NR4A1 and vitamin D deficiency: Compared to the lowest BMI category, the highest BMI category based on quartiles (≥25.9 kg/m2) or Asian-specific cutpoints (≥27.5 kg/m2) was associated with vitamin D deficiency in both (1) age- and season-adjusted models and (2) models additionally adjusted for education, SBCS phase, total physical activity, menopausal status, TMN stage, and hormone receptor status.