Table 2.

Associations between the six vitamins and BMDs among participants in NHANES 2005–2006

Vitamins	Total femur BMD	P	Femoral neck BMD	P	Vitamins	Total femur BMD	P	Femoral neck BMD	P
B12 (pmol/L)					D (nmol/L)
Q1	ref		ref		Q1	ref		ref
Q2	0.010 (-0.004, 0.024)	0.167	0.010 (-0.003, 0.024)	0.139	Q2	-0.004 (-0.021, 0.012)	0.592	-0.009 (-0.024, 0.007)	0.273
Q3	0.017 (0.002, 0.031)	0.022	0.013 (-0.001, 0.027)	0.058	Q3	0.006 (-0.010, 0.022)	0.442	0.004 (-0.012, 0.020)	0.616
Q4	0.021 (0.006, 0.036)	0.005	0.021 (0.007, 0.035)	0.003	Q4	0.010 (-0.006, 0.026)	0.219	-0.001 (-0.017, 0.014)	0.818
B9 (nmol/L)					A (μmol/L)
Q1	ref		ref		Q1	ref		ref
Q2	-0.005 (-0.020, 0.010)	0.537	-0.007 (-0.022, 0.007)	0.348	Q2	0.001 (-0.015, 0.017)	0.886	-0.002 (-0.018, 0.013)	0.763
Q3	0.001 (-0.015, 0.017)	0.871	-0.003 (-0.018, 0.012)	0.724	Q3	-0.001 (-0.016, 0.015)	0.978	-0.004 (-0.019, 0.012)	0.642
Q4	0.007 (-0.008, 0.023)	0.370	0.001 (-0.014, 0.016)	0.876	Q4	0.007 (-0.009, 0.023)	0.391	-0.001 (-0.016, 0.014)	0.891
C (μmol/L)					E (μmol/L)
Q1	ref		ref		Q1	ref		ref
Q2	0.024 (0.009, 0.040)	0.002	0.023 (0.008, 0.038)	0.002	Q2	-0.004 (-0.019, 0.012)	0.652	-0.003 (-0.018, 0.012)	0.704
Q3	0.027 (0.012, 0.042)	< 0.001	0.016 (0.002, 0.030)	0.023	Q3	-0.001 (-0.018, 0.017)	0.939	-0.007 (-0.023, 0.009)	0.372
Q4	0.024 (0.009, 0.040)	0.002	0.020 (0.005, 0.034)	0.009	Q4	-0.001 (-0.017, 0.017)	0.978	-0.010 (-0.027, 0.007)	0.251

All estimated results were expressed as β (95%CI); β: partial regression coefficient; CI, confidence interval. Models were adjusted for age, sex, race, family poverty-to-income ratio, education, body mass index, calcium concentration, physical activity, drinking status, smoking status, regular milk consumption, osteoporosis family history, prednisone/cortisone intake daily, diabetes, and hypertension. BMD: bone mineral density. Boldness indicates a statistical significance