Page 26 - The value of total hip and knee arthroplasties for patients

Chapter 2
ABSTRACT
Background:
The compliance rates with patient-reported outcome measures(PROMs) collected alongside arthroplasty registries vary in the literature.We aimed to describe the feasibility of a routinely collected set of PROMs alongside the Dutch Arthroplasty Register.
Methods:
The longitudinal Leiden Orthopaedics Outcomes of OsteoArthritis Study(LOAS) is a multicentre (7 Hospitals), observational study including patients undergoing total hip or total knee arthroplasty(THA or TKA). A set of PROMs: SF12, EQ5D, Hip/ Knee injury and Osteoarthritis Outcome Score (H/KOOS), Oxford Hip/Knee Score was collected preoperatively and at 6, 12, 24 months and every 2 years thereafter. Participation rates (patients taking part in the study/invited patients), and response rates (patients returning the questionnaire/eligible patients) were recorded.
Results:
Between June 2012 and December 2014, 1796 THA and 1636 TKA patients were invited, of whom 1043 THA(58%; mean age 68 years(SD10)) and 970 TKA patients(59%; mean age 71 years(SD9.5)) participated in the study. At 6 months, 35 THA and 38 TKA patients were lost to follow-up. Response rates were 90% for THA (898/1000) and 89% for TKA (827/932) participants. At 1 and 2 years, 8 and 18 THA and 17 and 11 TKA patients were lost to follow-up, respectively. The response rates among those eligible were 87% (866/992) and 84% (812/972) for THA and 84% (771/917) and 83% (756/906) for TKA patients, respectively. The 2-year questionnaire was completed by 78.5% of the initially included THA patients and by 77.9% of the initial included TKA patients.
Conclusions:
About 60% of patients undergoing THA or TKA complete PROMs preoperatively, withmorethan80%ofthemreturningfollow-upPROMs.Toincreasetheparticipation rates, more efforts concerning the initial recruitment of patients are needed.
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