Preoperative timed single leg standing time is associated with the postoperative activity of daily living in aged disabled patients with end-stage knee osteoarthritis at six-months after undergoing total knee arthroplasty.
OBJECTIVE
The aim of the present study was to investigate the effect size (ES) of total knee arthroplasty (TKA) for the symptoms and lower limb function and identify preoperative factor(s) associated with the post-operative activity of daily living (ADL) in aged patients with end-stage knee OA undergoing TKA.


METHODS
Fifty-nine aged patients with end-stage knee OA (mean age: 74.6 years) were enrolled in this study. The symptoms and lower limb function of the patients were evaluated using the Japanese Knee Osteoarthritis Measure (JKOM), the timed up and go (TUG) test and timed single-legged stance test with eyes open (TSLS) before and after six months from the operation.


RESULTS
While the ES of TKA for the improvement of pain was 2.83, the ES of TKA for the improvement of ADL, TUG and TSLS were 1.30, 0.59, and 0.49, respectively. While the post-operative ADL score was not associated with the preoperative ADL or pain scores, it was associated with the preoperative TUG and TSLS scores. A multiple regression analysis revealed that the one preoperative factor associated with the postoperative ADL was the TSLS.


CONCLUSIONS
The preoperative TSLS is associated with the postoperative ADL in aged disabled patients with end-stage knee OA.
a Department of Orthopedics , Juntendo Tokyo Koto Geriatric Medical Center , Tokyo , Japan.|b Department of Medicine for Orthopaedics and Motor Organ , Juntendo University Graduate School of Medicine , Tokyo , Japan , and.
Yu
Y
Sugawara
b Department of Medicine for Orthopaedics and Motor Organ , Juntendo University Graduate School of Medicine , Tokyo , Japan , and.|c Sportology Center, Juntendo University Graduate School of Medicine , Tokyo , Japan.
Muneaki
M
Ishijima
a Department of Orthopedics , Juntendo Tokyo Koto Geriatric Medical Center , Tokyo , Japan.|b Department of Medicine for Orthopaedics and Motor Organ , Juntendo University Graduate School of Medicine , Tokyo , Japan , and.
Hisashi
H
Kurosawa
a Department of Orthopedics , Juntendo Tokyo Koto Geriatric Medical Center , Tokyo , Japan.|b Department of Medicine for Orthopaedics and Motor Organ , Juntendo University Graduate School of Medicine , Tokyo , Japan , and.
Yukio
Y
Shimura
b Department of Medicine for Orthopaedics and Motor Organ , Juntendo University Graduate School of Medicine , Tokyo , Japan , and.
Haruka
H
Kaneko
b Department of Medicine for Orthopaedics and Motor Organ , Juntendo University Graduate School of Medicine , Tokyo , Japan , and.|c Sportology Center, Juntendo University Graduate School of Medicine , Tokyo , Japan.
Lizu
L
Liu
b Department of Medicine for Orthopaedics and Motor Organ , Juntendo University Graduate School of Medicine , Tokyo , Japan , and.
Ippei
I
Futami
a Department of Orthopedics , Juntendo Tokyo Koto Geriatric Medical Center , Tokyo , Japan.|b Department of Medicine for Orthopaedics and Motor Organ , Juntendo University Graduate School of Medicine , Tokyo , Japan , and.
Yoshiyuki
Y
Iwase
b Department of Medicine for Orthopaedics and Motor Organ , Juntendo University Graduate School of Medicine , Tokyo , Japan , and.|c Sportology Center, Juntendo University Graduate School of Medicine , Tokyo , Japan.
Kazuo
K
Kaneko
D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D020370:Osteoarthritis, Knee / Q000473:pathology / Q000534:rehabilitation / Q000601:surgery*; D010146:Pain / Q000209:etiology; D011183:Postoperative Complications; D011184:Postoperative Period; D011187:Posture; D057234:Preoperative Period
Activity of daily living; Effect size; Osteoarthritis; Total knee arthroplasty