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

Table 7 Age and body mass index adjusted means (SEM) of bone mass (stiffness index^a and mBMD^b) by joint space narrowing status at the knee, distal interphalangeal (DIP), proximal interphalangeal (PIP), carpometacarpal/metacarpophalangeal (CMC/MCP) joints, ages 60 years over.

Joint space narrowing status	No.	Stiffness index^a	P value*	No.	mBMD^b	P value*
Knee
None	243	66.3 (0.6)		247	2.13 (0.02)
Questionable	65	63.9 (1.2)	0.08	66	2.04 (0.03)	0.01
Definite	91	66.3 (1.1)	0.97	92	2.14 (0.03)	0.73
DIP
None	113	65.9 (0.9)		115	2.11 (0.02)
Questionable	166	65.3 (0.8)	0.62	169	2.11 (0.02)	0.86
Definite	117	66.5 (0.9)	0.65	118	2.12 (0.02)	0.83
PIP
None	303	65.8 (0.6)		307	2.12 (0.01)
Questionable	88	66.7 (1.0)	0.43	90	2.12 (0.03)	0.99
Definite	8	62.4 (3.4)	0.34	8	2.07 (0.09)	0.63
CMC/MCP
None	330	65.5 (0.5)		334	2.11 (0.01)
Questionable	32	65.6 (1.8)	0.98	33	2.07 (0.04)	0.37
Definite	37	69.5 (1.6)	0.02	38	2.15 (0.04)	0.41

a: Stiffness index values were missing for 6 women. b: metacarpal bone mineral density. * P value versus women with no joint space narrowing.

ISSN: 1471-2474