Table 1.
Number (%) of workers in the study population (n = 25,748) by selected demographic characteristics, smoking status, and WTC work history.
| Variable | No. (%) |
|---|---|
| Sex | |
| Male | 20,394 (79.2) |
| Female | 5,354 (20.8) |
| Age on 11 Sep 2001 (years) | |
| 18 to < 25 | 1,346 (5.2) |
| 25 to < 45 | 15,599 (60.6) |
| 45 to < 65 | 8,319 (32.3) |
| ≥65 | 484 (1.9) |
| Race | |
| White, non-Hispanic | 18,670 (72.5) |
| Black, non-Hispanic | 2,246 (8.7) |
| Hispanic or Latino | 3,464 (13.5) |
| Asian | 607 (2.4) |
| Multiple | 457 (1.8) |
| Other or unknown | 304 (1.2) |
| Income (US$) | |
| < 35,000 | 3,673 (14.3) |
| 35,000 to < 100,000 | 16,286 (63.3) |
| ≥100,000 | 5,789 (22.5) |
| Education | |
| Did not complete high school | 1,292 (5.1) |
| High school graduate or GED | 6,331 (24.6) |
| Some college | 8,045 (31.3) |
| College or post-graduate degree | 10,080 (39.2) |
| Residence on 11 Sep 2001 | |
| NYC | 12,282 (47.8) |
| Outside NYC | 13,466 (52.3) |
| Smoking status on interview date | |
| Current smoker | 4,434 (17.2) |
| Former smoker | 6,930 (26.9) |
| Never smoked | 14,384 (55.9) |
| Date of arrival at the WTC site | |
| 11 Sep 2001 | 7,339 (28.5) |
| 12 Sep 2001 | 5,204 (20.2) |
| 13–17 Sep 2001 | 5,398 (21.0) |
| 18 Sep–31 Dec 2001 | 5,807 (22.6) |
| 1 Jan–30 Jun 2002 | 2,000 (7.8) |
| Duration of work at the WTC site (days) | |
| 1–7 | 8,754 (34.0) |
| 8–30 | 8,002 (31.1) |
| 31–90 | 4,279 (16.6) |
| > 90 | 4,713 (18.3) |