TABLE 1.
DEMOGRAPHIC DATA AT BASELINE AND LAST SURVEY IN COTTON AND SILK WORKERS
| Cotton Workers (n = 408) | Silk Workers (n = 417) | |
|---|---|---|
| Age, yr | 37.1 (10.4) | 36.1 (10.5) |
| Height, cm | 163.9 (7.5) | 162.5 (7.2) |
| Sex, male, n (%) | 190 (46.6) | 178 (42.7) |
| Smoking, n (%) | 148 (36.3)‡ | 111 (26.6) |
| Pack-years* | 7.9 (9.3) | 9.2 (10.0) |
| Endotoxin exposure, EU/m3/yr† | 48,479.5 (43,780.2) | — |
| Dust exposure, mg/m3/yr† | 19.3 (13.3) | — |
| Years worked† | 27.0 (7.9) | 28.2 (7.3) |
| Baseline FEV1, ml | 2,915.3 (720.9) | 2,885.1 (662.2) |
| Annualized changes in FEV1 over 15 yr, ml/yr | −32.9 (20.1)§ | −28.9 (18.9) |
| Annualized changes in FEV1 over 20 yr, ml/yr | −29.2 (22.5)§ | −25.0 (21.1) |
Unless otherwise stated, data are presented as means (SD).
*
Calculated among ever-smokers only.
†
Data from the last survey.
‡
P = 0.03 when compared with silk workers.
§
P = 0.01 when compared with silk workers.