Table 2.
Distribution of ambient criteria air pollution concentrations averaged across a 24-month period before the pulmonary tuberculosis (TB) diagnosis/entry into study for cases/matched controls nested within the 1996–2010 KPNC membership with available pollutant monitoring data.
| Air pollutant | n (%) with pollutant data | Percentile distribution | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Cases | Controls | Minimum | 20th | 40th | Median | 60th | 80th | Maximum | |
| Total population | |||||||||
| 24-hr PM2.5 (μg/m3) | 1,842 (79.8) | 3,661 (79.5) | 0.1408 | 8.5600 | 9.1840 | 9.6268 | 10.3324 | 11.6602 | 26.4783 |
| 24-hr PM10 (μg/m3) | 2,309 (100.0) | 4,604 (100.0) | 9.1000 | 18.3896 | 19.8733 | 20.6067 | 21.6487 | 24.4700 | 56.6082 |
| 24-hr SO2 (ppm) | 2,248 (97.4) | 4,439 (96.4) | 0.0001 | 0.0009 | 0.0011 | 0.0012 | 0.0013 | 0.0018 | 0.0039 |
| 24-hr NO2 (ppm) | 2,309 (100.0) | 4,601 (99.9) | 0.0003 | 0.0098 | 0.0133 | 0.0144 | 0.0151 | 0.0177 | 0.0390 |
| 8-hr O3 (ppm) | 2,309 (100.0) | 4,604 (100.0) | 0.0178 | 0.0279 | 0.0301 | 0.0315 | 0.0330 | 0.0378 | 0.0670 |
| 8-hr CO (ppm) | 2,309 (100.0) | 4,598 (99.9) | 0.0983 | 0.5481 | 0.6793 | 0.7656 | 0.8760 | 1.1114 | 3.0572 |
| Ever smokers | |||||||||
| 24-hr PM2.5 (μg/m3) | 617 (83.7) | 1,044 (80.9) | 0.1408 | 8.5701 | 9.2355 | 9.6085 | 10.3507 | 11.7043 | 21.9646 |
| 24-hr PM10 (μg/m3) | 737 (100.0) | 1,291 (100.0) | 9.1000 | 18.3547 | 19.8007 | 20.5427 | 21.5647 | 24.4560 | 48.6473 |
| 24-hr SO2 (ppm) | 716 (97.2) | 1,249 (96.8) | 0.0001 | 0.0008 | 0.0011 | 0.0012 | 0.0013 | 0.0018 | 0.0038 |
| 24-hr NO2 (ppm) | 737 (100.0) | 1,291 (100.0) | 0.0003 | 0.0100 | 0.0133 | 0.0142 | 0.0149 | 0.0174 | 0.0339 |
| 8-hr O3 (ppm) | 737 (100.0) | 1,291 (100.0) | 0.0178 | 0.0279 | 0.0300 | 0.0315 | 0.0331 | 0.0382 | 0.0670 |
| 8-hr CO (ppm) | 737 (100.0) | 1,289 (99.9) | 0.0983 | 0.5276 | 0.6628 | 0.7441 | 0.8447 | 1.0882 | 1.9490 |
| Never smokers | |||||||||
| 24-hr PM2.5 (μg/m3) | 1,225 (77.9) | 2,617 (79.0) | 0.1408 | 8.5589 | 9.1735 | 9.6268 | 10.3206 | 11.6480 | 26.4783 |
| 24-hr PM10 (μg/m3) | 1,572 (100.0) | 3,313 (100.0) | 10.3973 | 18.4381 | 19.8920 | 20.6708 | 21.7093 | 24.5191 | 58.6082 |
| 24-hr SO2 (ppm) | 1,532 (97.5) | 3,190 (96.3) | 0.0000 | 0.0009 | 0.0011 | 0.0012 | 0.0012 | 0.0018 | 0.0039 |
| 24-hr NO2 (ppm) | 1,572 (100.0) | 3,310 (99.9) | 0.0003 | 0.0098 | 0.0134 | 0.0144 | 0.0152 | 0.0178 | 0.0390 |
| 8-hr O3 (ppm) | 1,572 (100.0) | 3,313 (100.0) | 0.0182 | 0.0279 | 0.0301 | 0.0315 | 0.0330 | 0.0377 | 0.0670 |
| 8-hr CO (ppm) | 1,572 (100.0) | 3,309 (99.9) | 0.2430 | 0.5537 | 0.6860 | 0.7805 | 0.8877 | 1.1213 | 3.0572 |