The Impact of Obesity on Short Stem Total Hip Arthroplasty

Completed

• Conditions: THA; Obesity
• Interventions: Procedure: Total hip arthroplasty

• Registration Number: NCT06430723
• Lead Sponsor: Krankenhaus Barmherzige Schwestern Linz

Brief Summary

The purpose of this study is to review the impact of obesity on subsidence and clinical outcome after short stem total hip arthroplasty.

Detailed Description

Short stem total hip arthroplasty (THA) has gained popularity due to its bone-sparing technique, but its outcomes in obese patients remain uncertain.

While studies on the mid-term outcome in a general patient cohort provide excellent results in terms of the clinical and radiological outcome as well as the complication rate of short stem THA, data on its use in obese patients is still rare and not sufficiently conclusive. Some studies have found no evidence of increased subsidence in obese patients, while other studies have shown contrary trends.

In this context, the aim of this study was to investigate the relationship between BMI, postoperative subsidence and clinical outcomes in the setting of short stem THA.

Study Timeline

• Study Start: 2018-01-01
• Primary Completion: 2023-12-31
• Study Completion: 2024-01-31
• Study First Submitted: 2024-05-21
• Study First Submitted QC: 2024-05-21
• Study First Posted: 2024-05-28
• Status Verified: 2024-06
• Last Update Submitted: 2024-06-10
• Last Update Posted: 2024-06-11

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 200

Inclusion Criteria

1. patients who underwent primary short stem hip arthroplasty with Mathys Optimys short stem between 01.01.2018 and 31.12.2020
2. availability of preoperative and postoperative radiographs for assessment of subsidence
3. a minimum BMI of 30kg/m2 for the obese group
4. a minimum follow-up of 24 months.

Exclusion Criteria

1. former surgeries of the hip in question
2. incomplete clinical data
3. incomplete radiological data

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Non-obese	Total hip arthroplasty	Body mass index \< 30 kg/m2
Obese	Total hip arthroplasty	Body mass index \>= 30 kg/m2

Primary Outcome Measures

Name	Time	Method
Harris Hip Score	2 years	Clinical outcome, \[0-100points\]
Subsidence	2 years	subsidence of the short stem measured via EBRA (Einzelbild Röntgenanalyse), \[mm\]

Secondary Outcome Measures

Name	Time	Method
surgery time	2 years	Surgery time from cut to skin closure, \[minutes\]
Length of stay	2 years	Length of postoperative stay in hospital \[days\]
Blood loss	2 years	Blood loss calculated according to laboratory test results of hematocrit \[ml\]

Trial Locations

Locations (1)

Ordensklinikum Linz, Barmherzige Schwestern Abteilung Orthopädie; 🇦🇹 Linz, Austria