Preoperative levels of plasma micronutrients are related to endometrial cancer risk.
Klíčová slova
Abstraktní
OBJECTIVE
To examine the relation between the plasma concentration of antioxidant micronutrients and endometrial cancer risk in Korean women.
METHODS
Hospital-based case-control study.
METHODS
Seven tertiary medical institutes in Korea.
METHODS
Incidence of 28 endometrial cancer cases were identified and 140 age-matched controls selected for the same period.
METHODS
Preoperative plasma concentrations of beta-carotene, lycopene, zeaxanthin plus lutein, retinol, alpha-tocopherol, and gamma-tocopherol were measured by reverse-phase, gradient high-pressure liquid chromatography. Conditional logistic regression was used to evaluate micronutrient effect after adjustment for body mass index (BMI), menopause, parity, oral contraceptive use, smoking status, and alcohol consumption status.
METHODS
Effect of micronutrients on endometrial cancer risk.
RESULTS
The mean concentration of plasma beta-carotene (p=0.001), lycopene (p=0.008), zeaxanthin plus lutein (p=0.031), retinol (p=0.048), and gamma-tocopherol (p=0.046) were significantly lower in endometrial cancer patients than in controls. Plasma levels of beta-carotene (p for trend=0.0007) and lycopene (p for trend=0.007) were inversely associated with endometrial cancer risk across tertiles. Women in the highest tertile of plasma beta-carotene and lycopene had a 0.12-fold (95% confidence intervals (CIs) 0.03-0.48) and 0.15-fold (95% CIs 0.04-0.61) decreased risk of endometrial cancer compared to women in the lowest tertile, respectively. Other micronutrients such as zeaxanthin plus lutein (p for trend=0.142), retinol (p for trend=0.108), alpha-tocopherol (p for trend=0.322), and gamma-tocopherol (p for trend=0.087) showed no association with endometrial cancer risk.
CONCLUSIONS
Plasma levels of beta-carotene and lycopene are inversely associated with the risk of endometrial cancer in Korean women.
