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Table 4 Agreement and comparison of frequency between grouped 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
Observer 2 Free* Infiltrated** Total
Free* 54 14 68
Infiltrated** 4 35 39
Total 58 49 107
  1. *definitely free, probably free and doubtful; **probably infiltrated and definitely infiltrated
  2. Kappa (K = 0.66, 95 % CI 0.51 - 0.80, p < 0.001)
  3. McNemar (X 2 = 2.28, p = 0.1)