Fig. 3

RCS analysis exploring the association between dietary intake of Vitamin B2 level and osteoporosis, hip fracture and femoral BMD in different total MET subgroups. (A) Femur osteoporosis, (B) Hip fracture, (C) Total femur BMD, (D) Femoral neck BMD, (E) Trochanter BMD, and (F) Intertrochanter BMD. Variables of age, race, education, marital status, PIR, BMI, prednisone or cortisone intake, milk consumption, Vitamin D supplement, diabetes, smoking, menopause, serum albumin, serum ALP, serum total calcium, and serum phosphorus were adjusted during RCS analyses. Abbreviations: RCS, restricted cubic spline; BMI, body mass index; MET, metabolic equivalent task; PIR, ratio of family income to poverty; ALP, alkaline phosphatase