• Ann Emerg Med · Sep 2023

    Development and Internal Validation of an Emergency Department Admission Intensity Measure Using Data From a National Group.

    • Jonathan J Oskvarek, Mark S Zocchi, Angela Cai, Arvind Venkat, Alexander T Janke, Arjun Venkatesh, Jesse M Pines, and US Acute Care Solutions Research Group.
    • US Acute Care Solutions, Canton, OH; Department of Emergency Medicine, Summa Health System, Akron, OH. Electronic address: oskvarekj@usacs.com.
    • Ann Emerg Med. 2023 Sep 1; 82 (3): 316325316-325.

    Study ObjectiveWe develop and assess variation in an emergency department (ED) admission intensity measure intended for value-based payment models. The measure includes ED diagnoses amenable to evidence-based protocols and where admission decisions vary based on physician discretion.MethodsMeasure International Classification of Diseases (ICD)-10 codes were selected by face validity by 3 emergency physicians using expertise and administrative data. Feedback was sought from a separate technical panel. Using data from a national group (2018 to 2019), we assessed measure stability at the physician and facility level by quarter using descriptive plots, multilevel linear probability models, and intraclass correlation coefficients (ICC).ResultsA total of 535 ICD-10 measure codes were selected from 23,590 codes. Across 127 EDs, facility-quarter admission rates averaged 26.1% (95% confidence interval [CI] 24.5 to 27.7). Between- and within-facility standard deviations were 9.2 (95% CI 8.2 to 10.5) and 2.9 (95% CI 2.7 to 3.0), respectively, with an ICC of 0.91. Most ED-quarters (749/961) fell within 2.5% of their facility's average. Among 2,398 physicians, quarterly rates averaged 29.1% (95% CI 28.6 to 29.6). The between- and within-physician standard deviation was 6.3 (95% CI 6.1 to 6.5) and 5.3 (95% CI 5.3 to 5.4), respectively, with an ICC of 0.58; 220 physicians (9.2%) had an admission rate consistently higher than average and 193 (8.0%) consistently lower.ConclusionThis set of ICD-10 diagnoses demonstrates face validity and stability for quarterly admission rates at the facility and physician levels. The measure may be useful to monitor facility admission rates in value-based models and reliably identify high and low admitters within facilities to manage admission variation.Copyright © 2022 American College of Emergency Physicians. Published by Elsevier Inc. All rights reserved.

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