Table 2.
—Objective and Subjective Symptoms of Asthma
| Nonsmokers/No Household ETS Exposurea (n = 1,011) | Nonsmokers/Household ETS Exposure (n = 790) | Smokers (n = 408) | P Valueb | |
| Total symptomatic days, mean ± SD | 69.3 ± 63.0 | 63.5 ± 59.5 | 78.8 ± 66.9 | < .001 |
| Total nights sleep disturbance, mean ± SD | 39.2 ± 50.5 | 36.5 ± 50.8 | 48.4 ± 59.0 | < .001 |
| Total days restricted activity, mean ± SD | 23.4 ± 40.1 | 21.8 ± 39.0 | 26.8 ± 41.8 | .006 |
| Asthma exacerbation during study, n (%) | 219 (23) | 146 (19) | 68 (17) | .062 |
| Hospitalization, n (%) | 54 (6) | 43 (6) | 16 (4) | .485 |
| Percentage predicted FEV1 at baseline, mean ± SD | 93.4 ± 14.1 | 94.0 ± 14.7 | 92.6 ± 13.9 | .296 |
| Percentage predicted FEV1 < 80% across pregnancy, n (%) | 174 (17) | 128 (16) | 70 (17) | .836 |
See Table 1 for expansion of the abbreviation.
a
Data unavailable for one patient.
b
Kruskal-Wallis and Pearson χ2 tests used to assess the hypothesis that there is no difference between the three smoking categories.