VOLUME 46 | NUMBER 6 | DECEMBER 2011
The Accuracy of Present-on-Admission Reporting in Administrative Data
Keywords: Present-on-admission; hospitals; accuracy; administrative data; quality measurement
Objective: To test the accuracy of reporting present-on-admission (POA) and to assess whether POA reporting accuracy differs by hospital characteristics.
Data Sources: We performed an audit of POA reporting of secondary diagnoses in 1,059 medical records from 48 California hospitals.
Study Design: We used patient discharge data (PDD) to select records with secondary diagnoses that are powerful predictors of mortality and could potentially represent comorbidities or complications among patients who either had a primary procedure of a percutaneous transluminal coronary angioplasty or a primary diagnosis of acute myocardial infarction, community-acquired pneumonia, or congestive heart failure. We modeled the relationship between secondary diagnoses POA reporting accuracy (over-reporting and under-reporting) and hospital characteristics.
Data Collection: We created a gold standard from blind reabstraction of the medical records and compared the accuracy of the PDD against the gold standard.
Principal Findings: The PDD and gold standard agreed on POA reporting in 74.3 percent of records, with 13.7 percent over-reporting and 11.9 percent under-reporting. For-profit hospitals tended to overcode secondary diagnoses as present on admission (odds ratios [OR] 1.96; 95 percent confidence interval [CI] 1.11, 3.44), whereas teaching hospitals tended to undercode secondary diagnoses as present on admission (OR 2.61; 95 percent CI 1.36, 5.03).
Conclusions: POA reporting of secondary diagnoses is moderately accurate but varies by hospitals. Steps should be taken to improve POA reporting accuracy before using POA in hospital assessments tied to payments.
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