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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
0.91 1.00
Clinical benefit vs. no benefit
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)