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Table 4 Age and body mass index adjusted means (SEM) of bone mass (stiffness indexa and mBMDb) by joint space narrowing status at the knee, distal interphalangeal (DIP), proximal interphalangeal (PIP), carpometacarpal/metacarpophalangeal (CMC/MCP) joints.

From: Appendicular bone mass and knee and hand osteoarthritis in Japanese women: a cross-sectional study

Joint space narrowing status

No.

Stiffness indexa

P value*

No.

mBMDb

P value*

Knee

      

   None

374

70.6 (0.5)

 

381

2.24 (0.01)

 

   Questionable

85

67.8 (1.1)

0.02

87

2.17 (0.03)

0.02

   Definite

98

70.3 (1.1)

0.84

99

2.27 (0.03)

0.31

DIP

      

   None

214

70.6 (0.7)

 

219

2.24 (0.02)

 

   Questionable

214

69.1 (0.7)

0.14

217

2.22 (0.02)

0.37

   Definite

126

70.8 (0.9)

0.90

128

2.25 (0.03)

0.71

PIP

      

   None

442

70.1 (0.5)

 

450

2.23 (0.01)

 

   Questionable

107

70.3 (1.0)

0.89

109

2.23 (0.02)

0.99

   Definite

8

67.1 (3.6)

0.40

8

2.19 (0.09)

0.66

CMC/MCP

      

   None

480

69.8 (0.4)

 

488

2.23 (0.01)

 

   Questionable

36

70.4 (1.7)

0.74

37

2.18 (0.04)

0.21

   Definite

41

73.4 (1.6)

0.03

42

2.26 (0.04)

0.49

  1. a: Stiffness index values were missing for 10 women. b: metacarpal bone mineral density. * P value versus women with no joint space narrowing.