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Chinese Journal of Joint Surgery(Electronic Edition) ›› 2018, Vol. 12 ›› Issue (06): 753-756. doi: 10.3877/cma.j.issn.1674-134X.2018.06.002

Special Issue:

• Clinical Research • Previous Articles     Next Articles

Weight changes after total hip arthroplasty in elderly patients with femoral neck fracture

Ning Xu1,(), Yuyan Zhang1, Yi Zhao2, Jingyou Hei1, Shiming Liu1   

  1. 1. Department of Orthopaedics, Second People’s Hospital of Liaocheng, Liaocheng 252600, China
    2. the Department of Comprehensive Surgery, Second People’s Hospital of Liaocheng, Liaocheng 252600, China
  • Received:2018-11-12 Online:2018-12-01 Published:2018-12-01
  • Contact: Ning Xu
  • About author:
    Corresponding author: Xu Ning, Email:

Abstract:

Objective

To investigate the changes of body weight after total hip arthroplasty (THA) in elderly patients with femoral neck fracture.

Methods

The patients received a unilateral primary THA with femoral neck fracture from January 2013 to June 2016 in the department of orthopaedics, the Second People’s Hospital of Liaocheng, were analyzed. Patients were divided into 3 groups according to BMI, 18.5 kg/m2≤BMI<24.0 kg/m2 for normal weight group, 24.0 kg/m2≤BMI<28.0 kg/m2 for overweight group, and BMI≥28.0 kg/m2 for obesity group. The Kaplan-Meier method was used to analyze the time interval in which the body mass index (BMI) decreased by more than 5% after THA.

Results

A total of 78 patients were enrolled in the study. There were 28 patients in the normal weight group, 46 patients in the overweight group, and 4 patients in the obese group. There was no significant difference in age and gender between the three groups (P>0.05). The median survival time to decrease the body mass index by more than 5% after THA in the three groups was 52 months(43, 69)months , 48 months(40, 67)months , 47 months(41, 60)months respectively. A log-rank test was performed (χ2 =4.72, P>0.05), indicating that the difference was not statistically significant.

Conclusion

In the normal weight group, the overweight group and the obese group, the median survival time of BMI reduction of more than 5% after THA was basically the same.

Key words: Arthroplasty, replacement, hip, Body mass index, Body weight changes, Aged

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