Group | Time of Exposure (hrs/day) | % Hi | % HbCO | % SHb |
1 | 0 | 4.07 ± 1.00 | 0.55 ± 0.07 | 0.84 ± 0.04bc |
2 | 2 | 5.22 ± 0.88 | 0.66 ± 0.04 | 2.25 ± 0.49a |
3 | 4 | 4.38 ± 0.57 | 0.82 ± 0.08ab | 2.69 ± 0.22a |