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1 Dept of Medicine, 2 Dept of Mathematical and Statistical Sciences and 4 Dept of Critical Care Medicine, University of Alberta, and 3 Information Analysis, Alberta Health and Wellness, Alberta, Canada
CORRESPONDENCE: D. Johnson, 368 O'Connor Close, Edmonton, Alberta T6R 1L4, Canada. Fax: 1 7804359083. E-mail: cujecjohnson@shaw.ca
Keywords: community-acquired pneumonia, health-service utilisation, physician practice
Received: December 12, 2002
Accepted February 28, 2003
This work was partially supported by the Alberta Center for Health Service Utilisation Research.
The association of mortality with patient factors (severity of illness, comorbidity), physician factors (specialty training, prehospitalisation visit, in-hospital consultation, volume of patients seen per physician) and healthcare organisation factors (patient-travel distances, regional beds per capita, admitting hospital-bed occupancy, admitting hospital-bed turnover, hospital location, volume of pneumonia cases per hospital) after hospital admission with community-acquired pneumonia was investigated using administrative data from Alberta, Canada from April 1, 1994–March 31, 1999.
During the 5-yr study period there were 43,642 pneumonia hospitalisations, with an 11% in-hospital and 26% 1-yr mortality. Patient severity of illness and comorbidity were the strongest predictors of increased mortality. Physicians with the highest in-hospital pneumonia patient volume (>27 patients·yr–1) cared for patients with greater severity/comorbidity, but with decreased odds of in-hospital mortality, compared with the lowest volume physicians (less than seven patients per year).
The effects of internal medicine specialist or subspecialist care were mixed, with a reduction in deaths for the first 72 h and an increase in in-hospital deaths. Pre-hospitalisation visit by a physician was associated with decreased mortality. Healthcare organisation factors were the least strong predictor of mortality, demonstrating an effect only for 1-yr mortality in those discharged alive from hospital. Admissions to larger volume or metropolitan hospitals were associated with a decrease in mortality.
Severity of illness and comorbidity had the strongest association with mortality. The first association of high-volume physician and pre-hospital care with decreased in-hospital mortality for community-acquired pneumonia is reported.
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