Comparison of outcomes after total hip arthroplasty between patients with osteonecrosis of the femoral head in Association Research Circulation Osseous stage III and stage IV: a five-year follow-up study.

"Declarations Ethics approval and consent to participateThis study was approved by the ethics committee of the Third Hospital of Hebei Medical University. All procedures were performed according to the principles of the Declaration of Helsinki and in accordance with the guidelines of Strengthening the Reporting of Surgical Cohort Studies (STROCSS). Patients involved in this study were informed and consented. All data were anonymized by removing sensitive personal information to protect privacy. Consent for publicationNot applicable. Competing interestsThe authors declare no conflict of interest. Competing interests The authors declare no conflict of interest."

"Funding This research did not receive any specific Grant from funding agencies in the public, commercial, or not-for-profit sectors."