Table 1– Distribution of gas cooking, gender, age, and atopy within the participating study groups
Study centreNorth America#AustriaGermanyThe NetherlandsPolandHungaryCzech RepublicSlovakiaTotalTotal %
Gas cooking
 Yes3139 (24.6)264 (9.1)781 (43.7)1,435 (82.7)1,349 (91.6)1,143 (70.9)746 (92.6)926 (95.5)978340.73
 No9490 (74.5)2551 (88)960 (53.7)272 (15.7)106 (7.2)417 (25.9)47 (5.8)44 (4.5)1388757.82
 Missing10883472817531303491.45
Male sex %51.0453.2850.4549.5749.3247.6156.4553.51
Age distribution %
 6–8 yrs86.7519.5710.32
 9–10 yrs30.3412.9736.8639.8828.336.9412.0316.8
 11–12 yrs69.660.2843.5749.871.6793.0687.9783.2
Atopy %20.714.794.6515.6414.2712.6919.4413.96
Total127372898178817351472161380697024019100
References2024252623232323
  • #: Data from the USA (18 communities, ∼80% of the children) and Canada (six communities) combined in one single entry. : For Germany, no data were available for the question regarding “allergic to things inhaled?”; therefore, the “percentage of children with hay fever” is given instead.