TABLE 4.
Exposures to Tobacco and Indoor Particles, According to Group Assignment, During Study
| Characteristic | Baseline | 6 mo | 12 mo | P |
|---|---|---|---|---|
| Serum cotinine level, mean, ng/mL | .738 | |||
| Intervention group (n = 110) | 1.1 | 1.1 | 1.1 | |
| Control group (n = 115) | 1.2 | 1.1 | 1.0 | |
| Hair cotinine level, mean, ng/mg | .984 | |||
| Intervention group (n = 110) | 0.1 | 0.12 | 0.15 | |
| Control group (n = 115) | 0.1 | 0.11 | 0.15 | |
| Air nicotine level, μg | .191 | |||
| Intervention group (n = 110) | — | 3.1 | 2.5 | |
| Control group (n = 115) | — | 2.5 | 2.7 | |
| No. of particles of >0.3 μm, mean ± SD, 106/ft3 | .026a | |||
| Intervention group (n = 110) | 4.0 | 2.5 | 3.0 | |
| Control group (n = 115) | 4.7 | 4.6 | 4.4 | |
| No. of particles of >5 μm, mean ± SD, 106/ft3 | .219a | |||
| Intervention group (n = 110) | 0.0033 | 0.0029 | 0.0027 | |
| Control group (n = 115) | 0.0037 | 0.0028 | 0.0024 |
a
Test of differences in group means, including baseline particle levels.