| Biomarkers | Study A | Study B | ||||||
| N | Mean | SD | CV (%) | N | Mean | SD | CV (%) | |
| NE (mg/24 hr) | 60 | 17.20 | 6.086 | 35.38 | 195 | 15.42 | 6.629 | 42.98 |
| NNAL (ng/24 hr) | 60 | 464.33 | 207.178 | 44.62 | 195 | 394.35 | 287.225 | 72.83 |
| 3-HPMA (μg/24 hr) | 60 | 1865.97 | 721.406 | 38.66 | 195 | 1534.84 | 746.143 | 48.61 |
| MHBMA (μg/24 hr) | 60 | 5.37 | 4.235 | 78.93 | 195 | 3.91 | 3.091 | 79.08 |
| S-PMA (μg/24 hr) | 60 | 7.36 | 5.504 | 74.75 | 195 | 6.06 | 4.285 | 70.75 |
| COHb (%) | 60 | 7.00 | 1.825 | 26.06 | 195 | 5.80 | 1.732 | 29.84 |
| HMPMA (μg/24 hr) | 60 | 688.59 | 251.833 | 36.57 | 195 | 418.10 | 199.937 | 47.82 |
| CEMA (μg/24 hr) | 60 | 273.19 | 90.275 | 33.04 | 195 | 198.64 | 93.335 | 46.99 |
| 1-OHP (ng/24 hr) | 60 | 304.55 | 106.034 | 34.82 | 195 | 221.23 | 146.487 | 66.21 |
| Average | 44.76 | 56.12 | ||||||