Table 1.
Demographics
| Date/event | Baseline cohort | Sub-cohort controls | Resistant cases | p | |
|---|---|---|---|---|---|
| WTC Exposure, n(%) |
High |
197 (25) |
21 (19) |
14 (18) |
1.000 |
| |
Intermediate |
604 (75) |
90 (81) |
63 (82) |
|
| 9/11 to PFT, months |
MME |
2.7 (2.0-3.8) |
2.5 (2.0-3.2) |
2.6 (2.2-3.2) |
0.219 |
| |
SPE |
33.8 (24.8-57.0) |
32.7 (24.6-57.4) |
32.5 (28.3-52.2) |
0.755 |
| BMI, kg/m2 |
MME |
28.0 (26–30) |
28.1 (26–31) |
27.3 (26–29) |
0.018 |
| |
SPE |
28.9 (27–31) |
29.1 (27–31) |
27.6 (26–30) |
0.010 |
| Years of service |
9/11/01 |
13 (7–19) |
14 (7–18) |
14 (10–19) |
0.249 |
| Age | 9/11/01 | 40 (36–45) | 41 (36–44) | 42 (38–46) | 0.159 |
WTC World trade center, PFT Pulmonary function test, BMI Body mass index, MME Medical monitoring entry, SPE Subspecialty pulmonary exam.
Expressed as median (interquartile range.