Table 5.

Adjusted^a percent and relative risk (ARR) of outcomes due to wheezing among children with asthma 6-11 years of age, by ETS exposure among children with serum cotinine levels <1.0 ng/mL, United States, 2003-2010

	Lowb exposure (adjusted %) (n=161)	Unexposedc (adjusted %) (n=137)	Low exposure vs. unexposed ARR (95% CI)
Missed school days past 12m
0 days	42.8	64.9	0.7 (0.5, 1.0)*
1-7 days	42.3	28.5	1.5 (1.1, 2.0)*
8+ days	15.0	6.7	2.3 (1.2, 4.4)*
Healthcare visits past 12m for wheezing
No visits	43.4	56.9	0.8 (0.6, 1.0)
1-2 visits	37.1	30.7	1.2 (1.0, 1.5)
3+ visits	19.5	12.4	1.6 (0.9, 2.7)
Nights w/disturbed sleep past 12m
None	42.7	69.3	0.6 (0.5, 0.8)*
<1 night per week	27.5	18.4	1.5 (1.2, 1.9)*
1+ nights per week	29.8	12.3	2.4 (1.5, 3.9)*
Activity limitation past 12m
None	48.9	72.0	0.7 (0.5, 0.9)*
A little	33.2	20.5	1.6 (1.1, 2.4)*
Fair/moderate amount/a lot	17.9	7.5	2.4 (1.3, 4.5)*
Wheezing during exercise past 12m
No	43.2	69.2	0.6 (0.5, 0.8)*
Yes	56.8	30.8	1.8 (1.3, 2.7)*

Only results for children ages 6-11 years are shown--all 95% CI for children 12-19 years included 1.0. Conditional marginal proportions (adjusted percent) and ARRs were estimated using ordinal regression models for the ordered levels of the outcome variables..

^aAdjusted for sex, race/ethnicity, poverty status, home ownership and household size.

^bLow ETS exposure defined as serum cotinine levels 0.05 ng/mL - <1.0 ng/mL.

^cNo ETS exposure defined as serum cotinine levels <0.05 ng/mL.

^*95% confidence interval excluded 1.0 prior to rounding.