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Table 4 In utero and first year of life exposures to air pollutants sources in the children of the EDEN study population according to gender

From: Modifiable exposures to air pollutants related to asthma phenotypes in the first year of life in children of the EDEN mother-child cohort study

Variables All (N = 1765) Boys (n = 918) Girls (n = 847) P *
  n (%) n (%) n (%)  
In utero life        
Prenatal maternal smoking 450 25.50 228 24.84 222 26.21 0.48
Traffic-related air pollution 501 28.39 246 26.80 255 30.11 0.10
First year of life        
Heavy parental smoking in the last 12 months 227 12.86 113 12.31 114 13.46 0.75
Traffic-related air pollution in the last 12 months 372 21.08 201 21.90 171 20.19 0.61
Dampness in the last 12 months 86 4.87 46 5.01 40 4.72 0.90
Visible moulds in the last 12 months 76 4.31 41 4.47 35 4.13 0.84
Bleaching agents in the last 12 months 102 5.78 50 5.45 52 6.14 0.46
House dust mites in the last 12 months 209 11.84 117 12.75 92 10.86 0.29
Cats in the past 12 months 156 8.84 79 8.61 77 9.09 0.75
Dogs in the past 12 months 117 6.63 65 7.08 52 6.14 0.45
Domestic heating in the last 12 months        
  Electricity 353 20.00 187 20.37 166 19.60 0.24
  Gas 736 41.70 383 41.72 353 41.68  
  Petroleum 314 17.79 160 17.43 154 18.18  
  Wood 79 4.48 47 5.12 32 3.78  
  Others 45 2.55 30 3.27 15 1.77  
  1. * P, the P-value for chi-square test between boys and girls.