Table 1.
Demographic data and heavy metal contents in blood
| All (n = 104) | CFar (n = 74) | OFar (n = 30) | p | |
|---|---|---|---|---|
| Age (year)† | 49.32 ± 13.76 | 49.72 ± 15.03 | 48.33 ± 10.13 | 0.855 |
| Sex§, n (%) | 0.044∗ | |||
| Male | 78 (75.0) | 60 (81.1) | 18 (60.0) | |
| Female | 26 (25.0) | 14 (18.9) | 12 (40.0) | |
| Education level, n (%) | 0.175 | |||
| No higher than junior high school | 22 (21.5) | 17 (23.6) | 5 (16.7) | |
| High school | 43 (42.2) | 26 (36.1) | 17 (56.7) | |
| University and above | 37 (36.3) | 29 (40.3) | 8 (26.7) | |
| Alcohol, n (%) | 0.264 | |||
| Yes | 67 (64.4) | 45 (60.8) | 22 (73.3) | |
| No | 37 (35.6) | 29 (39.2) | 8 (26.7) | |
| Areca nut, n (%) | 0.115 | |||
| Yes | 36 (34.6) | 22 (29.7) | 14 (46.7) | |
| No | 68 (65.4) | 52 (70.3) | 16 (53.3) | |
| Smoking, n (%) | 0.829 | |||
| Yes | 43 (41.3) | 30 (40.5) | 13 (43.3) | |
| No | 61 (58.7) | 44 (59.5) | 17 (56.7) | |
| CFer, n (%) | <0.001∗∗∗ | |||
| Yes | 73 (70.2) | 73 (98.6) | 0 (0.0) | |
| No | 31 (29.8) | 1 (1.4) | 30 (100.0) | |
| OFer, n (%) | <0.001∗∗∗ | |||
| Yes | 41 (39.4) | 11 (14.9) | 30 (100.0) | |
| No | 63 (60.6) | 63 (85.1) | 0 (0.0) | |
| GM, n (%) | <0.001∗∗∗ | |||
| Yes | 15 (14.4) | 3 (4.1) | 12 (40.0) | |
| No | 89 (85.6) | 71 (95.9) | 18 (60.0) | |
| Living environment, n (%) | >0.999 | |||
| near farmland | 86 (82.7) | 61 (82.4) | 25 (83.3) | |
| downtown area | 18 (17.3) | 13 (17.6) | 5 (16.7) |
∗Significant (p-value < 0.05); ∗∗∗Significant (p-value < 0.001) † using Mann-Whitney U test; § using Fisher’s exact test.