Table 2 Prenatal SHS exposure by measuring cotinine in cord blood

Non exposure

< 1

10.8

56.9 1.18 (1.11-1.26)

** 1.14 (1.06-1.22)

** 73.4 1.20 (0.97-1.48)

1.22 (0.96-1.55)

Low exposure

1-14

54.9

19.8 0.88 (0.82-0.93)

** 0.86 (0.80-0.92)

** 12.1 0.93 (0.73-1.20)

0.99 (0.75-1.31)

Medium exposure

14-50

9.4

11.0 1

1

8.2

1

1

High exposure

50-100

7.5

8.8 1.00 (0.93-1.08)

1.01 (0.93-1.10)

3.9

0.84 (0.60-1.16)

0.83 (0.56-1.23)

Very high exposure

> 100

17.3

3.5 0.82 (0.75-0.90)

** 0.83 (0.76-0.91)

** 2.4

0.97 (0.64-1.46)

0.99 (0.64-1.55)