Table 4 Adjusted OR for pre-school asthma and school-age asthma, respectively, in relation to cumulative exposure before asthma onset (Unexposed as reference)

Age

OR

(95% CI)

OR

(95% CI)

OR

(95% CI)

Age

OR

(95% CI)

1y (n = 153)

1.97

(1.26–3.07)

1.93

(1.12–3.33)

1.95

(1.33–2.86)

1y (n = 169)

1.25

(0.87–1.80)

2y (n = 93)

2.07

(1.23–3.48)

1.42

(0.73–2.76)

1.82

(1.14–2.90)

2y (n = 169)

1.19

(0.83–1.69)

3y (n = 72)

1.93

(1.08–3.44)

1.26

(0.60–2.64)

1.68

(0.98–2.86)

3y (n = 169)

1.24

(0.87–1.77)

4y (n = 55)

1.25

(0.65–2.41)

1.07

(0.47–2.43)

1.19

(0.65–2.20)

4y (n = 169)

1.13

(0.78–1.65)

5y (n = 39)

1.19

(0.53–2.67)

1.01

(0.39–2.61)

1.13

(0.53–2.39)

5y (n = 169)

1.09

(0.72–1.64)

6y (n = 26)

0.81

(0.27–2.43)

1.21

(0.38–3.91)

0.94

(0.34–2.65)

6y (n = 169)

1.21

(0.73–2.00)