Table 2.

Demographic characteristics, risk factors, self-reported event exposures and injuries by enrollment group, World Trade Center Health Registry^a

Parameter	Totalb		WTCHR enrollment groupsa
			Rescue–recovery workers and volunteers		Students in schools south of Canal Street		Staff in schools south of Canal Street		Residents south of Canal Street		Building occupants, passersby, and people in transit south of Chambers Street on 9/11
	N	%	N	%	N	%	N	%	N	%	N	%
Total	71,437	100.0	30,665	42.9	2,075	2.9	571	5.0	14,665	20.5	43,487	60.9
Demographics
Gender
Male	42,794	59.9	23,780	77.6	1,016	49.0	155	27.2	6,617	45.1	23,231	53.4
Female	28,641	40.1	6,885	22.5	1,059	51.0	416	72.9	8,046	54.9	20,255	46.6
Age group at interview
<18	2,635	3.7	27	0.1	1,633	78.8	2	0.4	2,204	15.1	1,563	3.6
18–24	2,635	3.7	857	2.8	440	21.2	25	4.5	819	5.6	1,574	3.6
25–44	33,927	47.3	16,375	53.6	0	0	223	39.8	4,930	33.6	20,830	47.9
45–64	28,362	39.6	12,360	40.4	0	0	287	51.2	4,754	32.4	17,341	39.9
65+	3,520	4.9	954	3.1	0	0	24	4.3	1,868	12.7	1,921	4.4
Race/ethnicity
Non-Hispanic White	44,970	63.0	21,883	71.4	875	42.2	244	42.7	8,392	57.2	25,859	59.5
Non-Hispanic Black	8,466	11.9	2,698	8.8	215	10.4	88	15.4	823	5.6	6,335	14.6
Hispanic	9,564	13.4	4,139	13.5	401	19.3	127	22.2	1,924	13.1	6,081	14.0
Asian	5,382	7.5	740	2.4	453	21.8	72	12.6	2,844	19.4	3,282	7.6
Other	3,055	4.3	1,205	3.9	131	6.3	40	7.0	682	4.7	1,930	4.4
Total household income at interview (in thousands)c
<25	6,858	11.3	2,182	7.9	N/A		110	22.4	2,871	27.7	3,972	10.8
25 to <50	13,081	21.6	5,538	20.0			167	33.9	1,814	17.5	8,195	22.4
50 to <75	12,791	21.1	6,958	25.1			92	18.7	1,339	12.9	7,072	19.3
75 to <150	20,648	34.1	11,187	40.4			105	21.3	2,366	22.9	12,074	33.0
≥150	7,122	11.8	1,836	6.6			18	3.7	1,963	19.0	5,334	14.6
Residence on 9/11
New York City	46,241	64.7	14,895	48.6	2,043	98.5	493	86.3	14,665	100.0	30,981	71.2
Manhattan	21,370	29.9	3,544	11.6	1,547	74.6	289	50.6	14,665	100.0	13,838	31.8
Bronx	3,312	4.6	1,571	5.1	36	1.7	23	4.0	0	0	2,198	5.1
Brooklyn	9,602	13.4	3,426	11.2	264	12.7	98	17.2	0	0	7,286	16.8
Queens	7,797	10.9	3,816	12.4	175	8.4	68	11.9	0	0	5,114	11.8
Staten Island	4,160	5.8	2,538	8.3	21	1.0	15	2.6	0	0	2,545	5.9
Other New York State	10,670	14.9	7,183	23.4	8	0.4	22	3.9	0	0	5,604	12.9
New Jersey	7,294	10.2	2,628	8.6	12	0.6	39	6.8	0	0	5,361	12.3
Connecticut	481	0.7	244	0.8	0	0	0	0	0	0	268	0.6
Otherd	6,751	9.5	5,715	18.6	12	0.6	17	3.0	0	0	1,273	2.9
Risk factors, event exposures and experiences
Smoking status at interview
Current smoker	10,878	15.8	5,146	17.0	N/A		87	15.6	1,889	14.6	6,552	15.7
Former smoker	18,038	26.2	8,160	26.9			137	24.6	3,478	26.9	10,697	25.6
Never smoker	39,953	58.0	17,007	56.1			333	59.8	7,556	58.5	24,608	58.8
Caught in dust and debris cloud that resulted from the collapse of the towers on 9/11
Yes	36,452	51.4	11,355	37.2	1,058	52.3	362	64.2	7,195	49.9	30,535	70.7
No	34,457	48.6	19,170	62.8	967	47.8	202	35.8	7,237	50.2	12,628	29.3
Witnessed a traumatic event on 9/11
Witnessed any event	49,551	69.8	15,131	49.5	1,619	79.9	479	84.3	10,378	71.8	39,671	91.7
Type of event witnessed
Airplane hitting WTC	20,247	28.5	5,639	18.4	560	27.9	219	38.6	4,815	33.3	16,573	38.3
People falling or jumping from WTC	20,343	28.8	4,952	16.2	581	29.6	190	34.0	4,002	28.0	18,586	43.5
Buildings collapsing	33,179	46.7	10,898	35.6	1,067	53.1	335	59.0	7,167	49.6	26,456	61.2
People running away from a cloud or smoke	37,620	52.9	9,679	31.6	1,348	66.2	396	40.0	8,168	56.4	33,076	76.5
People injured or killed	23,547	33.3	8,966	29.4	478	24.2	163	29.0	3,753	26.2	19,731	46.0
Injuries on 9/11
Sustained an injury	9,177	12.9	4,654	15.2	78	3.8	72	12.7	965	6.6	6,887	15.9
Type of injury
Burn	1,208	1.7	604	2.0	9	0.4	12	2.1	141	1.0	907	2.1
Broken bone	579	0.8	233	0.8	3	0.1	8	1.4	85	0.6	489	1.1
Concussion	444	0.6	197	0.6	4	0.2	8	1.4	50	0.3	395	0.9
Cut	4,874	6.9	2,995	9.8	37	1.8	26	4.6	400	2.8	3,534	8.2
Sprain or strain	5,278	7.4	2,381	7.8	44	2.1	45	7.9	588	4.1	4,121	9.6

^aWTCHR eligibility groups are not mutually exclusive; approximately 26% of registrants belong to more than one eligibility group.

^bTotals do not add up to 71,437 because not all the enrollees answered all the questions. N missing = 2 for gender, 358 for age, 2,568 for smoking status, 528 for dust, 339 to 881 for witnessing events, 205 to 493 for types of injuries. Totals and percentages are based on non-missing responses only.

^cHousehold income is displayed only for enrollees 18+ years of age at interview. N 18+ = 68,444 for total, 30,546 for rescue–recovery workers and volunteers, 559 for school staff, 440 for adult students, 12,371 for residents, and 41,666 for building occupants, passersby, and people in transit. N missing=7,994 for household income.

^dIncludes enrollees from other states (N = 5350), Canada (N = 76), Puerto Rico (N = 33), and those with no zipcode reported (1,292).

N/A Data not available because the majority of student enrollees were under the age of 18 at the time of interview, and proxy interviews resulted in missing data.