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Table 2 Category-specific and overall intra-rater reliability coefficients

From: Examining intra-rater and inter-rater response agreement: A medical chart abstraction study of a community-based asthma care program

  Percentage agreement Kappa
Category (number of items) Category % % range across items Category κ 95% CI κ range across items
1. Physical assessment (8) 94 91–98 0.84 (0.81–0.87) 0.72–0.90
2. Asthma control (7) 92 85–95 0.83 (0.80–0.86) 0.60–0.88
3. Spirometry (6) 95 91–97 0.84 (0.80–0.86) 0.78–0.94
4. Asthma education (8) 91 78–95 0.72 (0.68–0.76) 0.55–0.82
5. Asthma referrals (3) 94 92–93 0.59 (0.46–0.71) 0.44–0.65
6. Medications (1) 94 94 0.51 (0.27–0.75) 0.51
Overall 93   0.81* (0.80–0.83)  
  1. * Chi-square test statistic for homogeneity = 47, df = 5, p < 0.0001
  2. Abbreviations: κ kappa statistic, CI confidence interval