• Br J Anaesth · Oct 2022

    Long-term mortality following complications after elective surgery: a secondary analysis of pooled data from two prospective cohort studies.

    • Alexander J Fowler, Yize I Wan, John R Prowle, Michelle Chew, Douglas Campbell, Brian Cuthbertson, Duminda N Wijeysundera, Rupert Pearse, and Tom Abbott.
    • Faculty of Medicine and Dentistry, Queen Mary University of London, London, UK.
    • Br J Anaesth. 2022 Oct 1; 129 (4): 588597588-597.

    BackgroundComplications after surgery affect survival and quality of life. We aimed to confirm the relationship between postoperative complications and death within 1 yr after surgery.MethodsWe conducted a secondary analysis of pooled data from two prospective cohort studies of patients undergoing surgery in five high-income countries between 2012 and 2014. Exposure was any complication within 30 days after surgery. Primary outcome was death within 1 yr after surgery, ascertained by direct follow-up or linkage to national registers. We adjusted for clinically important covariates using a mixed-effect multivariable Cox proportional hazards regression model. We conducted a planned subgroup analysis by type of complication. Data are presented as mean with standard deviation (sd), n (%), and adjusted hazard ratios (aHRs) with 95% confidence intervals (CIs).ResultsThe pooled cohort included 10 132 patients. After excluding 399 (3.9%) patients with missing data or incomplete follow-up, 9733 patients were analysed. The mean age was 59 [sd 16.8] yr, and 5362 (55.1%) were female. Of 9733 patients, 1841 (18.9%) had complications within 30 days after surgery, and 319 (3.3%) died within 1 yr after surgery. Of 1841 patients with complications, 138 (7.5%) died within 1 yr after surgery compared with 181 (2.3%) of 7892 patients without complications (aHR 1.94 [95% CI: 1.53-2.46]). Respiratory failure was associated with the highest risk of death, resulting in six deaths amongst 28 patients (21.4%).ConclusionsPostoperative complications are associated with increased mortality at 1 yr. Further research is needed to identify patients at risk of complications and to reduce mortality.Copyright © 2022 The Author(s). Published by Elsevier Ltd.. All rights reserved.

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