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Table 2 Agreement and comparison of frequency between categories of the Likert scale between two observers

From: Evaluation of bone marrow aspirates in patients with acute myeloid leukemia at day 14 of induction therapy

Observer 1 Definitely free Probably free Doubtful Probably infiltrated Definitely infiltrated Total
Observer 2
Definitely free 13 4 2 2 0 21
Probably free 17 6 3 7 2 35
Doubtful 0 6 3 1 1 11
Probably infiltrated 1 0 4 9 5 19
Definitely infiltrated 0 0 0 3 18 21
Total 31 16 12 22 26 107
  1. Quadratic weighted kappa coefficient: Kw = 0.74, 95 % CI 0.64-0.83, p < 0.001)
  2. Modified McNemar test: X 2 = 0.28, p = 0.8