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Table 3 Positive predictive values for each skin and soft tissue infection identification algorithm

From: Use of electronic health record data to identify skin and soft tissue infections in primary care settings: a validation study

  Initial visits All visits
SSTI identification criteria True positives/encounters PPV (95% CI) True positives/encounters PPV (95% CI)
ICD-9 or CPT code or positive culture 413/514 80.4 (76.9-83.8) 617/731 84.4 (81.8-87.0)
ICD-9 SSTI code only 404/455 88.8 (85.9-91.7) 607/669 90.7 (88.5-92.9)
Cellulitis/Abscess ICD-9 code 228/254 89.8 (086.0-93.5) 410/448 91.5 (88.9-94.1)
Cellulitis/Abscess ICD-9 code, body site specific 116/214 54.2 (47.5-60.9) 204/388 52.6 (47.6-57.6)
  1. Note: SSTI, skin and soft tissue infection; ICD-9, International Classification of Diseases, Ninth Revision; CPT, current procedural terminology; CI, confidence interval.