Pearce, AmyJoshi, ChaitanyaChan, GeorginaLamberton, TonyMacLean, SimonVane, AndrewHébert-Losier, Kim2026-04-222026-04-222026Pearce, A., Joshi, C., Chan, G., Lamberton, T., MacLean, S., Vane, A., & Hébert-Losier, K. (2026). 15-year patient-reported outcomes of a cemented flanged cup and stem combination in primary total hip arthroplasty: A New Zealand study. HIP International, 36(1), 34-44. https://doi.org/10.1177/112070002513711321120-7000https://hdl.handle.net/10289/18226Methods: We investigated 15-year patient-reported outcomes (PROMs) and their predictors in primary total hip arthroplasty (THA) for osteoarthritis using a cemented flanged cup and stem from a regional joint registry in New Zealand. Regional data were collected for all primary THAs with this cemented combination from 1 January 2003 to 30 June 2023 who had recorded PROMs on at least 1 occasion (n = 263). PROMs included Oxford Hip Score, Western Ontario and McMaster Universities Arthritis Index and Veterans Rand-12, evaluated against patient age, ethnicity, sex, body mass index (BMI), funding pathway, and American Society of Anesthesiologists (ASA) rating. Results: Significant improvements across preoperative PROMs were noted 1-year post-surgery, with a mean change above 23 in the Oxford Hip Score maintained at 5, 10, and 15 years (p ⩽ 0.001). Conclusions: Regression analysis indicated that being female, public funding, and higher BMI were associated with worse preoperative PROMs. Poorer preoperative scores, older age and ASA 3 rating correlated with poorer postoperative outcomes.enLicence for published version: Creative Commons Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/preoperativepreoperativepreoperativepreoperativepreoperativeJournal Article10.1177/112070002513711321724-606732 Biomedical and Clinical Sciences3202 Clinical Sciences3202 Clinical sciences4003 Biomedical engineering