Results of the intra-observer test

Region assessedObserver AObserver BObserver C
Area of analysisGray-scale intensity meanGray-scale dispersionArea of analysisGray-scale intensity meanGray-scale dispersionArea of analysisGray-scale intensity meanGray-scale dispersion
Control
Patellar long-axis6.40%5.33%11.40%7.41%6.90%12.12%8.97%8.45%13.20%
Patellar short-axis9.49%7.91%10.24%8.11%7.72%10.53%7.16%8.91%12.93%
Achilles long-axis6.38%7.41%10.75%8.68%8.87%11.17%8.04%9.17%12.72%
Achilles short-axis11.57%4.10%9.98%9.23%5.57%10.00%12.09%10.04%9.00%
SpA patients
Patellar long-axis8.40%7.14%13.18%6.98%8.25%14.14%8.54%8.95%12.94%
Patellar short-axis10.03%5.62%11.73%11.15%8.84%12.17%12.21%7.99%10.20%
Achilles long-axis5.44%6.82%12.38%6.84%9.54%11.26%7.99%10.59%14.08%
Achilles short-axis9.83%6.14%9.10%10.18%8.04%10.05%13.15%11.90%10.28%

Percentages represent the mean of the proportion of the difference between the highest and lowest determination obtained by each observer of the same image in two different moments