Characteristics | Tea Workers (N = 91) | Comparison (N = 32) | p |
---|---|---|---|
Age (year) (mean ± SD) | 40.6 ± 10.4 | 41.1 ± 9.1 | 0.81 |
Height (cm) (mean ± SD) | 167.7 ± 6.3 | 169.5 ± 5.1 | 0.15 |
Weight (kg) (mean ± SD) | 67.2 ± 8.1 | 69.6 ± 8.2 | 0.14 |
Education level* | Â | Â | < 0.01 |
   Elementary | 18 (19.8%) | 0 (0.0%) |  |
   Junior high | 27 (29.7%) | 0 (0.0%) |  |
   Senior high | 45 (49.5%) | 26 (81.3%) |  |
   University | 1 (1.1%) | 6 (18.7%) |  |
Race | Â | Â | 0.80 |
   Han | 83 (91.2%) | 30 (93.8%) |  |
   Aboriginal | 7 (7.7%) | 2 (6.2%) |  |
   Hakka | 1 (1.1%) | 0 (0.0%) |  |
Smoking | Â | Â | 0.86 |
   Never | 31 (34.1%) | 10 (31.2%) |  |
   Ex-smoker | 16 (17.6%) | 7 (21.9%) |  |
   Current | 44 (48.3%) | 15 (46.9%) |  |
Tea-drinking* | Â | Â | < 0.01 |
   Never | 3 (3.3%) | 8 (25.0%) |  |
   Occasional | 22 (24.2%) | 11 (34.4%) |  |
   Habitual | 66 (72.5%) | 13 (40.6%) |  |
Baseline pulmonary function†|  |  |  |
   FVC (L) (mean ± SD) | 4.05 ± 0.68 | 4.15 ± 0.58 | 0.41 |
   FVC (%pred‡) (mean ± SD) | 89.10 ± 10.38 | 89.42 ± 7.27 | 0.85 |
   FEV1 (L) (mean ± SD) | 3.66 ± 0.64 | 3.77 ± 0.59 | 0.39 |
   FEV1 (%pred) (mean ± SD) | 97.47 ± 12.63 | 98.30 ± 9.47 | 0.70 |
   FEV1/FVC (mean ± SD) | 90.47 ± 4.81 | 90.60 ± 4.67 | 0.90 |
   MMF (L/S) (mean ± SD) | 4.93 ± 1.29 | 4.99 ± 1.12 | 0.79 |
   MMF (%pred) (mean ± SD) | 123.78 ± 30.37 | 123.44 ± 23.73 | 0.95 |