Skip to main content

Table 1 Prevalence (%) of conditions, risk factors and exposure to vehicle traffic.

From: Heavy vehicle traffic is related to wheeze among schoolchildren: a population-based study in an area with low traffic flows

   Prevalence
% (n)
Conditions Current wheeze 11.2 (152)
  Ever wheeze 22.2 (301)
  Physician-diagnosed asthma 5.7 (78)
  Allergic rhinitis 14.8 (201)
  Allergic sensitization 26.9 (365)
  Allergic sensitization to any pollen 16.7 (227)
Risk factors Parental asthma 22.5 (305)
  Parental smoking 21.4 (291)
  Home dampness 12.2 (166)
Traffic exposure ≥500 heavy vehiclesa 11.7 (159)
  ≥250 heavy vehiclesa 20.8 (282)
  ≥100 heavy vehiclesa 31.5 (428)
  ≥4000 vehiclesb 22.9 (311)
  ≥8000 vehiclesb 15.1 (205)
  Self-reported exposurec 30.1 (408)
  1. a Number of heavy vehicles daily within 200 meters from the home (Heavy traffic)
  2. b Total number of vehicles daily within 200 meters from the home (Total traffic)
  3. c A large busy road or a very frequented bus stop within 200 meters of the home