Table 1 Characteristics of subjects undergoing measurement of calcium absorption

Age, years^c

59 ± 7

60 ± 7

0.58

Race

18 White, 2 Black

5 White, 2 Black, 1 Hispanic, 1 Native American

BMI, kg/m²

29 ± 5

36 ± 2

0.01

Calcium intake, mg/day

856 ± 352

1016 ± 453

0.31

Fractional Calcium Absorption

0.20 ± 0.06

0.23 ± 0.07

0.18

Serum Calcium, mmol/L

2.29 ± 0.09

2.26 ± 0.09

0.47

Serum Albumin, g/L

39 ± 2

36 ± 2

<0.001

Serum Magnesium, mmol/L

1.10 ± 0.13

1.08 ± 0.06

0.75

Serum Phosphorus, mmol/L

1.16 ± 0.15

1.00 ± 0.20

0.02

Serum 25(OH)D, nmol/L

54 ± 6

55 ± 11

0.70

Serum Parathyroid Hormone, ng/L

48 ± 19

43 ± 16

0.56

Serum Creatinine, μmol/L

77 ± 18

83 ± 13

0.44