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Table 3 Comparison of methods for diagnostic accuracy of diabetic foot ulcers (N = 518)

From: Diagnostic accuracy of existing methods for identifying diabetic foot ulcers from inpatient and outpatient datasets

Method Chart review* Accuracy and agreement measures (95% CI)
   Yes No Sensitivity Specificity PPV NPV Kappa
Holzer Yes 148 59 94.9 83.7 71.5 98.4 0.69
  No 8 303 (90.1-97.8) (79.5-87.4) (64.8-77.5) (97.9-98.7) (0.66-0.72)
Mayfield Yes 152 95 97.4 73.8 61.5 98.5 0.64
  No 4 267 (93.6-99.3) (68.9-78.2) (55.2-67.6) (98.0-98.8) (0.61-0.67)
Ramsey Yes 144 31 92.3 91.4 82.3 98.3 0.73
  No 12 331 (86.9-96.0) (88.1-94.1) (75.8-87.6) (97.8-98.7) (0.70-0.76)
Harrington Yes 147 36 94.2 90.1 80.3 98.4 0.73
  No 9 326 (89.3-97.3) (86.5-92.9) (73.8-85.8) (97.9-98.7) (0.70-0.76)
New Yes 145 33 92.9 90.9 81.5 98.3 0.73
  No 11 329 (87.7-96.4) (87.4-93.6) (75.0-86.9) (97.9-98.7) (0.70-0.76)
  1. * Chart reviews identified whether there was any indication of a diabetic foot ulcer in the electronic medical records during October 1, 2002-September 30, 2003.
  2. PPV refers to positive predictive values and NPV, negative predictive values. PPV, NPV, and kappa coefficients were weighted.