Table 1.
Baseline participant characteristics by report of exposure to vapors, gas, dust, or fumes in longest job
| Current or Former Smokers (Stratum 2–4) (N = 2,736) | |||
|---|---|---|---|
| All Participants | No VGDF Exposure in Longest Job (n = 1,390) | VGDF Exposure in Longest Job (n = 1,346) | |
| Age, mean (SD), yr | 63.5 (8.9) | 64.9 (8.8) | 62.1 (8.8) |
| Sex, male, n (%) | 1,487 (54.3) | 616 (44.3) | 871 (64.7) |
| Race, white, n (%) | 2,100 (76.8) | 1,096 (78.8) | 1,004 (74.6) |
| BMI, mean (SD), kg/m2 | 27.9 (5.3) | 27.7 (5.3) | 28.2 (5.3) |
| Pack-years, mean (SD) | 49.3 (26.9) | 48.7 (28.3) | 50.0 (25.5) |
| Current smoker, n (%) | 1,093 (40.0) | 531 (38.2) | 540 (40.1) |
| Years at longest job, mean (SD) | 22.3 (12.1) | 21.7 (12.2) | 23.0 (12.0) |
| Currently working, n (%) | 734 (26.8) | 357 (25.7) | 377 (28.0) |
| COPD diagnosis, n (%) | 1,809 (66.1) | 895 (64.4) | 914 (67.9) |
| Post-BD FEV1% pred, mean (SD) | 73.1 (26.5) | 75.6 (26.0) | 70.4 (26.6) |
| Six-minute walk test distance, mean (SD), m | 407.7 (120.6) | 409.6 (121.1) | 405.8 (120.6) |
| mMRC score, mean (SD) | 1.08 (1.0) | 1.01 (0.97) | 1.15 (1.03) |
| CAT score, mean (SD) | 14.1 (8.3) | 13.1 (7.9) | 15.2 (8.4) |
| SGRQ score, mean (SD) | 33.6 (20.6) | 30.7 (19.9) | 36.4 (20.7) |
Definition of abbreviations: BD = bronchodilator; BMI = body mass index; CAT = COPD Assessment Test; COPD = chronic obstructive pulmonary disease; FEV1 = forced expiratory volume in 1 second; mMRC = modified Medical Research Council questionnaire; SD = standard deviation; SGRQ = St. George’s Respiratory Questionnaire; VGDF = vapors, gas, dust, or fumes.