Table 3: Serum mean level of calcium, phosphorus, alkaline phosphatase and vitamin D at similar times to DEXA according to BMD.

BMD

Calcium (± SD)

Phosphorus (± SD)

Alkaline phosphatase (± SD)

Vitamin D (± SD)

Normal

9.8 ± 0.3

4.7 ± 0.5

317 ± 188

21.8 ± 8.5

Low bone mineral density

9.7 ± 0.5

4.8 ± 0.5

311 ± 201

24.2 ± 9.8

Osteoporosis

9.7 ± 0.4

5.1 ± 0.4

280 ± 168

27.2 ± 6.4

P value*

0.787

0.167

0.920

0.434

BMD: Bone mineral density; DEXA: Dual-energy X-ray absorptiometry; SD: Standard deviasion; *One way Anova test