International classification of diseases codes showed modest sensitivity for detecting community-acquired pneumonia

Ewoudt M W van de Garde, Jan Jelrik Oosterheert, Marc Bonten, Robert C. Kaplan, Hubert G M Leufkens

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

Objective: To estimate the sensitivity of International Classification of Diseases (ICD-9-CM) coding for detecting hospitalized community-acquired pneumonia and to assess possible determinants for misclassification. Study Design and Setting: Based on microbiological analysis data, 293 patients with a principal diagnosis of community-acquired pneumonia at seven hospitals in the Netherlands were assigned to three categories (pneumococcal pneumonia, pneumonia with other organism, or pneumonia with no organism specified). For these patients, the assigned principal and secondary ICD-9-CM codes in the hospital discharge record were retrieved and the corresponding sensitivity was calculated. Furthermore, pneumonia-related patient characteristics were compared between correctly and incorrectly coded subjects. Results: The overall sensitivity was 72.4% for the principal code and 79.5% for combined principal and secondary codes. For pneumococcal pneumonia (ICD-9-CM code 481) and pneumonia with specified organism (ICD-9-CM code 482-483), the sensitivities were 35% and 18.3%, respectively. Patient characteristics were not significantly different between correctly and incorrectly coded subjects except for duration of hospital stay, which correlated negatively with coding sensitivity (P = 0.01). Conclusion: ICD-9-CM codes showed modest sensitivity for detecting community-acquired pneumonia in hospital administrative databases, leaving at least one quarter of pneumonia cases undetected. Sensitivity decreased with longer duration of hospital stay.

Original languageEnglish (US)
Pages (from-to)834-838
Number of pages5
JournalJournal of Clinical Epidemiology
Volume60
Issue number8
DOIs
StatePublished - Aug 2007

Fingerprint

International Classification of Diseases
Pneumonia
Pneumococcal Pneumonia
Length of Stay
Hospital Records
Netherlands
Databases

Keywords

  • Databases
  • Inpatients
  • International Classification of Diseases
  • Outcome assessment
  • Pneumonia
  • Sensitivity and specificity

ASJC Scopus subject areas

  • Medicine(all)
  • Public Health, Environmental and Occupational Health
  • Epidemiology

Cite this

International classification of diseases codes showed modest sensitivity for detecting community-acquired pneumonia. / van de Garde, Ewoudt M W; Oosterheert, Jan Jelrik; Bonten, Marc; Kaplan, Robert C.; Leufkens, Hubert G M.

In: Journal of Clinical Epidemiology, Vol. 60, No. 8, 08.2007, p. 834-838.

Research output: Contribution to journalArticle

van de Garde, Ewoudt M W ; Oosterheert, Jan Jelrik ; Bonten, Marc ; Kaplan, Robert C. ; Leufkens, Hubert G M. / International classification of diseases codes showed modest sensitivity for detecting community-acquired pneumonia. In: Journal of Clinical Epidemiology. 2007 ; Vol. 60, No. 8. pp. 834-838.
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