Patrick Jung1, Arthur J Morris2, Mark Zhu3, Sally A Roberts4, Chris Frampton5, Simon W Young6. 1. Medical Student, School of Medicine, University of Auckland, Auckland. 2. Clinical Microbiologist, Auckland City Hospital, Clinical Lead for the Health Quality and Safety Commission's NZ SSIIP. 3. Fellow in Surgery, School of Medicine, University of Auckland, Auckland. 4. Clinical Microbiologist, Auckland City Hospital, Clinical Lead for the Health Quality and Safety Commission's Infection Prevention and Control Programmes. 5. Statistician, Dept of Orthopaedic Surgery & Musculoskeletal Medicine, University of Otago. 6. Consultant Orthopaedic Surgeon, Department of Orthopaedics, North Shore Hospital.
Abstract
AIM: To identify patient and surgical risk factors that are associated with periprosthetic joint infection (PJI), especially whether obesity is a risk factor following total hip arthroplasty (THA) and total knee arthroplasty (TKA). METHODS: New Zealand Surgical Site Infection Improvement Programme data was analysed using deep infection within 90 days of the index procedure as the outcome. This was tested against surgical and patient factors for statistical associations in a multivariate model. RESULTS: A total of 10,690 primary THAs and 9,481 primary TKAs were recorded by the NZSSIIP between 2013 and 2015. Multivariate analysis showed statistically significant associations with deep infections for BMI (BMI >40kg/m2 OR 5.62, 95% CI 2.25-14.0), male gender (OR 1.7, 95% CI 1.05-2.74) and age greater than 75 for THAs (age <55 years OR 0.35, 95% CI 0.14-0.87). For TKAs, multivariate analysis showed statistically significant associations with deep infection for BMI (BMI >40kg/m2 OR 1.94, 95% CI: 0.63-5.70) and male gender (OR 2.96, 95% CI 1.51-5.80). CONCLUSIONS: These findings show that obesity is one of the most important modifiable patient factors in predicting PJI following THA and TKA.
AIM: To identify patient and surgical risk factors that are associated with periprosthetic joint infection (PJI), especially whether obesity is a risk factor following total hip arthroplasty (THA) and total knee arthroplasty (TKA). METHODS: New Zealand Surgical Site Infection Improvement Programme data was analysed using deep infection within 90 days of the index procedure as the outcome. This was tested against surgical and patient factors for statistical associations in a multivariate model. RESULTS: A total of 10,690 primary THAs and 9,481 primary TKAs were recorded by the NZSSIIP between 2013 and 2015. Multivariate analysis showed statistically significant associations with deep infections for BMI (BMI >40kg/m2 OR 5.62, 95% CI 2.25-14.0), male gender (OR 1.7, 95% CI 1.05-2.74) and age greater than 75 for THAs (age <55 years OR 0.35, 95% CI 0.14-0.87). For TKAs, multivariate analysis showed statistically significant associations with deep infection for BMI (BMI >40kg/m2 OR 1.94, 95% CI: 0.63-5.70) and male gender (OR 2.96, 95% CI 1.51-5.80). CONCLUSIONS: These findings show that obesity is one of the most important modifiable patient factors in predicting PJI following THA and TKA.
Authors: E Schiffner; D Latz; A Karbowski; J P Grassmann; S Thelen; S Gehrmann; J Windolf; J Schneppendahl; P Jungbluth Journal: J Orthop Date: 2019-11-27
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