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Table 1 Baseline data

From: Correlation between intervertebral disc degeneration and bone mineral density difference: a retrospective study of postmenopausal women using an eight-level MRI-based disc degeneration grading system

 

Decades

51-60y

61-70y

71-80y

81-90y

n

26

45

35

8

Age(y)

57.7(1.9)

65.4(2.5)

75.9(2.8)

82.5(2.1)

Age of menopause(y)

50.2(3.0)

49.0(5.1)

48.3(2.7)

48.8(3.6)

Height(m)

1.64(0.06)

1.61(0.06)

1.57(0.06)

1.53(0.05)

Weight(kg)

66.9(13.1)

64.3(8.4)

61.1(11.6)

58.1(7.6)

Body mass index(kg/m2)

24.6(3.5)

24.8(3.5)

24.9(4.4)

24.9(4.2)

L1 BMD(g/cm2)

1.027(0.142)

0.858(0.178)

0.858(0.208)

0.857(0.150)

L2 BMD(g/cm2)

1.066(0.122)

0.932(0.167)

0.903(0.219)

0.929(0.206)

L3 BMD(g/cm2)

1.146(0.152)

1.014(0.200)

0.959(0.215)

1.001(0.214)

L4 BMD(g/cm2)

1.147(0.182)

1.039(0.202)

1.006(0.239)

1.079(0.236)

L2-L1 BMD difference(g/cm2)

0.038(0.076)

0.074(0.087)

0.045(0.080)

0.072(0.082)

L3-L2 BMD difference(g/cm2)

0.080(0.087)

0.082(0.101)

0.056(0.077)

0.072(0.086)

L4-L3 BMD difference(g/cm2)

0.001(0.108)

0.026(0.094)

0.046(0.093)

0.078(0.087)

T-score(SD)

-0.8(1.0)

-2.0(1.3)

-2.1(1.6)

-2.2(1.0)