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Fig. 1 | BMC Health Services Research

Fig. 1

From: Healthcare utilization and costs associated with S. aureus and P. aeruginosa pneumonia in the intensive care unit: a retrospective observational cohort study in a US claims database

Fig. 1

Inclusion/exclusion criteria, cohort definition, and patient counts. Cohort 1: Controls (no pneumonia); excluded the following conditions and Cohort 2 and Cohort 3: Viral pneumonia (ICD-9 dx 480.xx); Other pneumonia with specified bacteria: Pneumococcal pneumonia (481.xx), Other specified bacterial pneumonia (482.0x, 482.2x, 482.3x, 482.8x), Bronchopneumonia (485.xx); Pneumonia due to unspecified bacteria: Unspecified bacterial pneumonia (482.9x), Pneumonia, organism unspecified [bacterial or viral] (486.xx), Ventilator associated pneumonia (VAP) (997.31); Other pneumonias: Aspiration Pneumonia (507.0x), Post-procedural pneumonia (997.32); Septicemia due to staphylococcus or pseudomonas: Staphylococcal septicemia, unspecified (038.10), Methicillin susceptible Staphylococcus aureus septicemia (038.11), Methicillin resistant Staphylococcus aureus septicemia (038.12), Septicemia due to pseudomonas (038.43); Other bacterial infections due to staphylococcus or pseudomonas: Staphylococcus, unspecified (041.10), Methicillin susceptible Staphylococcus aureus (041.11), Methicillin resistant Staphylococcus aureus (041.12), Pseudomonas (041.7); Staphylococcal meningitis (320.3x); Bacteremia (790.7x). Cohort 2: Pneumonia due to staphylococcus (ICD-9 diagnosis: 482.4x). Cohort 3: Pneumonia due to pseudomonas (ICD-9 diagnosis: 482.1x). Cohort 2 and Cohort 3 are not necessarily mutually exclusive. Patients with diagnosis codes for both pneumonia due to staphylococcus and pneumonia due to pseudomonas during the index hospitalization visit are included in both cohorts (N = 132)

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