Table 2A.

The occurrence frequencies of MRI features per joint, comparing dominant versus nondominant hand. Values are % unless otherwise specified.

MRI Joint	Bilateral Hands	Unilateral Hand			Misdiagnosis by MRI
		Dominant	Nondominant	p^*	Unilateral Dominant Hand		Unilateral Nondominant Hand
		Dominant	Nondominant	p^*	Rate	p^*	Rate	p^*
Synovitis
Wrist	98	93	94	1	5	0.031	4	0.063
MCPJ2	70	59	58	1	11	< 0.001	12	< 0.001
MCPJ3	62	52	46	0.281	10	< 0.001	16	< 0.001
MCPJ4	66	61	47	0.002	5	0.031	19	< 0.001
MCPJ5	77	69	63	0.230	8	0.002	14	< 0.001
Osteitis
Wrist	95	90	90	1	5	0.031	5	0.031
MCPJ2	53	44	35	0.071	9	< 0.001	18	< 0.001
MCPJ3	48	38	33	0.362	10	< 0.001	15	< 0.001
MCPJ4	44	33	32	0.851	11	< 0.001	12	< 0.001
MCPJ5	55	43	42	0.856	12	< 0.001	13	< 0.001
Bone erosion
Wrist	98	98	98	1	0	1	0	1
MCPJ2	59	48	40	0.132	11	< 0.001	19	< 0.001
MCPJ3	48	34	36	0.856	14	< 0.001	12	< 0.001
MCPJ4	33	25	18	0.122	8	0.002	15	< 0.001
MCPJ5	49	38	32	0.311	11	< 0.001	17	< 0.001