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Table 2 Inter-rater reliability of readers on response assessment

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

  Krippendorff alpha coefficient
of 13 readers on response
  All reads
(n = 380a)
Reads with same target (n = 270a)
Response vs. no response
(CMR/PMR vs. SMD/PMD)
0.91 1.00
Clinical benefit vs. no benefit
(CMR/PMR/SMD vs. PMD)
0.81 1.00
Response categories (ordinal scale)
CMR vs. PMR vs. SMD vs. PMD
0.86 1.00
  1. aReads with missing response were excluded (10 for all reads and 1 for reads with same target)