Table 3.

Convergent and divergent relationships.

	A		B		C		D
	Intra-domain	Inter-domain	Intra-domain	Inter-domain	Intra-domain	Inter-domain	Intra-domain	Inter-domain
Pain	0.82	0.32	0.53	0.26	0.66	0.53	0.62	0.37
Tenderness	Single	0.32	0.59	0.21	Single	0.58	ND	ND
Fatigue	0.64	0.5	0.37	0.27	0.62	0.52	0.66	0.43
Sleep	Single	0.49	0.25	0.23	Single	0.52	0.3	0.26
Depression	0.63	0.42	0.37	0.22	0.64	0.36	0.58	0.35
Physical function	0.65	0.45	0.31	0.27	0.66	0.44	0.69	0.35
Multidimensional function	0.57	0.61	0.3	0.27	0.55	0.48	Single	0.5
Dyscognition	Single	0.23	ND	ND	ND	ND	ND	ND
Anxiety	Single	0.4	0.32	0.24	0.6	0.4	0.58	0.38
Stiffness	Single	0.57	Single	0.19	Single	0.57	ND	ND

Single: Single instrument; ND: not done.