Table 4.
Total house-dust PAH concentrations for 583 households by covariates of interest.
| Variable | Category | N | Percentage | Concentration (ng PAH/g dust) |
||
|---|---|---|---|---|---|---|
| Median | 25th Percentile | 75th Percentile | ||||
| Residence age | 1990–present | 162 | 28 | 362 | 254 | 510 |
| 1985–1989 | 38 | 7 | 383 | 284 | 537 | |
| 1980–1984 | 29 | 5 | 469 | 350 | 622 | |
| 1970–1979 | 76 | 13 | 592 | 390 | 972 | |
| 1960–1969 | 60 | 10 | 566 | 371 | 935 | |
| 1950–1959 | 69 | 12 | 601 | 417 | 963 | |
| 1940–1949 | 45 | 8 | 620 | 395 | 900 | |
| 1939–earlier | 34 | 6 | 570 | 439 | 924 | |
| Unknown | 70 | 12 | 522 | 347 | 944 | |
| Gas heating | Present | 407 | 70 | 521 | 339 | 839 |
| Absent | 171 | 29 | 402 | 286 | 639 | |
| Unknown or missing | 5 | 1 | 374 | 347 | 479 | |
| Residence type | Single family home | 488 | 84 | 472 | 308 | 753 |
| Duplex or townhouse | 36 | 6 | 584 | 386 | 1049 | |
| Apartment or condominium | 47 | 8 | 538 | 371 | 903 | |
| Mobile home | 11 | 2 | 419 | 320 | 1126 | |
| Unknown | 1 | 0 | 374 | 374 | 374 | |
| Mother’s ethnicity | Hispanic | 172 | 30 | 430 | 305 | 686 |
| Not Hispanic | 411 | 70 | 501 | 331 | 793 | |
| Household smoking | None | 553 | 95 | 475 | 318 | 770 |
| ≥1 cigarette/day | 29 | 5 | 586 | 412 | 839 | |
| Unknown | 1 | 0 | 304 | 304 | 304 | |
PAH, polycyclic aromatic hydrocarbon.