Latent Profiles of Early Personal Mastery and Their Association with Out-of-Hospital Rehabilitation Exercise Adherence One Month After Hip Arthroplasty: A Single-Centre Prospective Observational Study

Purpose

In this single-centre prospective observational study, we aimed to identify latent profiles of early personal mastery in patients after hip arthroplasty, examine factors associated with profile membership, and explore differences in out-of-hospital rehabilitation exercise adherence across profiles. Patients and methods: A total of 350 patients who underwent primary hip arthroplasty at a tertiary hospital in Urumqi, Xinjiang, from August to December 2024, were recruited by convenience sampling; 17 were lost to follow-up, and 333 completed the 1-month assessment and were included in the analysis. Personal mastery was assessed on postoperative day 1-2 with the Personal Mastery Scale, together with a general information questionnaire; adherence to out-of-hospital rehabilitation exercise was assessed at 1 month postoperatively with the Functional Exercise Adherence Scale for Orthopedic Patients. Latent profile analysis (LPA) was used to identify profiles of personal mastery, and multinomial logistic regression to examine factors associated with profile membership. Differences in adherence across profiles were analysed using the Bolck-Croon-Hagenaars (BCH) approach to account for classification uncertainty, and were additionally examined in linear models adjusted for demographic and clinical covariates.