Table 1.

Percent of Children 2 Months to 5 Years of Age With Respiratory Outcomes by ETS Exposure

Household Exposure: Number of Cigarettes Smoked in the Home per DaySmoking During
Pregnancy
None1–19a≥20bNoYesc
Diagnosed asthma 5.1  (4743)5.7  (2006)9.2**  (929)5.1  (6114)8.3**  (1564)
Chronic bronchitis 3.0  (4743)3.9  (2006)5.6*  (929)3.2  (6114)4.8*  (1564)
In the last 12 months
 Three or more episodes of wheezing 7.5  (4734)10.6**  (2004)12.6*  (928)7.8  (6105)12.8**  (1561)
 Three or more episodes of cough 14.4  (4731)14.7  (2002)13.8  (928)14.0  (6101)15.6  (1560)
 Three or more episodes of upper respiratory infection40.1  (4742)36.0  (2000)33.3*  (929)38.4  (6111)37.3  (1560)
 One or more episodes of pneumonia3.0  (4745)3.8  (2006)4.2  (929)3.3  (6116)3.7  (1564)
  • a Contrast, 1–19 vs zero.b Contrast, ≥20 vs zero.c Contrast, yes vs no.

    0 = Sample size;

  • * P < .05;

  • ** P < .01.