Table 4 The stratified association between vitamins intake and osteoporosis

Gender

Male

 Vitamin A, µg

Ref

0.96 (0.84–1.08)

0.88 (0.80–0.99)

< 0.01

 Vitamin C, mg

Ref

0.91 (0.81–1.08)

0.81 (0.70–0.96)

< 0.01

 Vitamin D, µg

Ref

0.96 (0.85–1.10)

0.90 (0.78–0.99)

< 0.01

Female

 Vitamin A, µg

Ref

0.91 (0.80–1.05)

0.82 (0.75–0.94)

< 0.01

 Vitamin C, mg

Ref

0.85 (0.75–1.02)

0.75 (0.65–0.90)

< 0.01

 Vitamin D, µg

Ref

0.91 (0.78–1.05)

0.85 (0.71–0.95)

< 0.01

Age

Age < 60

 Vitamin A, µg

Ref

0.95 (0.85–1.09)

0.87 (0.80–0.97)

< 0.01

 Vitamin C, mg

Ref

0.92 (0.80–1.07)

0.82 (0.71–0.98)

< 0.01

 Vitamin D, µg

Ref

0.97 (0.87–1.09)

0.91 (0.80–0.97)

< 0.01

Age ≥ 60

 Vitamin A, µg

Ref

0.89 (0.77–1.06)

0.81 (0.72–0.92)

< 0.01

 Vitamin C, mg

Ref

0.86 (0.76–1.03)

0.74 (0.68–0.93)

< 0.01

    Vitamin D, µg

Ref

0.90 (0.75–1.10)

0.84 (0.70–0.93)

< 0.01

BMI < 25

 Vitamin A, µg

Ref

0.95 (0.82–1.05)

0.86 (0.80–0.95)

< 0.01

 Vitamin C, mg

Ref

0.90 (0.80–1.06)

0.80 (0.70–0.95)

< 0.01

 Vitamin D, µg

Ref

0.95 (0.83–1.08)

0.90 (0.77–0.99)

< 0.01

BMI (25–30)

 Vitamin A, µg

Ref

0.94 (0.80–1.05)

0.85 (0.79–0.97)

< 0.01

 Vitamin C, mg

Ref

0.90 (0.80–1.06)

0.80 (0.68–0.95)

< 0.01

 Vitamin D, µg

Ref

0.95 (0.84–1.09)

0.89 (0.76–0.98)

< 0.01

BMI > 30

 Vitamin A, µg

Ref

0.90 (0.79–1.02)

0.82 (0.75–0.95)

< 0.01

 Vitamin C, mg

Ref

0.87 (0.75–1.03)

0.76 (0.65–0.91)

< 0.01

 Vitamin D, µg

Ref

0.90 (0.80–1.05)

0.85 (0.72–0.95)

< 0.01