Ali J Electricwala1, Rapeepat Narkbunnam2, James I Huddleston3, William J Maloney3, Stuart B Goodman3, Derek F Amanatullah3. 1. Department of Orthopaedic Surgery, Stanford University, Redwood City, California; Department of Orthopaedic Surgery, Sancheti Institute of Orthopaedics and Rehabilitation, Pune, Maharashtra, India. 2. Department of Orthopaedic Surgery, Stanford University, Redwood City, California; Department of Orthopaedic Surgery, Siriraj Hospital, Bangkok, Thailand. 3. Department of Orthopaedic Surgery, Stanford University, Redwood City, California.
Abstract
BACKGROUND: Obesity affects more than half a billion people worldwide, including one-third of men and women in the United States. Obesity is associated with higher postoperative complication rates after total hip arthroplasty (THA). It remains unknown whether obese patients progress to revision THA faster than nonobese patients. METHODS: A total of 257 consecutive primary THAs referred to an academic tertiary care center for revision THA were retrospectively stratified according to preoperative body mass index (BMI), reason for revision THA, and time from primary to revision THA. RESULTS: When examining primary THAs referred for revision THA, increasing BMI adversely affected the mean time to revision THA. The percentage of primary THAs revised at 5 years was 25% for a BMI of 18-25, 38% for a BMI of 25-30, 56% for a BMI of 30-35, 73% for a BMI of 35-40, and 75% for a BMI of greater than 40 (P < .001). The percentage of primary THAs revised at 15 years was 70%, 82%, 87%, 94%, and 100%, respectively (P < .001). A significant increase in early revision THA for aseptic loosening/osteolysis in obese patients (56%, 23/41) when compared with the nonobese patients (12%, 10/83, P < .001, relative risk ratio = 4.7). CONCLUSION: Preoperative BMI influences the time of failure of primary THAs referred to an academic tertiary care for revision THA as well as the mechanism of failure. Specifically, obesity increased in the relative risk of early revision THA due to aseptic loosening/osteolysis by 4.7 fold.
BACKGROUND:Obesity affects more than half a billion people worldwide, including one-third of men and women in the United States. Obesity is associated with higher postoperative complication rates after total hip arthroplasty (THA). It remains unknown whether obesepatients progress to revision THA faster than nonobese patients. METHODS: A total of 257 consecutive primary THAs referred to an academic tertiary care center for revision THA were retrospectively stratified according to preoperative body mass index (BMI), reason for revision THA, and time from primary to revision THA. RESULTS: When examining primary THAs referred for revision THA, increasing BMI adversely affected the mean time to revision THA. The percentage of primary THAs revised at 5 years was 25% for a BMI of 18-25, 38% for a BMI of 25-30, 56% for a BMI of 30-35, 73% for a BMI of 35-40, and 75% for a BMI of greater than 40 (P < .001). The percentage of primary THAs revised at 15 years was 70%, 82%, 87%, 94%, and 100%, respectively (P < .001). A significant increase in early revision THA for aseptic loosening/osteolysis in obesepatients (56%, 23/41) when compared with the nonobese patients (12%, 10/83, P < .001, relative risk ratio = 4.7). CONCLUSION: Preoperative BMI influences the time of failure of primary THAs referred to an academic tertiary care for revision THA as well as the mechanism of failure. Specifically, obesity increased in the relative risk of early revision THA due to aseptic loosening/osteolysis by 4.7 fold.
Authors: Bradley S Schoch; William R Aibinder; Jean-David Werthel; John W Sperling; Joaquin Sanchez-Sotelo; Robert H Cofield Journal: Int Orthop Date: 2017-08-07 Impact factor: 3.075
Authors: Mina Tohidi; Susan B. Brogly; Katherine Lajkosz; Mark M. Harrison; Aaron R. Campbell; Elizabeth VanDenKerkhof; Stephen M. Mann Journal: Can J Surg Date: 2019-12-01 Impact factor: 2.089