Table 3.
Differences in mean oxidative stress biomarkers (95% confidence intervals for different PAH exposure categories, among women without tobacco smoke exposure
| PAH exposure categories | Glutathione (mg/dl packed red blood cells) | Glutathione peroxidase (IU/liter) |
|---|---|---|
| All women without tobacco smoke exposure (n=676) | ||
| 2nd vs. 1st quartile | −2.52 (−5.86, 0.83) | 8.45 (−10.18, 27.08) |
| 3rd vs. 1st quartile | −2.15 (−5.58, 1.28) | 9.50 (−9.63, 28.63) |
| 4th vs. 1st quartile | −5.98 (−9.54, −2.42) | 18.02 (−1.82, 37.86) |
| Pre-menopausal women without tobacco smoke exposure (n=228) | ||
| 2nd vs. 1st quartile | −2.83 (−7.37, 1.72) | 17.30 (−12.97, 47.57) |
| 3rd vs. 1st quartile | −4.29 (−9.82, 1.23) | 31.17 (−5.63, 67.97) |
| 4th vs. 1st quartile | −11.20 (−16.28, −6.12) | 35.91 (2.09, 69.74) |
| Post-menopausal women without tobacco smoke exposure (n=448) | ||
| 2nd vs. 1st quartile | −2.06 (−6.63, 2.52) | 1.32 (−22.69, 25.33) |
| 3rd vs. 1st quartile | −0.35 (−4.74, 4.04) | −3.23 (−26.27, 19.81) |
| 4th vs. 1st quartile | −3.14 (−7.94, 1.67) | 3.52 (−21.69, 28.74) |
Abbreviation: PAH, polycyclic aromatic hydrocarbon; TBARS, thiobarbituric acid-reactive substances Adjusted for age, education, body mass index, season, dietary vitamin C intake, and dietary vitamin E intake.