Table 3.

Correlation between ultrasonography and histological findings

	B mode synovitis grade (r)	B mode synovial thickness (r)	Power Doppler grade (r)
Superior
Histological inflammation score	0.48†	0.35	0.27
Histological lining layer thickness score	0.48†	0.44†	0.23
Histological vascularisation score	0.42	0.38	0.17
CD68 score	0.42†	0.37	0.20
FVIII score	0.38	0.18	0.27
Medial
Histological inflammation score	0.24	0.26	0.11
Histological lining layer thickness score	0.53*	0.44†	0.22
Histological vascularisation score	0.23	0.16	0.13
CD68 score	0.45†	0.49†	0.52*
FVIII score	0.27	0.15	0.22
Lateral
Histological inflammation score	0.67*	0.69*	0.65*
Histological lining layer thickness score	0.55*	0.69*	0.66*
Histological vascularisation score	0.77*	0.88**	0.61*
CD68 score	0.50†	0.48*	0.30
FVIII score	0.78*	0.84*	0.74*
Overall median scores
Histological inflammation score	0.63*	0.65**	0.62*
Histological lining layer thickness score	0.64*	0.61*	0.77**
Histological vascularisation score	0.60*	0.57*	0.68**
CD68 score	0.49*	0.59*	0.63*
FVIII score	0.36	0.41†	0.33

†P<0.1; *P<0.05; **P<0.001; ***P<0.0001.

FVIII, factor VIII staining; r, correlation coefficient.