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Table 2 Algorithm components and incidence rates

From: Automated surveillance of non-ventilator-associated hospital-acquired pneumonia (nvHAP): a systematic literature review

  1. 1)Worsening oxygenation: defined as at least 2 days of stable or improving oxygenation followed by at least 2 days of (1) decrease in daily minimum oxygen saturation from at least 95% in a patient on ambient air to less than 95%on ambient air, (2) initiation of supplemental oxygen, or (3) escalation of supplemental oxygen. All additional criteria were required to be present on the first or second day of worsening oxygenation
  2. 2)Chest imaging obtained
  3. 3)Three days of new antibiotics (less than 3 days of new antibiotics was allowed if the patient died on the first or second day of antibiotics)
  4. 4)Non-intubated patients
  5. 5)Respiratory culture obtained
  6. 6)ICD-10-Australian Modification
  7. 7)Chest radiology including text analysis (a natural language processing searching imaging reports for opacity descriptors consistent with new pneumonia that persisted for > 24 h)
  8. 8)Discharge diagnosis of pneumonia occurring > 48 h after admission
  9. 9)Respiratory and/or blood culture specimen positive for at least one gram-negative organism obtained at hospital day 3 or later for HAP
  10. 10)Antibiotic treatment on day of respiratory culture and for a subsequent 3 days or more, or until death or discharge
  11. 11)ICD-9 pneumonia as a secondary (not primary) diagnosis
  12. 12)Radiological procedures with reports not containing key phrases ruling out pneumonia, and not performed within 48h after admission (unless re-admission
  13. 13)Permanent absence of respiratory device during 48h before radiology
  14. 14)ICD-10 U 69.00 proxy code for hospital-acquired pneumonia
  15. 15)Positive blood culture from microbiology report
  16. 16)General clinical notes or discharge summaries were parsed and mapped to SNOMED-CT concepts (“Lung consolidation” or “pneumonitis”) using a Natural Language Processing (NLP) program
  17. 17)Positive blood culture from microbiology report (NLP)
  18. 18)(1) antibiotic prescription (ATC: J01) and (2) antibiotic prescription 48 h after ICU admission or time antibiotic prescription changed ≥ 48 h after ICU admission
  19. 19)Primary or associated diagnosis of ICU stay coded by anatomical site (ICD 10) as follows: Pneumonia J10-, J11-, J12-, J13-, J14-, J15-, J16-, J17-, J18
  20. 20)Chest radiology reports including text analysis with an existing NLP system (MedLEE) and chest radiology not performed within 48h after admission
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Antimicrobial Resistance & Infection Control

ISSN: 2047-2994

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