functional and allergologic parameters by the distance classes in males and females.

From: Geographical information system and environmental epidemiology: a cross-sectional spatial analysis of the effects of traffic-related air pollution on population respiratory health

  Males Females
  Distance of residence to main road Distance of residence to main road
  <100 m 100-250 m 250-800 m <100 m 100-250 m 250-800 m
FEV1%§ 98.67 (n = 191) 96.76 (n = 217) 98.44 (n = 303) 99.67 (n = 183) 100.38 (n = 214) 98.13 (n = 294)
FVC%§ 101.02 (n = 191) 99.69 (n = 217) 99.06 (n = 303) 102.14 (n = 183) 101.31 (n = 214) 99.88 (n = 294)
FEV1/FVC%§ 78.39 ** (n = 191) 78.49 (n = 217) 79.82 (n = 303) 80.43 (n = 183) 82.36 (n = 214) 81.43 (n = 294)
FEV1/VC%§ 78.59 ** (n = 191) 78.33 (n = 217) 79.84 (n = 302) 80.69 (n = 183) 82.39 (n = 214) 81.80 (n = 294)
DLCO%§ 77.50 (n = 156) 78.87 (n = 170) 77.33 (n = 245) 74.56 (n = 141) 76.62 (n = 160) 74.87 (n = 229)
IgE_log 1.63 (n = 191) 1.62 (n = 206) 1.54 (n = 291) 1.40 (n = 205) 1.33 (n = 208) 1.35 (n = 308)
Bronchial reactivity slope_ln 1.84 (n = 129) 1.77 (n = 148) 1.75 (n = 203) 2.05 (n = 87) 1.99 (n = 114) 1.98 (n = 157)
  1. § Values are expressed in % predicted, with the exception of FEV1/FVC% and FEV1/VC% which are expressed in % observed
  2. *** p < 0.001, ** p < 0.01, * p < 0.05, # 0.05 < p < 0.1 (borderline) by analyses of variance; comparison between subjects living at different distances from the main road, separately in males and in females
  3. For all parameters mean values are adjusted for the effects of age and smoking habits, with the exception of the bronchial reactivity parameter where mean values are adjusted for age, smoking habits and predicted %FEV1