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Table 3 Evaluation of the agreement between reference and comparison algorithms and detection of their sensitivity. Lombardy, Italy, 2010

From: Can healthcare utilization data reliably capture cases of chronic respiratory diseases? a cross-sectional investigation in Italy

Algorithm # patients (prevalence %) Cohen’s Kappa a Sensitivity b
COPD (patients aged 40 years or older)
 Reference algorithm c 206,732 (3.6%) - 52.6%
 Permissive algorithm d 545,520 (9.4%) 0.46 72.9%
 Restrictive algorithm d 217,095 (3.8%) 0.75 51.0%
Asthma (patients aged 40 years or younger)
 Reference algorithm c 143,171 (3.3%) - 38.8%
 Permissive algorithm d 440,130 (10.1%) 0.35 63.4%
 Restrictive algorithm d 142,482 (3.3%) 0.61 30.6%
  1. aAgreement between reference and comparison (permissive and restrictive) algorithms; b Obtained from external validation data; c Please see Table 1 for details on reference algorithm; d Please see Table 2 for details on permissive and restrictive algorithms