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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)

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

Origin of patient’s data Correlation coefficient r (95% CIs) p value Correlation coefficient r (95% CIs) p value
A vs B methods B vs C methods
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
  1. Bold indicates statistically significant results. p values < 0.05 were considered statistically significant
  2. US, ultrasound; CI, confidence intervals