Postoperative Sleep Disorders in Elderly THA Patients: Phenotypes, Risk Factors, and Perioperative Rehabilitation Strategies: A Single-Center Retrospective Observational Study

Purpose Sleep disorder is a frequent postoperative complication after total hip arthroplasty (THA). This study aimed to characterize sleep disorder phenotypes, identify associated risk factors, and explore the relationships between sleep disturbance patterns and clinical outcomes in elderly patients aged ≥70 years. Materials and Methods A single-center retrospective analysis included 892 primary THA patients between January 2021 and December 2024. Sleep disorders were assessed via a validated 12-item questionnaire and diagnosed according to the International Classification of Sleep Disorders, 2nd Edition. Visual analog scale (VAS) pain scores and length of hospital stay (LOS) were extracted and stratified by different groups. All patients finished a minimum 6-month postoperative follow-up. Results 78.3% of patients had postoperative sleep disturbances (median 6 weeks, range 4-8 weeks). Primary insomnias (72.1%) dominated, with adjustment sleep disorder (41.5%) most common; secondary insomnias (27.9%) linked to comorbidities (19.7%) and drugs (8.2%). Elderly patients had 83.5% incidence and 3.2-fold higher risk of persistent disturbances versus non-elderly patients ( p