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Table 1 ICC and agreement for single or up to five SULpeak selections

From: Quantitation of cancer treatment response by 2-[18F]FDG PET/CT: multi-center assessment of measurement variability using AUTO-PERCIST™

  ICC
(95% CI)
Agreement with readreference
ICC (Min, Max)
Baseline Follow-up Percentage change Baseline Follow-up Percentage change
1 SULpeak
(All reads)
0.90
(0.82, 0.94)
0.75
(0.64, 0.82)
0.87
(0.78, 0.92)
0.95
(0.72, 1.00)
0.78
(0.37, 1.00)
0.88
(0.61, 1.00)
1 SULpeak
(Reads with same tumor selected)
1.00
(0.49, 1.00)
1.00
(1.00, 1.00)
1.00
(1.00, 1.00)
0.95
(0.43, 1.00)
1.00
(1.00, 1.00)
1.00
(1.00, 1.00)
Sum of up to 5 SULpeak
(All reads)
0.93
(0.85, 0.96)
0.85
(0.67, 0.92)
0.77
(0.61, 0.85)
0.95
(0.84, 0.99)
0.89
(0.46, 0.99)
0.80
(0.39, 0.95)
Sum of up to 5 SULpeak
(Reads with same tumors selected)
0.98
(0.94, 0.98)
0.98
(0.94, 0.98)
0.96
(0.92, 0.98)
0.97
(0.95, 0.99)
0.98
(0.97, 1.00)
0.93
(0.87, 1.00)
  1. Agreement with readreference—ICC between reference reader and each of the other 12 readers
  2. ICC, intra-class correlation coefficient; CI, confidence interval; SULpeak, peak standardized uptake value corrected for lean body mass