HRs* for respiratory symptoms by levels of baseline water and urinary arsenic concentrations†
| Chronic cough HR (95% CI) n=859 | Breathing problem HR (95% CI) n=1169 | Blood in sputum HR (95% CI) n=238 | |
| Water arsenic (μg/l) | |||
| ≤7 | 1.0 | 1.0 | 1.0 |
| 7–40 | 1.19 (0.95 to 1.50) | 1.44 (1.20 to 1.74) | 1.15 (0.75 to 1.76) |
| 40–90 | 1.40 (1.11 to 1.75) | 1.52 (1.25 to 1.84) | 1.09 (1.69 to 1.70) |
| 90–178 | 1.57 (1.25 to 1.97) | 1.42 (1.16 to 1.73) | 1.66 (1.10 to 2.51) |
| >178 | 1.60 (1.27 to 2.01) | 1.41 (1.56 to 1.72) | 1.51 (0.98 to 2.32) |
| Urinary arsenic (μg/g creatinine) | |||
| ≤90 | 1.0 | 1.0 | 1.0 |
| 90–160 | 0.98 (0.78 to 1.23) | 1.14 (0.95 to 1.38) | 1.16 (0.77 to 1.74) |
| 160–246 | 1.14 (0.91 to 1.42) | 1.16 (0.96 to 1.40) | 1.05 (0.69 to 1.60) |
| 246–406 | 1.52 (1.23 to 1.88) | 1.28 (1.06 to 1.54) | 1.03 (0.67 to 1.58) |
| >406 | 1.51 (1.21 to 1.87) | 1.27 (1.05 to 1.53) | 1.33 (0.89 to 1.99) |