Contralateral Hip Abductor Muscle Strength Associated with Comfort of Getting into and Out of the Car after Total Hip Arthroplasty

Tetsunari Harada; Satoshi Hamai; Daisuke Hara; Tsutomu Fujita; Daisuke Fujiyoshi; Shinya Kawahara; Ryosuke Yamaguchi; Kenichi Kawaguchi; Yasuharu Nakashima

doi:10.20944/preprints202307.0892.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Version 1 : Received: 12 July 2023 / Approved: 13 July 2023 / Online: 13 July 2023 (07:04:48 CEST)

There are no studies that have investigated the characteristics of car use across THA patients, including those who do not drive. This study aimed to evaluate, in THA patients, (1) postoperative car usage, (2) comfort while entering and exiting a car, and (3) whether lower limb muscle strength affects action comfort. One hundred seventy-two post-THA patients completed the questionnaire in 2020, along with assessments of hip abductor and knee extensor muscle strength before surgery and at discharge. Patients whose overall comfort level was judged as “comfortable” were defined as the “comfort” group; others were placed in the “discomfort” group. Of the 172 patients, 161 reported car usage at a mean of 5.6 years after THA. Of these, 114 and 47 patients were placed in the "comfort" and "discomfort" groups, respectively. Patients in the "discomfort" group were three times more likely to experience discomfort using the contralateral side door than the surgical side door, and about twice as many patients experienced discomfort when entering as when exiting. Lower preoperative contralateral hip abductor muscle strength was the only independent predictor for discomfort. The take-home messages were that prevention of contralateral-side weakness may improve comfort during the action after THA.

total hip arthroplasty; car; muscle strength; rehabilitation

Medicine and Pharmacology, Orthopedics and Sports Medicine

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Contralateral Hip Abductor Muscle Strength Associated with Comfort of Getting into and Out of the Car after Total Hip Arthroplasty

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