Abstract
Purpose
Although several small-scale studies have reported risk factors for surgical site infection (SSI) after high tibial osteotomy (HTO), no study has collectively analysed risk factors in a large cohort. The present study aimed to clarify the risk factors for SSI after HTO using a national database.
Methods
Data of inpatients who underwent HTO from 2010 to 2017 were obtained from the Diagnosis Procedure Combination database in Japan. Outcome measures were the incidence of SSI and deep SSI after HTO. Associations between SSI and patient data were examined with multivariable logistic regression analysis.
Results
Among 12,853 patients who underwent HTO, 195 developed SSI (1.52%) and 50 developed deep SSI (0.39%). Univariate analysis showed that male sex, smoking, and longer anaesthesia duration were associated with higher incidences of SSI, whereas a primary diagnosis of osteonecrosis and use of natural bone grafts were associated with lower incidences. In multivariable analysis, SSI was positively associated with male sex, anaesthesia duration longer than 210 min (vs. 150–210 min), and use of artificial bone graft (vs. natural bone graft). SSI was negatively associated with age ≤ 49 years (vs. 50–59 years) and a primary diagnosis of osteonecrosis (vs. osteoarthritis).
Conclusion
The present study revealed novel risk factors for SSI after HTO that previous studies have failed to find, including use of artificial bone graft and longer anaesthesia duration; primary diagnosis of osteonecrosis and younger age were novel protective factors. These findings will help surgeons assess risks of SSI after HTO in individual patients.
Level of evidence
III.
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Abbreviations
- HTO:
-
High tibial osteotomy
- OA:
-
Osteoarthritis
- SSI:
-
Surgical site infection
- DPC:
-
Diagnosis Procedure Combination
- ICD-10:
-
International Classification of Diseases, 10th Revision
- ON:
-
Osteonecrosis
- OR:
-
Odds ratio
- CI:
-
Confidence interval
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This work was supported by grants from the Ministry of Health, Labour and Welfare, Japan (19AA2007 and H30-Policy-Designated-004) and the Ministry of Education, Culture, Sports, Science and Technology, Japan (17H04141). The funding bodies played no role in the design of the study; collection, analysis, or interpretation of the data; or writing of the manuscript.
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KF and HY collected the data. MK, TJ, ShT, HY, and SaT designed the study. MK, TJ, ShT, HI, RY, HM, and HY analysed and interpreted the data. MK, TJ, ShT, HI, RY, and HY drafted the manuscript. All authors had complete access to all data (including statistical reports and tables) used in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. All authors read and approved the final manuscript.
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The ethics committee of our institution approved the study design and waived the requirement for informed consent, because all data were anonymous (approval number: 3501).
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Kawata, M., Jo, T., Taketomi, S. et al. Type of bone graft and primary diagnosis were associated with nosocomial surgical site infection after high tibial osteotomy: analysis of a national database. Knee Surg Sports Traumatol Arthrosc 29, 429–436 (2021). https://doi.org/10.1007/s00167-020-05943-4
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DOI: https://doi.org/10.1007/s00167-020-05943-4