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

Soo Jae Yim; Taeg Su Ko

doi:10.5371/hp.2013.25.3.182

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

Original Article

Hip & Pelvis 2013; 25(3): 182-188.

Published online: 30 September 2013

DOI: https://doi.org/10.5371/hp.2013.25.3.182

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

Soo Jae Yim, MD, Taeg Su Ko, MD

Department of Orthopedic Surgery, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.

Address reprint request to Taeg Su Ko, MD. Department of Orthopedic Surgery, Soonchunhyang University Bucheon Hospital, 1174 Jung-dong, Wonmi-gu, Bucheon 420-767, Korea. TEL: +82-32-621-5258, FAX: +82-32-621-5018, colorko@naver.com

Received 8 July 2013 Revised 17 September 2013 Accepted 17 September 2013

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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.

Keywords: Femur head necrosis, Total hip arthroplasty, Body mass index, Quality of life, Postoperative complications

Figures and Tables

Table 1

Demographic and Clinical Characteristics of the Patients

Data are mean (standard deviation), and categorical variables as frequencies (percentages).

For continuous data, the Oneway Analysis of Variance was used, and Pearson chi-square test was employed to compare the categorical ordinal data.

BMI: body mass index, AVN: avascular necrosis, HHS: Harris hip score, SF-36: 36-item short-form health survey, PCS: physical component summary, MCS: mental component summary.

Table 2

Analysis of the Harris Hip Score, 36-item Short-form Health Survey (SF-36) Physical Component Summary and SF-36 Mental Component Summary Scores for the Four Body Mass Index Groups

Data are mean (standard deviation), and Oneway Analysis of Variance was used.

^*Statistically significant.

BMI: body mass index, HHS: Harris hip score, SF-36: 36-item short-form health survey, PCS: physical component summary, MCS: mental component summary.

Table 3

Patient-reported Complications for the Four Body Mass Index Groups

Data are mean (standard deviation), and categorical variables as frequencies (percentages).

Pearson chi-square test was employed to compare the categorical ordinal data.

^*Statistically significant.

BMI: body mass index.

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