Association between exposure to Chinese herbs and the development of uraemia
| Variable | Unadjusted OR (95% CI) | Adjusted OR in model 1 (95% CI) | Adjusted OR in model 2 (95% CI) | Adjusted OR in model 3 (95% CI) |
| Manufacturing and selling Chinese herbal medicine | ||||
| Yes | 2.70 (1.04 to 7.02) | 3.34 (1.22 to 9.19) | 3.19 (1.11 to 9.12) | 3.43 (1.16 to 10.19) |
| No | (1.0) | (1.0) | (1.0) | (1.0) |
| Working more than 8 h daily | ||||
| Yes | 2.19 (0.96 to 5.01) | 2.76 (1.12 to 6.83) | 2.58 (0.96 to 6.94) | 2.44 (0.89 to 6.75) |
| No | (1.0) | (1.0) | (1.0) | (1.0) |
| Processing, selling or dispensing herbal medicines containing Fangji | ||||
| Yes | 2.84 (1.15 to 7.04) | 2.90 (1.18 to 7.16) | 3.91 (1.32 to 11.64) | 4.17 (1.36 to 12.81) |
| No | (1.0) | (1.0) | (1.0) | (1.0) |
| Living in the workplace | ||||
| Yes | 2.29 (0.93 to 5.64) | 2.10 (0.92 to 5.22) | 2.34 (0.91 to 5.98) | 3.14 (1.11 to 8.84) |
| No | (1.0) | (1.0) | (1.0) | (1.0) |
| History of taking herbal medicines containing Fangji | ||||
| Frequently or occasionally | 5.90 (1.43 to 24.32) | 5.44 (1.33 to 22.15) | 5.76 (1.30 to 25.51) | 5.42 (1.18 to 24.96) |
| Seldom or never | (1.0) | (1.0) | (1.0) | (1.0) |
The unadjusted OR is estimated using the Mantel–Haenszel procedure and the adjusted OR is estimated using conditional logistic regression models.
Model 1: adjusted for age; model 2: adjusted for age and frequent use of analgesics; model 3: adjusted for age, frequent use of analgesics, habitual consumption of alcohol, habitual consumption of fermented food, and habitual consumption of smoked food.