Table 1.
Baseline characteristics of the WTC EHC longitudinal population (N=946) as whole and stratified by baseline spirometry pattern.
| Variable a | Longitudinal population N=946 | Normal N=642 | Low FVC N=193 | Obstructed N=75 | Low FVC/obstructed N=36 | p-value b |
|---|---|---|---|---|---|---|
| Age | 0.16 | |||||
| Mean(SD) | 50.2(11.1) | 50.0(11.4) | 50.5(10.2) | 49.6(10.8) | 53.5(11.3) | |
| Gender N(%) | 0.08 | |||||
| Female | 478(50.5) | 340 (53.0) | 93 (48.2) | 32(42.7) | 13(36.1) | |
| Male | 468(49.5) | 302 (47.0) | 100(51.8) | 43(57.3) | 23(63.9) | |
| Race/Ethnicity N(%) | <.0001 | |||||
| Hispanic | 429 (52.5) | 304(47.4) | 88(45.6) | 28(37.3) | 9(25.0) | |
| White | 257 (27.2) | 173(27.0) | 41(21.2) | 25(33.3) | 18(50.0) | |
| Black | 163(17.2) | 118(18.4) | 26(13.5) | 15(20.0) | 4(11.1) | |
| Asian | 68(7.2) | 32(5.0) | 28(14.5) | 5(6.7) | 3(8.3) | |
| Other | 29(3.1) | 15(2.3) | 10(5.2) | 2(2.7) | 2(5.6) | |
| Income/year | 0.05 | |||||
| ≤15K | 434(46.8) | 284(45.0) | 104(55.3) | 33 (45.2) | 13 (37.1) | |
| 15K-30K | 155(16.7) | 108(17.1) | 31(16.5) | 13 (17.8) | 3(8.6) | |
| >30K | 338(36.5) | 239(37.9) | 53(28.2) | 27(37.0) | 19(54.3) | |
| BMI N(%) | 0.0023 | |||||
| Normal | 249(26.3) | 164(25.6) | 47(24.4) | 33(44.0) | 5(13.9) | |
| Over weight | 353(37.3) | 248(38.6) | 63(32.6) | 25(33.3) | 17(47.2) | |
| Obesity | 344(36.4) | 230(35.8) | 83(43.0) | 17(22.7) | 14(38.9) | |
| Tobacco N(%) | 0.0016 | |||||
| ≤5pack-year | 733(78.9) | 512(81.1) | 151(79.5) | 46(63.0) | 24(68.6) | |
| >pack-year | 196(21.1) | 119(18.9) | 39(20.5) | 27(37.0) | 11(31.4) | |
| Caught in WTC dust cloud N(%) | 0.93 | |||||
| No | 489(52.4) | 330(52.1) | 104(54.2) | 37(50.0) | 18(51.4) | |
| Yes | 445(47.6) | 303(47.9) | 88(45.8) | 37(50.0) | 17(48.6) | |
| WTC exposure category N(%) | 0.014 | |||||
| Local worker | 438(46.3) | 294(45.8) | 94(48.7) | 30(40.0) | 20(55.6) | |
| Clean up worker | 247(26.1) | 185(28.8) | 45(23.3) | 12(16.0) | 5(13.9) | |
| Resident | 172(18.2) | 108(16.8) | 39(20.2) | 20(26.7) | 5(13.9) | |
| Rescue/recovery | 67(7.1) | 42(6.5) | 13(6.7) | 8(10.7) | 4(11.1) | |
| Other | 22(2.3) | 13(2.0) | 2(1.0) | 5(6.7) | 2(5.6) | |
| Respiratory symptoms | 0.21 | |||||
| No | 130(13.9) | 94(14.8) | 28(14.7) | 6(8.2) | 2(5.7) | |
| Yes | 802(86.1) | 540(85.2) | 162(85.3) | 67(91.8) | 33(94.3) |
a
Data were missing on “Caught in WTC dust cloud” for 12 subjects, “Income” for 19 subjects, “Tobacco” for 17 subjects, and “Lower respiratory symptom” for 14 subjects.
b
P-value were from Chi-square or ANOVA tests comparing baseline characteristic across spirometry pattern subgroups of the longitudinal population.