Table 1.
Characteristicsa of Study Sample and Persons Reporting Any Injury on September 11, 2001, World Trade Center Health Registry, 2003–2007
| Characteristic | All |
Any Injuryb |
No Injury |
|||
|---|---|---|---|---|---|---|
| No. | % | No. | % | No. | % | |
| Wave 1 mode of recruitment | 14,087 | 100.0 | 1,980 | 100.0 | 12,107 | 100.0 |
| List identified | 2,810 | 19.9 | 296 | 14.9 | 2,514 | 20.8 |
| Self identified | 11,277 | 80.1 | 1,684 | 85.1 | 9,593 | 79.2 |
| Wave 2 survey mode | ||||||
| 5,516 | 39.2 | 838 | 42.3 | 4,678 | 38.6 | |
| CATI | 1,835 | 13.0 | 235 | 11.9 | 1,600 | 13.2 |
| Web | 6,736 | 47.8 | 907 | 45.8 | 5,829 | 48.1 |
| Sex | ||||||
| Female | 5,637 | 40.0 | 617 | 31.2 | 5,020 | 41.5 |
| Male | 8,450 | 60.0 | 1,363 | 68.8 | 7,087 | 58.5 |
| Age at wave 1 interview, years | ||||||
| 18–24 | 348 | 2.5 | 13 | 0.7 | 335 | 2.8 |
| 25–44 | 6,605 | 46.9 | 950 | 48.0 | 5,655 | 46.7 |
| 45–54 | 4,410 | 31.3 | 698 | 35.3 | 3,712 | 30.7 |
| ≥55 | 2,724 | 19.3 | 319 | 16.1 | 2,405 | 19.9 |
| Race/ethnic group | ||||||
| Non-Hispanic black | 1,726 | 12.3 | 219 | 11.1 | 1,507 | 12.4 |
| Hispanic | 1,509 | 10.7 | 251 | 12.7 | 1,258 | 10.4 |
| Asian | 972 | 6.9 | 97 | 4.9 | 875 | 7.2 |
| Other | 388 | 2.8 | 60 | 3.0 | 328 | 2.7 |
| Non-Hispanic white | 9,492 | 67.4 | 1,353 | 68.3 | 8,139 | 67.2 |
| Educational attainment | ||||||
| Less than high school or high school | 2,313 | 16.4 | 384 | 19.4 | 1,929 | 15.9 |
| Some college | 3,155 | 22.4 | 603 | 30.5 | 2,552 | 21.1 |
| College/postgraduate | 8,536 | 60.6 | 979 | 49.4 | 7,557 | 62.4 |
| Rescue/recovery worker | ||||||
| Yes | 3,471 | 24.6 | 975 | 49.2 | 2,496 | 20.6 |
| No | 10,616 | 75.4 | 1,005 | 50.8 | 9,611 | 79.4 |
| Smoking status at wave 1 or wave 2 | ||||||
| Former smoker | 3,777 | 26.8 | 512 | 25.9 | 3,265 | 27.0 |
| Current smoker | 1,768 | 12.6 | 289 | 14.6 | 1,479 | 12.2 |
| Never smoker | 8,449 | 60.0 | 1,165 | 58.8 | 7,284 | 60.2 |
| Dust/debris cloud exposure on 9/11 | ||||||
| Intense dust cloud | 5,987 | 42.5 | 1,363 | 68.8 | 4,624 | 38.2 |
| Some/none | 7,597 | 53.9 | 555 | 28.0 | 7,042 | 58.2 |
| Number of injury types | ||||||
| 1 | 1,468 | 10.4 | 1,468 | 74.1 | 0 | 0.0 |
| 2 | 421 | 3.0 | 421 | 21.3 | 0 | 0.0 |
| ≥3 | 91 | 0.6 | 91 | 4.6 | 0 | 0.0 |
| No injuries | 12,107 | 85.9 | 0 | 0.0 | 12,107 | 100.0 |
| Probable PTSD at wave 1 | ||||||
| Yes | 1,586 | 11.3 | 426 | 21.5 | 1,160 | 9.6 |
| No | 12,124 | 86.1 | 1,507 | 76.1 | 10,617 | 87.7 |
| ≥1 chronic physical conditions diagnosed in 2002–2007c | ||||||
| Yes | 2,474 | 17.6 | 495 | 25.0 | 1,979 | 16.3 |
| No | 11,613 | 82.4 | 1,485 | 75.0 | 10,128 | 83.7 |
Abbreviations: CATI, computer-assisted telephone interviewing; PTSD, posttraumatic stress disorder.
a Denominator for percent includes persons with missing data.
b Any injury includes cut, abrasion, or puncture wound; sprain or strain; burn; broken bone (fracture) or dislocation; and concussion/head injury/knocked out by being hit on the head.
c Chronic physical conditions include: angina, heart attack, other heart conditions, stroke, asthma, chronic bronchitis, emphysema, reactive airway disease syndrome, other lung conditions, diabetes, and cancer.