Determinants of Hospital Length of Stay among Patients with Pneumonia Admitted to a Large Canadian Hospital from 1991 to 2001
Bibliographic record
Abstract
BACKGROUND: Pneumonia is a common reason for hospital admission, and the cost of treatment is primarily determined by length of stay (LOS). OBJECTIVES: To explore the changes to and determinants of hospital LOS for patients admitted for the treatment of community-acquired pneumonia over a decade of acute hospital downsizing. METHODS: Data were extracted from the database of Vancouver General Hospital, Vancouver, British Columbia, on patients admitted with community-acquired pneumonia (International Classification of Diseases, Ninth Revision, Clinical Modification codes 481.xx, 482.xx, 483.xx, 485.xx and 486.xx) from January 1, 1991 to March 31, 2001. The effects of sociodemographic factors, the specialty of the admitting physician (family practice versus specialist), admission from and/or discharge to a long-term care facility (nursing home) and year of admission, adjusted for comorbidity, illness severity measures and other potential confounders were examined. Longitudinal changes in these factors over the 10-year period were also investigated. RESULTS: The study population (n=2495) had a median age of 73 years, 53% were male and the median LOS was six days. Adjusted LOS was longer for women (10% increase, 95% CI 3 to 16), increasing age group (7% increase, 95% CI 4 to 10), admission under a family physician versus specialist (42% increase, 95% CI 32 to 52) and admission from home with subsequent discharge to a long-term care facility (75% increase, 95% CI 47 to 108). Adjusted hospital LOS decreased by an estimated 2% (95% CI 1 to 3) per annum. The mean age at admission and the proportion admitted from long-term care facilities both increased significantly over the decade (P<0.05). CONCLUSIONS: Results suggest that the management of hospitalized patients with pneumonia changed substantially between 1991 and 2001. The interface of long-term care facilities with acute care would be an important future area to explore potential efficiencies in caring for patients with pneumonia.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".