|
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*
| | |
< 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
| | |
0.80
|
|
Han
|
83 (91.2%)
|
30 (93.8%)
| |
|
Aboriginal
|
7 (7.7%)
|
2 (6.2%)
| |
|
Hakka
|
1 (1.1%)
|
0 (0.0%)
| |
|
Smoking
| | |
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*
| | |
< 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
|
- *p value < 0.05 for two-sample t test, chi-square test, or Fisher's exact test
-
†FVC: forced vital capacity, FEV1: 1-second forced expiratory volume, MMF: maximal mid-expiratory flow rate; ‡pred = predicted value
