Table 1.
Selected characteristics of the WTCHP responders (n = 20,984).
| Characteristic | n (%) |
|---|---|
| Sex | |
| Male | 17,781 (85) |
| Female | 3,203 (15) |
| Median age on 9/11/2001 (years) | 38 |
| Age on 9/11/2001 (years) | |
| < 40 | 11,835 (56) |
| ≥ 40 | 9,149 (44) |
| Race/ethnicity | |
| Black | 2,698 (13) |
| White non-Hispanic | 12,337 (59) |
| White Hispanic | 1,345 (6) |
| Hispanic missing race | 3,896 (19) |
| Other race | 553 (3) |
| Unknown/missing | 155 (1) |
| Smoking history | |
| Current | 3,374 (16) |
| Former | 5,054 (24) |
| Never | 12,240 (58) |
| Missing | 316 (2) |
| Year of registration/SSN | |
| 2001–2005 with SSN | 7,805 (37) |
| 2001–2005 without SSN | 5,254 (25) |
| 2006–2008 | 7,925 (38) |
| Clinical center at time of first visit | |
| Bellevue | 1,046 (5) |
| Mount Sinai | 15,533 (74) |
| Queens | 1,639 (8) |
| Stony Brook | 2,082 (10) |
| UMDNJ | 684 (3) |
| Occupation | |
| Protective services | 8,765 (42) |
| Construction | 5,138 (24) |
| CM&IRG | 2,084 (10) |
| Other | 4,019 (19) |
| Missing | 978 (5) |
| Exposure indexa | |
| Very high | 638 (3) |
| High | 3,546 (17) |
| Intermediate | 13,638 (65) |
| Low | 2,728 (13) |
| Missing | 434 (2) |
| Dust cloud exposure | |
| Directly in dust cloud | 4,211 (20) |
| Significant dust | 3,415 (16) |
| Some dust | 1,510 (7) |
| No dust/early arrival (9/11–9/14) | 6,054 (29) |
| No dust/late arrival (9/15 and beyond) | 5,124 (24) |
| Missing | 670 (3) |
| Duration on site (days) | |
| 0–14 | 4,551 (22) |
| 15–59 | 6,124 (29) |
| 60–119 | 4,956 (24) |
| ≥ 120 | 5,303 (25) |
| Missing | 50 (0) |
| Location of work | |
| On debris pile | 7,403 (35) |
| Not on debris pile | 12,865 (61) |
| Missing | 716 (3) |
| CM&IRG, buildings and grounds cleaning and maintenance and electrical, telecommunications and other installation and repair groups. aResponders were in one of the two highest categories if they were directly in the dust cloud on 9/11. They were in the very high category if, in addition to being directly in the dust cloud they worked on the pile and worked on the site for ≥ 90 days. Responders were in the intermediate or low category if they were not directly exposed to the dust cloud on 9/11. Responders were in the low category if, in addition to not being directly exposed to the dust cloud, they also did not work on the pile and worked for < 40 days. | |