Table 5.
PM, PNC and CO2 concentrations in bedrooms with and without ETS. "None" is based on household survey; "Yes-Tracer" indicates ETS tracer was detected; "Yes-Survey" indicates indoor smoking may have occurred based on caregiver survey.
| ETS Present | N | Ave | SD | Med | 90th | p-valuea | |
|---|---|---|---|---|---|---|---|
| PM (µg/m3) | None | 93 | 25.3 | 19.8 | 18.8 | 53.6 | |
| Yes - Tracer | 22 | 40.3 | 30.8 | 30.6 | 86.0 | 0.005 | |
| Yes - Survey | 34 | 34.2 | 22.9 | 32.4 | 58.1 | 0.068 | |
| 0.3–1.0 µm PNC (#/liter) | None | 91 | 55,006 | 42,234 | 40,384 | 115,354 | |
| Yes - Tracer | 22 | 136,009 | 81,200 | 117,121 | 239,492 | <0.001 | |
| Yes - Survey | 31 | 111,563 | 80,016 | 84,612 | 197,548 | <0.001 | |
| 1–5 µm PNC (#/liter) | None | 91 | 1,317 | 1,315 | 907 | 2,549 | |
| Yes - Tracer | 22 | 2,109 | 1,518 | 1,693 | 3,960 | 0.010 | |
| Yes - Survey | 31 | 1,710 | 1,274 | 1,357 | 3,660 | 0.241 | |
| CO2 (ppm) | None | 100 | 1,126 | 458 | 995 | 1,789 | |
| Yes - Tracer | 23 | 1,237 | 500 | 1,180 | 1,874 | 0.305 | |
| Yes - Survey | 34 | 1,160 | 453 | 1,099 | 1,822 | 0.844 | |
a
p-value from independent-samples t-test.