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05.07.2018 | Original Scientific Report

Associations of Hospital Length of Stay with Surgical Site Infections

Zeitschrift:
World Journal of Surgery
Autoren:
Edin Mujagic, Walter R. Marti, Michael Coslovsky, Savas D. Soysal, Robert Mechera, Marco von Strauss, Jasmin Zeindler, Franziska Saxer, Alexandra Mueller, Christoph A. Fux, Christoph Kindler, Lorenz Gurke, Walter P. Weber
Wichtige Hinweise
Edin Mujagic and Walter R. Marti have contributed equally to this work.

Abstract

Background

Surgical site infections (SSI) are a major cause of morbidity and mortality in surgical patients. Postoperative and total hospital length of stay (LOS) are known to be prolonged by the occurrence of SSI. Preoperative LOS may increase the risk of SSI. This study aims at identifying the associations of pre- and postoperative LOS in hospital and intensive care with the occurrence of SSI.

Methods

This observational cohort study includes general, orthopedic trauma and vascular surgery patients at two tertiary referral centers in Switzerland between February 2013 and August 2015. The outcome of interest was the 30-day SSI rate.

Results

We included 4596 patients, 234 of whom (5.1%) experienced SSI. Being admitted at least 1 day before surgery compared to same-day surgery was associated with a significant increase in the odds of SSI in univariate analysis (OR 1.65, 95% CI 1.25–2.21, p < 0.001). More than 1 day compared to 1 day of preoperative hospital stay did not further increase the odds of SSI (OR 1.08, 95% CI 0.77–1.50, p = 0.658). Preoperative admission to an intensive care unit (ICU) increased the odds of SSI as compared to hospital admission outside of an ICU (OR 2.19, 95% CI 0.89–4.59, p = 0.057). Adjusting for potential confounders in multivariable analysis weakened the effects of both preoperative admission to hospital (OR 1.38, 95% CI 0.99–1.93, p = 0.061) and to the ICU (OR 1.89, 95% CI 0.73–4.24, p = 0.149).

Conclusion

There was no significant independent association between preoperative length of stay and risk of SSI while SSI and postoperative LOS were significantly associated.

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