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Table 1 Number of children with allergic rhinitis, and prevalence of allergic rhinitis with 95% confidence interval (95% CI) by selected covariates in Taiwan 2001.

From: Relation between air pollution and allergic rhinitis in Taiwanese schoolchildren

Determinant

No. of children

No. of physician- diagnosis allergic rhinitis

Prevalence (P%)

OR (95% CI)

Total

32,143

8,202

25.5

 

Age (years)

    

< = 7

4,589

1,255

27.3

1.46 (1.30–1.65)

8

3,483

987

28.3

1.54 (1.36–1.74)

9

3,495

972

27.8

1.50 (1.32–1.70)

10

3,695

1,006

27.2

1.45 (1.29–1.65)

11

3,478

931

26.8

1.42 (1.25–1.61)

12

3,749

886

23.6

1.20 (1.06–1.36)

13

3,697

867

23.5

1.19 (1.05–1.35)

14

3,611

818

22.7

1.14 (1.00–1.29)

15

2,346

480

20.5

1.00

Gender

    

Male

16,277

4,970

30.5

1.72 (1.63–1.81)

Female

15,866

3,232

20.4

1.00

Parental education (years)

    

<6

1,789

267

14.9

1.00

6–8

5,603

1,056

18.8

1.32 (1.14–1.53)

9–11

14,492

3,643

25.1

1.91 (1.67–2.19)

> = 12

10,259

3,236

31.5

2.63 (2.29–3.01)

Parental atopy

    

Yes

9,143

4,356

47.6

4.59 (4.35–4.85)

No

22,499

3,721

16.5

1.00

Environmental tobacco smoke§

    

Yes

18,861

4,512

23.9

0.82 (0.78–0.86)

No

13,053

3,632

27.8

1.00

Maternal smoking during pregnancy§

    

Yes

689

140

20.3

0.74 (0.61–0.89)

No

31,292

8,027

25.7

1.00

Cockroaches noted monthly§

    

Yes

25,113

6,557

26.1

1.09 (0.99–1.20)

No

6,548

1,547

23.6

1.00

Water damage§

    

Yes

2,614

629

24.1

0.92 (0.84–1.01)

No

29,383

7,547

25.7

1.00

Visible mould§

    

Yes

7,469

2,258

30.2

1.37 (1.29–1.45)

No

23,923

5,764

24.1

1.00

  1. §Numbers of subjects do not add up to total N because of missing data.