The metabolic equivalent of task score: a useful metric for comparing high functioning hip arthroplasty patients

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Title: The metabolic equivalent of task score: a useful metric for comparing high functioning hip arthroplasty patients
Authors: Edwards, T
Guest, B
Garner, A
Logishetty, K
Liddle, A
Cobb, J
Item Type: Journal Article
Abstract: Aims: This study investigates the use of the Metabolic Equivalent of Task (MET) score in a young hip arthroplasty population and its ability to capture additional benefit beyond the ceiling effect of conventional patient reported outcomes. Patients & Method: Oxford Hip Score (OHS), EuroQol-5D index (EQ-5D), and the MET were recorded in 221 primary hip arthroplasty procedures pre-operatively and at 1-year. The distribution was examined reporting the presence of ceiling & floor effects. Validity was assessed correlating the MET with the other scores using Spearman’s rank and determining responsiveness. A subgroup of 93 patients scoring 48/48 on the OHS were analysed by age, sex, BMI and pre-operative MET using the other metrics to determine if differences could be established despite scoring identically on the OHS. Results: From our electronic database of 751 hip arthroplasty procedures, 117 primary total hip and 104 hip resurfacing arthroplasty operations were included. Mean age was 59.4 ± 11.3. Post-operatively the OHS and EQ-5D demonstrate significant negatively skewed distributions with ceiling effects of 41% and 53%, respectively. The MET was normally distributed post-operatively with no ceiling effect. Weak-moderate significant correlations were found between the MET and the other two metrics. In the 48/48 subgroup, no differences were found comparing groups with the EQ-5D, however significantly higher MET scores were demonstrated for patients aged <60 (12.7 vs 10.6, p=0.008), male patients (12.5 vs 10.8, p=0.024) and those with pre-operative MET scores >6 (12.6 vs 11.0, p=0.040). Conclusion: The MET is normally distributed in patients following hip arthroplasty, recording levels of activity which are undetectable using the OHS.
Issue Date: 23-May-2022
Date of Acceptance: 21-Feb-2022
DOI: 10.1302/2046-3758.115.BJR-2021-0445.R1
ISSN: 2046-3758
Publisher: The British Editorial Society of Bone & Joint Surgery
Start Page: 1
End Page: 10
Journal / Book Title: Bone & Joint Research
Volume: 11
Issue: 5
Copyright Statement: © 2022 Author(s) et al.This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (CC BY-NC-ND 4.0) licence, which permits the copying and redistribution of the work only, and provided the original author and source are credited. See
Keywords: 1103 Clinical Sciences
1106 Human Movement and Sports Sciences
Publication Status: Published
Online Publication Date: 2022-05-23
Appears in Collections:Department of Surgery and Cancer
Faculty of Medicine

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