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Risk Assessment for Surgical-Site Infections in Orthopedic Patients

Published online by Cambridge University Press:  02 January 2015

Annette S. de Boer ,
A. Joke Mintjes-de Groot ,
Antonius J. Severijnen ,
Jan Maarten J. van den Berg  and
Wilfrid van Pelt
Annette S. de Boer*
Affiliation:
National Institute of Public Health and the Environment, Bilthoven, Utrecht, The Netherlands
A. Joke Mintjes-de Groot
Affiliation:
National Organization for Quality Assurance in Health Care, Utrecht, The Netherlands
Antonius J. Severijnen
Affiliation:
National Institute of Public Health and the Environment, Bilthoven, Utrecht, The Netherlands
Jan Maarten J. van den Berg
Affiliation:
National Organization for Quality Assurance in Health Care, Utrecht, The Netherlands
Wilfrid van Pelt
Affiliation:
National Institute of Public Health and the Environment, Bilthoven, Utrecht, The Netherlands
*
National Institute of Public Health and the Environment, PO Box 1, 3720 BA Bilthoven, The Netherlands
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Abstract

Objective:

To assess the relative importance of risk factors for surgical-site infections (SSIs) in orthopedic patients and thereby determine which risk factors to monitor in the national surveillance of SSI in The Netherlands.

Design:

Reanalysis of data on SSI and associated risk factors from two surveillance projects on nosocomial infections, carried out in 1992 and 1993 in The Netherlands: Project Surveillance Nosocomial Infections in the region of Utrecht (PSZU) and the first Project Surveillance Surgical Wound Infections (SWIFT-1). Odds ratios (ORs) were calculated for age, gender, preoperative stay, and the number of operations. In addition, in PSZU, other nosocomial infections, and, in SWIFT-1, prophylactic antibiotics, acute surgery, and wound contamination were studied.

Participants:

The study was confined to hospitalized orthopedic patients (PSZU, 4,872; SWIFT-1, 6,437).

Results:

In PSZU, the following ORs were significant in a multivariate model: age 0-44 years, 1.0; 45-64 years, 1.6; 65-74 years, 4.7; and 75-99 years, 6.0. For a preoperative stay over 4 days, the OR was 3.3 (95% confidence interval [CI95], 2.5-4.0), and for multiple surgery, 2.5 (CI95, 1.9-3.0). For females, the OR was 0.8 (not significant). The same model applied to SWIFT-1 gave similar ORs. Adjustment for additional nosocomial infections (PSZU) decreased the ORs for ages over 65 years remarkably. The OR for additional nosocomial infections in patients under 65 years of age was 15.6 (CI95, 4.3-57.4). Adjustment for prophylactic antibiotics, acute surgery, and wound-contamination class (SWIFT-1) did not influence the ORs of the original model, but showed that wound-contamination class was an important risk factor.

Conclusions:

Age, additional nosocomial infections, wound-contamination class, preoperative stay, and the number of operations were identified as important risk factors for SSI in Dutch orthopedic patients.

Type
Original Articles
Information
Infection Control & Hospital Epidemiology , Volume 20 , Issue 6 , June 1999 , pp. 402 - 407
Copyright
Copyright © The Society for Healthcare Epidemiology of America 1999

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