Combined effects of alcohol drinking and HPV viral load on the risk of CIN1 in HPV-positive women.

*Multivariate logistic regression model. Adjusted for age (10-year age groups), smoking habit status (never vs. ever), oral contraceptive use (never vs. ever), number of childbirths (0, 1, 2, ≥3), physical activity (METS: <170, 170–218, and ≥218), and energy intake from food (kcal/day).
2SI: synergic index (OR11-1)/(OR01+OR10-2), in which OR11 is the odds ratio of the joint effect of two risk factors and OR01 and OR10 are odds ratio of each risk factor in the absence of the other.
3RLU/PC: relative light.