Table 5

Intrareader and inter-reader agreement on tenosynovitis for baseline and 6-week status and change in score of the two methods for scoring tenosynovitis (two-way random effect model, single measure ICCs, average measures ICCs, SDD and MDC)

MethodICCMeasureBaseline6 WeekChange
Current studyICC intrareaderReader 1
 SmICC0.95 (0.86 to 0.98)0.92 (0.80 to 0.97)0.78 (0.48 to 0.92)
 AvmICC0.97 (0.92 to 0.99)0.96 (0.89 to 0.98)0.88 (0.65 to 0.95)
 SDD3.093.293.39
 MDC (%)11.912.713.01
Reader 2
 SmICC0.98 (0.94 to 0.99)0.93 (0.81 to 0.97)0.94 (0.84 to 0.98)
 AvmICC0.99 (0.97 to 0.99)0.96 (0.89 to 0.98)0.97 (0.91 to 0.99)
 SDD2.162.22.28
 MDC (%)8.38.58.8
ICC inter-readerSmICC0.91 (0.74 to 0.96)0.80 (0.33 to 0.93)0.62 (0.20 to 0.85)
Haavardsholm et al5ICC intrareaderAvmICC Reader 10.95 (0.85 to 0.98)0.89 (0.48 to 0.96)0.76 (0.33 to 0.92)
 SmICC0.93 (0.83 to 0.97)0.93 (0.83 to 0.97)0.72 (0.37 to 0.89)
 AvmICC0.96 (0.90 to 0.98)0.96 (0.90 to 0.98)0.84 (0.54 to 0.94)
 SDD2.072.402.76
 MDC (%)6.97.99.2
Reader 2
 SmICC0.97 (0.92 to 0.99)0.81 (0.55 to 0.93)0.87 (0.66 to 0.95)
 AvmICC0.98 (0.96 to 0.99)0.90 (0.71 to 0.96)0.93 (0.80 to 0.97)
 SDD1.382.452.50
 MDC (%)4.68.28.4
ICC inter-readerSmICC0.59 (0 to 0.87)0.51 (0 to 0.80)0.68 (0.29 to 0.88)
AvmICC0.74 (0 to 0.93)0.67 (0 to 0.89)0.81 (0.45 to 0.93)
  • Values are mean (95% CI).

  • AvmICC, average measure intraclass correlation coefficient; ICC, intraclass correlation coefficient; MDC, minimal detectable change;

  • SDD, smallest detectable difference; SmICC, single measure intraclass correlation coefficient.