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Table 8 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. (n = 567)

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   70.6 (0.6)    2.25 (0.02)  
   1–4   69.6 (0.6) 0.28   2.22 (0.01) 0.15
DIP       
   0   71.3 (1.0)    2.26 (0.02)  
   1–4   69.8 (0.5) 0.18   2.23 (0.01) 0.29
PIP       
   0   70.5 (0.5)    2.23 (0.01)  
   1–4   69.4 (0.7) 0.26   2.24 (0.02) 0.46
CMC/MCP       
   0   70.1 (0.5)    2.24 (0.01)  
   1–4   70.0 (0.9) 0.92   2.22 (0.02) 0.52
  1. a: Stiffness index values were missing for 10 women. b: metacarpal bone mineral density. *P value versus women with no OA.