2023 ISAKOS Biennial Congress ePoster
Developing a New Calculator To Assess The Risk For Conversion To Hip Arthroplasty In Subjects Undergoing Arthroscopy For Femoroacetabular Impingement: The Har-Index
Roberto Seijas-Vazquez, MD, PhD, Prof., Barcelona SPAIN
Ramon Cugat Bertomeu, MD, PhD, Barcelona, Barcelona SPAIN
David Barastegui, MD, PhD, MSc, L'hospitalet De Llobregat, BARCELONA SPAIN
Patricia Laiz Boada, BSc, Barcelona SPAIN
Alfred Ferré-Aniorte, PT, Barcelona SPAIN
Xavier Cuscó, MD, Barcelona SPAIN
Eduard Alentorn-Geli, MD, PhD, MSc, FEBOT, FACGME, Barcelona SPAIN
Luis Garcia Bordes, Barcelona SPAIN
Instituto Cugat, Barcelona, Barcelona, SPAIN
FDA Status Not Applicable
Summary
An easy tool is presented that will help practitioners to make more informed decisions regarding the performance or not of hip arthroscopy in patients with a high risk for conversion to THA
ePosters will be available shortly before Congress
Abstract
Hip arthroscopy in femoroacetabular impingement (FAI) cases is a growing technique that can carry some unsatisfactory results. The most important one is the early need for a total hip arthroplasty (THA). The objective of this study is to describe a new useful tool to assess the preoperative risk for THA conversion after hip arthroscopy in patients with FAI.
This study is a retrospective analysis of a prospective cohort. Preoperative variables of 584 FAI-patients from a single center who underwent hip arthroscopy with a minimum 2-years follow-up were analyzed. The risk of each variable for THA was calculated and, by selecting the variables with an area under the ROC curve greater than 0.7, a calculator was constructed providing a risk index for each patient.
Four variables (age, Body Mass Index, Tönnis and ALAD) were related to an increased risk of conversion. The optimal cut-off points for each one was calculated, and a risk index was generated. The Hip-Arthroplasty-Risk Index (HAR-Index), is a 0-4 points scale obtained from four binary scores (0-1) depending on whether the cut-off point of each variable is reached or not. The increased risk of THA for each of the HAR-Index values was 1,1%, 6,2%, 17,9%, 55,1% and 79,3% respectively. The HAR-Index showed an area under the ROC curve of 0.89, a predictive index categorized as very good.
This easy tool will help practitioners to make more informed decisions regarding the performance or not of hip arthroscopy in patients with a high risk for conversion to THA.