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Table 2 Cohen’s κ and frequency (%) of agreement and disagreement of RAI-MDS and prescription drug data on medication class use

From: Agreement between administrative data and the Resident Assessment Instrument Minimum Dataset (RAI-MDS) for medication use in long-term care facilities: a population-based study

  Anti-Psychotic Anti-Depressant Anti-Anxiety or Hypnotic
Cohen’s κ (95% Confidence Interval)
All ages 0.85 (0.83, 0.86) 0.83 (0.82, 0.85) 0.40 (0.38, 0.42)
<65 years 0.81 (0.77, 0.86) 0.84 (0.79, 0.88) 0.46 (0.39, 0.54)
65+ years 0.85 (0.84, 0.86) 0.83 (0.82, 0.85) 0.39 (0.37, 0.41)
Males 0.82 (0.80, 0.84) 0.79 (0.76, 0.81) 0.39 (0.35, 0.43)
Females 0.86 (0.84, 0.87) 0.85 (0.84, 0.87) 0.40 (0.38, 0.43)
Frequency (%) of Agreement/Disagreement
Positive Agreement: In RAI-MDS and Prescription Drug Data 2851 (32.2) 3087 (34.8) 1054 (11.9)
Negative Agreement: In neither RAI-MDS nor Prescription Drug Data 5385 (60.7) 5079 (57.3) 5925 (66.8)
Disagreement: In RAI-MDS & Not in Prescription Drug Data 311 (3.5) 273 (3.1) 1347 (15.2)
Disagreement: Not in RAI-MDS & in Prescription Drug Data 319 (3.6) 427 (4.8) 540 (6.1)
Total 8866 (100.0) 8866 (100.0) 8866 (100.0)