Patient-reported outcomes at 1 and 2 years after total hip and knee arthroplasty: what is the minimum required follow-up?

• Published in: Archives of orthopaedic and trauma surgery 2022-09, Vol.142 (9), p.2121-2129
• Main Author: Piuzzi, Nicolas S.
• Format: Article
• Language: English
• Subjects: Arthritis; Hip joint; Joint replacement surgery; Knee; Medicine; Medicine & Public Health; Orthopaedic Surgery; Orthopedics; Osteoarthritis; Patients; Surgical outcomes
• ISSN: 1434-3916; 0936-8051; 1434-3916
• DOI: 10.1007/s00402-021-03819-x

Purpose The purpose of this study was to test for differences between patient-reported outcome measures (PROMs) at 1 and 2 years following total hip (THA) or knee (TKA) arthroplasty. Methods Between 2015 and 2016, n  = 469 and n  = 414 patients underwent THA and TKA, respectively. Demographic and PROMs data were collected at 1 and 2 years post-operatively. PROMs included Veterans Rand 12-item (VR-12), Hip Injury and Osteoarthritis Outcomes Score (HOOS) Pain subscore, HOOS-Physical Function Short-form (HOOS-PS), Knee Injury and Osteoarthritis Outcomes Score (KOOS) Pain subscore, and KOOS-Physical Function Short-form (KOOS-PS). Paired t tests assessed differences between groups. N  = 298 (65.8%) and n  = 240 (64%) patients followed-up at 1 year, and 205 (72% of 1-year responders) and 174 (76%) at 2 years in the THA and TKA cohorts, respectively. Results No statistically significant differences were observed between 1 and 2 years for HOOS pain ( p  = 0.445), HOOS-PS ( p  = 0.265), VR-12 PCS ( p  = 0.239), VR-12 MCS scores ( p  = 0.342) in THA and TKA cohorts [KOOS pain ( p  = 0.242), KOOS-PS ( p  = 0.088), VR-12 PCS ( p