The Effect of Body Mass Index on Clinical Result and Life Quality after Total Hip Arthroplasty of Patients Who Were Femur Head Avascular Necrosis / 대한고관절학회지

ABSTRACT

PURPOSE: This study examined the association between the pre-operative body mass index (BMI) and the post total hip replacement arthroplasty result, as well as postoperative change in the life quality of patients diagnosed with femur head avascular necrosis (AVN). MATERIALS AND METHODS: Patients diagnosed with femur head AVN undergoing total hiparthroplasty (THA) with a ceramic-ceramic articular surface from March 2005 to May 2011 were analyzed retrospectively. The Harris hip score (HHS), 36-item short-form health survey (SF-36) score, radiological examination, and complications at two years or longer after THA in the 4 groups were analyzed in terms of the BMI (underweight group, normal weight group, overweight group, and obesity group). RESULTS: The normal body weight group showed the best result(94.36+/-7.51) in all scores but the difference was not significant. In the SF-36 physical scores, obese group showed the greatest improvement. Complications occurred frequently in the underweight(50%) and obese groups(19.5%). In particular, periprosthetic fractures (P=0.002) and pneumonia (P=0.005) occurred frequently in the underweight group. CONCLUSION: The impacts of obesity and underweight on the clinical outcome after surgery are insignificant but patients with an abnormal BMI can expect a high quality of life after surgery.