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Table 1 Prevalence of asthma ever, non-atopy related asthma ever without hayfever ever, and hayfever ever

From: Spatial analysis of air pollution and childhood asthma in Hamilton, Canada: comparing exposure methods in sensitive subgroups

  

Asthma

Asthma without hayfever

Hayfever

 

N

n

%

n

%

n

%

All children

1467

261

18

185

13

220

15

Girls

729

106

15

76

10

101

14

Boys

738

155

21

109

15

119

16

Younger children

918

115

13

123

13

90

10

Older children

549

106

19

62

11

130

24

Younger girls

465

58

12

47

10

38

8

Younger boys

453

97

21

76

17

52

11

Older girls

264

48

18

29

11

63

24

Older boys

285

58

20

33

12

67

24