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    The impact of post-operative sepsis on mortality after hospital discharge among elective surgical patients: a population-based cohort study

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    Author
    Ou, L; Chen, J; Hillman, K; Flabouris, A; Parr, M; Assareh, H; Bellomo, R
    Date
    2017-02-20
    Source Title
    Critical Care (UK)
    Publisher
    BMC
    University of Melbourne Author/s
    Bellomo, Rinaldo
    Affiliation
    Medicine and Radiology
    Metadata
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    Document Type
    Journal Article
    Citations
    Ou, L., Chen, J., Hillman, K., Flabouris, A., Parr, M., Assareh, H. & Bellomo, R. (2017). The impact of post-operative sepsis on mortality after hospital discharge among elective surgical patients: a population-based cohort study. CRITICAL CARE, 21 (1), https://doi.org/10.1186/s13054-016-1596-7.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/258226
    DOI
    10.1186/s13054-016-1596-7
    Abstract
    BACKGROUND: Our aim in the present study was to assess the mortality impact of hospital-acquired post-operative sepsis up to 1 year after hospital discharge among adult non-short-stay elective surgical patients. METHODS: We conducted a population-based, retrospective cohort study of all elective surgical patients admitted to 82 public acute hospitals between 1 January 2007 and 31 December 2012 in New South Wales, Australia. All adult elective surgical admission patients who stayed in hospital for ≥4 days and survived to discharge after post-operative sepsis were identified using the Admitted Patient Data Collection records linked with the Registry of Births, Deaths, and Marriages. We assessed post-discharge mortality rates at 30 days, 60 days, 90 days and 1 year and compared them with those of patients without post-operative sepsis. RESULTS: We studied 144,503 survivors to discharge. Of these, 1857 (1.3%) had experienced post-operative sepsis. Their post-discharge mortality rates at 30 days, 60 days, 90 days and 1 year were 4.6%, 6.7%, 8.1% and 13.5% (vs 0.7%, 1.2%, 1.5% and 3.8% in the non-sepsis cohort), respectively (P < 0.0001 for all). After adjustment for patient and hospital characteristics, post-operative sepsis remained independently associated with a higher mortality risk (30-day mortality HR 2.75, 95% CI 2.14-3.53; 60-day mortality HR 2.45, 95% CI 1.94-3.10; 90-day mortality HR 2.31, 95% CI 1.85-2.87; 1-year mortality HR 1.71, 95% CI 1.46-2.00). Being older than 75 years of age (HR 3.50, 95% CI 1.56-7.87) and presence of severe/very severe co-morbidities as defined by Charlson co-morbidity index (severe vs normal HR 2.05, 95% CI 1.45-2.89; very severe vs normal HR 2.17, 95% CI 1.49-3.17) were the only other significant independent predictors of increased 1-year mortality. CONCLUSIONS: Among elective surgical patients, post-operative sepsis is independently associated with increased post-discharge mortality up to 1 year after hospital discharge. This risk is particularly high in the first month, in older age patients and in the presence of severe/very severe co-morbidities. This high-risk population can be targeted for interventions.

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