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Metadata from Data: Identifying Holidays from Anesthesia Data

  • Systems-Level Quality Improvement
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Abstract

The increasingly large databases available to researchers necessitate high-quality metadata that is not always available. We describe a method for generating this metadata independently. Cluster analysis and expectation-maximization were used to separate days into holidays/weekends and regular workdays using anesthesia data from Vanderbilt University Medical Center from 2004 to 2014. This classification was then used to describe differences between the two sets of days over time. We evaluated 3802 days and correctly categorized 3797 based on anesthesia case time (representing an error rate of 0.13 %). Use of other metrics for categorization, such as billed anesthesia hours and number of anesthesia cases per day, led to similar results. Analysis of the two categories showed that surgical volume increased more quickly with time for non-holidays than holidays (p < 0.001). We were able to successfully generate metadata from data by distinguishing holidays based on anesthesia data. This data can then be used for economic analysis and scheduling purposes. It is possible that the method can be expanded to similar bimodal and multimodal variables.

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Acknowledgments

Maxim Terekhov for his help in conducting and compiling the statistical analysis.

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Competing interests

None.

Funding

This work was supported by Department of Anesthesiology funds. Additionally, Dr. Wanderer is funded by the Foundation for Anesthesia Education and Research (FAER) Health Service Research Mentored Research Training Grant (HSR-MRTG).

Ethical approval

This research was exempt from IRB approval because it does not meet the requirements for human subjects research.

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Authors and Affiliations

  1. Department of Anesthesiology, Vanderbilt University Medical Center, 1301 Medical Center Dr., Nashville, TN, 37232, USA

    Joseph R. Starnes, Jonathan P. Wanderer & Jesse M. Ehrenfeld

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  1. Joseph R. Starnes
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  2. Jonathan P. Wanderer
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  3. Jesse M. Ehrenfeld
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Corresponding author

Correspondence to Joseph R. Starnes.

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This article is part of the Topical Collection on Systems-Level Quality Improvement.

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Starnes, J.R., Wanderer, J.P. & Ehrenfeld, J.M. Metadata from Data: Identifying Holidays from Anesthesia Data. J Med Syst 39, 44 (2015). https://doi.org/10.1007/s10916-015-0232-4

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  • DOI: https://doi.org/10.1007/s10916-015-0232-4

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