A semiquantitative color Doppler ultrasound scoring system for evaluation of synovitis in joints of patients with blood-induced arthropathy

Insights into Imaging

Table 4 Associations between a subjective semi-quantitative color Doppler US scoring method (A), a quantitative color Doppler method for synovial vascularity (B) and a quantitative gray-scale US method for single-layer synovial hypertrophy (C)

Origin of patient’s data	Correlation coefficient r (95% CIs)	p value	Correlation coefficient r (95% CIs)	p value
Origin of patient’s data	A vs B methods	p value	B vs C methods	p value
A. Canada US operator
	Reader 1		Reader 1
Canada Data	0.72 (0.47, 0.86)	< 0.0001	0.43 (0.08, 0.69)	0.02
China Data	0.76 (0.56, 0.87)	< 0.0001	0.66 (0.40, 0.82)	< 0.0001
	Reader 2		Reader 2
Canada Data	0.63 (0.34, 0.81)	0.0001	0.44 (0.08, 0.69)	0.02
China Data	0.79 (0.62, 0.89)	< 0.0001	0.60 (0.34, 0.78)	< 0.0001
B. China US operator
	Reader 1		Reader 1
Canada Data	0.63 (0.34, 0.81)	0.0001	0.44 (0.08, 0.69)	0.0151
China Data	0.79 (0.62, 0.89)	< 0.0001	0.60 (0.34, 0.78)	< 0.0001
	Reader 2		Reader 2
Canada Data	0.84 (0.68, 0.92)	< 0.0001	0.64 (0.35, 0.81)	< 0.0001
China Data	0.85 (0.71, 0.92)	< 0.0001	0.61 (0.33, 0.79)	0.0001

Bold indicates statistically significant results. p values < 0.05 were considered statistically significant
US, ultrasound; CI, confidence intervals