Table 5.

The associations among demographic, lifestyle factors, and plasma concentrations of folate and vitamin B12 and the degree of HPV 16m in non-cases

HPV 16m
≥11.5% vs. <11.5%
Risk factorsOR (95% CI)P
Age, y≥231.000.23
<231.44 (0.80–2.62)
RaceCaucasian American1.000.23
African American1.57 (0.76–3.23)
Educational statusHigh school education or higher1.000.27
Less than high school education1.48 (0.74–3.00)
Waist circumference, cm≤881.000.87
>880.95 (0.52–1.74)
Smoking statusNever smokers1.000.74
Ever smokers0.89 (0.44–1.79)
Hormonal contraceptiveNon-users1.000.13
Users0.53 (0.23–1.19)
Plasma folate, ng/mL<11.12, ≥11.12–<18.24, ≥18.241.51 (1.03–2.23)0.03
Plasma vitamin B12, pg/mL<340.56, ≥340.56–<485.21, ≥485.211.40 (0.97–2.04)0.07