UK poSt Arthroplasty Follow-up rEcommendations (UK SAFE): what does analysis of linked, routinely collected national data sets tell us about mid-late term revision risk after hip replacement? Retrospective cohort study. Issue 3 (9th March 2022)

• Record Type: Journal Article
• Authors: Smith, Lindsay K; Garriga, Cesar; Kingsbury, Sarah R; Pinedo-Villanueva, Rafael; Delmestri, Antonella; Arden, Nigel K; Stone, Martin; Conaghan, Philip G; Judge, Andrew
• Is Part Of: BMJ open. Volume 12:Issue 3(2022)
• Publication Date: 2022-03-09
• Subjects: hip replacement -- mid-late revision -- follow-up -- cox regression -- risk; Medicine -- Research -- Periodicals; 610.72
• DOI: 10.1136/bmjopen-2021-050877
• Languages: English
• ISSNs: 2044-6055

Abstract

Abstract : Objective: To identify patients at risk of mid-late term revision of hip replacement to inform targeted follow-up. Design: Analysis of linked national data sets from primary and secondary care (Clinical Practice Research Datalink (CPRD-GOLD); National Joint Registry (NJR); English Hospital Episode Statistics (HES); Patient-Reported Outcome Measures (PROMs)). Participants: Primary elective total hip replacement (THR) aged≥18. Event of interest: Revision surgery≥5 years (mid-late term) after primary THR. Statistical methods: Cox regression modelling to ascertain risk factors of mid-late term revision. HR and 95% CI assessed association of sociodemographic factors, comorbidities, medication, surgical variables and PROMs with mid-late term revision. Results: NJR-HES-PROMs data were available from 2008 to 2011 on 142 275 THR; mean age 70.0 years and 61.9% female. CPRD GOLD-HES data covered 1995–2011 on 17 047 THR; mean age 68.4 years, 61.8% female. Patients had minimum 5 years postprimary surgery to end 2016. In NJR-HES-PROMS data, there were 3582 (2.5%) revisions, median time-to-revision after primary surgery 1.9 years (range 0.01–8.7), with 598 (0.4%) mid-late term revisions; in CPRD GOLD, 982 (5.8%) revisions, median time-to-revision 5.3 years (range 0–20), with 520 (3.1%) mid-late term revisions. Reduced risk of mid-late term revision was associated with older age at primary surgery (HR: 0.96; 95% CI: 0.95 to 0.96); better 6-month postoperative pain/function scores (HR: 0.35; 95% CI: 0.27 to 0.46); use of ceramic-on-ceramic (HR: 0.73; 95% CI: 0.56 to 0.95) or ceramic-on-polyethylene (HR: 0.76; 95% CI: 0.58 to 1.00) bearing surfaces. Increased risk of mid-late term revision was associated with the use of antidepressants (HR: 1.32; 95% CI: 1.09 to 1.59), glucocorticoid injections (HR: 1.33; 95% CI: 1.06 to 1.67) and femoral head size≥44 mm (HR: 2.56; 95% CI: 1.09 to 6.02) No association of gender, obesity or Index of Multiple Deprivation was observed. Conclusion: The risk of mid-late term THR is associated with age at primary surgery, 6-month postoperative pain and function and implant factors. Further work is needed to explore the associations with prescription medications observed in our data.