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Table 6 Age and body mass index adjusted means (SEM) of bone mass (stiffness indexa and mBMDb) by osteophyte status at the knee, distal interphalangeal (DIP), proximal interphalangeal (PIP), carpometacarpal/metacarpophalangeal (CMC/MCP) joints, ages 60 years over.

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

Osteophyte status No. Stiffness indexa P value* No. mBMDb P value*
Knee       
   None 216 65.5 (0.7)   219 2.12 (0.02)  
   Questionable 74 67.7 (1.1) 0.10 75 2.12 (0.03) 0.89
   Definite 109 65.4 (1.0) 0.95 111 2.11 (0.02) 0.77
DIP       
   None 78 64.2 (1.1)   79 2.07 (0.03)  
   Questionable 192 66.8 (0.7) 0.06 195 2.11 (0.02) 0.26
   Definite 129 65.6 (0.9) 0.32 131 2.14 (0.02) 0.05
PIP       
   None 257 65.8 (0.6)   263 2.11 (0.02)  
   Questionable 133 66.2 (0.8) 0.76 133 2.14 (0.02) 0.29
   Definite 9 64.5 (3.2) 0.68 9 2.02 (0.08) 0.32
CMC/MCP       
   None 291 65.9 (0.6)   296 2.12 (0.01)  
   Questionable 71 64.2 (1.1) 0.18 71 2.06 (0.03) 0.10
   Definite 37 69.6 (1.6) 0.03 38 2.20 (0.04) 0.06
  1. a: Stiffness index values were missing for 6 women. b: metacarpal bone mineral density. * P value versus women with no osteophytes.