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    Hospital effect on infections after four major surgeries: Outlier and volume-outcome analysis using all-inclusive state data

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    Open Access Accepted Manuscript (2.032Mb)
    Date
    2017
    Author
    Furuya-Kanamori, Luis
    Doi, Suhail A.R.
    Smith, Paul N.
    Bagheri, Nasser
    Clements, Archie C.A.
    Sedrakyan, Art
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    Abstract
    Hospital volume is known to have a direct impact on outcomes of major surgeries. However, it is unclear if the evidence applies specifically to surgical site infections. To determine if there are procedure-specific hospital outliers (with higher surgical site infection rates [SSIR]) for four major surgical procedures, and to examine if hospital volume is associated with SSIR in the context of outlier performance in New South Wales (NSW), Australia. Adults who underwent one of four surgical procedures (colorectal, joint replacement, spinal and cardiac procedures) at a NSW healthcare facility from 2002 through 2013 were included. The hospital volume for each of the four surgical procedures was categorised into tertiles (low, medium and high). Multivariable logistic regression models were built to estimate the expected SSIR for each procedure. The expected SSIR were used to compute an indirect standardised SSIR which was then plotted in funnel plots to identify hospital outliers. One hospital was identified to be an overall outlier (higher SSIR for 3 out of the 4 procedures performed in its facilities); whereas two hospitals were outliers for one specific procedure throughout the entire study period. Low-volume facilities performed the best for colorectal surgery and worst for joint replacement and cardiac surgery. One high-volume facility was an outlier for spinal surgery. Surgical site infections seem to be mostly a procedure-specific as opposed to a hospital-specific phenomenon in NSW. The association between hospital volume and SSIRs differs for different surgical procedures.
    DOI/handle
    http://dx.doi.org/10.1016/j.jhin.2017.05.021
    http://hdl.handle.net/10576/5555
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