Skip to main content

Table 4 Effects of control and soy foods on serum and urinary markers of bone metabolism

From: One year soy protein supplementation has positive effects on bone formation markers but not bone density in postmenopausal women

Measures

Control (n = 27)

Soy (n = 35)

Control vs Soy

 

Baseline

6 months

Final

Baseline

6 months

Final

P values

       

Trtmt

Time

Trtmt × Time

Serum

         

IGF-I (nmol/L)

17.9 ± 1.4b

20.5 ± 1.4a

20.2 ± 1.4a

13.3 ± 1.2c

16.8 ± 1.2ab

16.8 ± 1.2ab

0.023

< 0.001

0.693

IGFBP3 (ng/mL)

3833 ± 133

3934 ± 133

3904 ± 135

3442 ± 120b

3751 ± 120a

3622 ± 121a

0.087

0.005

0.252

Osteocalcin (ng/mL)

8.3 ± 2.1b

13.9 ± 2.1a

16.2 ± 2.2a

8.9 ± 1.9b

17.4 ± 2.0a

18.1 ± 2.0a

0.365

< 0.001

0.671

BSAP (U/L)

19.8 ± 1.2c

23.3 ± 1.2b

25.3 ± 1.2a

19.8 ± 1.1c

22.6 ± 1.1b

24.9 ± 1.1a

0.796

< 0.001

0.818

ALP (U/L)

57.4 ± 3.0c

65.9 ± 3.0b

74.0 ± 3.1a

56.6 ± 2.7c

69.1 ± 2.7b

74.3 ± 2.8a

0.798

< 0.001

0.499

Urine

         

Dpd (nmol/mmol creatinine)

5.3 ± 0.4

5.3 ± 0.4

4.9 ± 0.4

5.2 ± 0.3

5.4 ± 0.3

5.1 ± 0.3

0.888

0.234

0.744

  1. Values are least squares mean ± SE. IGF-I = insulin-like growth factor-I; IGFBP-3 = insulin-like growth factor binding protein-3; BSAP = bone-specific alkaline phosphatase; ALP = alkaline phosphatase; Dpd = deoxypyridinoline.
  2. Within each row, values that do not share the same superscript letters are significantly (P < 0.05) different from each other.