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Table 9 Age and body mass index adjusted means (SEM) of bone mass (stiffness indexa and mBMDb) by osteoarthritis (OA) grade at the knee, distal interphalangeal (DIP), proximal interphalangeal (PIP), carpometacarpal/metacarpophalangeal (CMC/MCP) joints, ages 60 years over. (n = 405)

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

OA grades No. Stiffness indexa P value* No. mBMDb P value*
Knee       
   0   65.8 (0.8)    2.14 (0.02)  
   1–4   66.0 (0.6) 0.82   2.10 (0.02) 0.13
DIP       
   0   65.9 (1.4)    2.11 (0.04)  
   1–4   65.9 (0.5) 0.97   2.22 (0.01) 0.93
PIP       
   0   66.0 (0.6)    2.11 (0.02)  
   1–4   65.8 (0.7) 0.87   2.12 (0.02) 0.55
CMC/MCP       
   0   65.9 (0.6)    2.12 (0.01)  
   1–4   65.9 (0.9) 0.98   2.11 (0.02) 0.63
  1. a: Stiffness index values were missing for 10 women. b: metacarpal bone mineral density. *P value versus women with no OA.