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Table 2 Inter-rater correlation and percentage agreement of the presence or absence of morbidity as measured by the POMS

From: Measuring outcomes after major abdominal surgery during hospitalization: reliability and validity of the Postoperative Morbidity Survey

 

Day 1 (n = 51)

Day 2 (n = 51)

Day 3 (n = 51)

Day 4 (n = 46)

Day 5 (n = 40)

Total (n = 263)

Percentage agreement (%)

100

100

100

95.7

95

97.7

κ correlation coefficient (95% CI)

N/A

1.0 (1.0-1.0)

1.0 (1.0-1.0)

0.873 (0.760-1.0)

0.895 (0.760-1.0)

0.912 (0.842-0.982)

  1. When observers scored all patients the same the hypothetical probability of chance could not be calculated, and are labeled N/A.