Kuratsubo Ryota, Watanabe Hiroyuki, Nagao Masashi, Kamide Naoto, Kaji Kazuki, Toda Naruaki, Mizuno Kosuke, Kaneko Hironori, Takazawa Yuji
Department of Rehabilitation, Kitasato Institute Hospital, Kitasato University, Minato-ku, Tokyo, Japan.
Department of Sports Medicine and Sportology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan.
Geriatr Orthop Surg Rehabil. 2025 Jul 18;16:21514593251360812. doi: 10.1177/21514593251360812. eCollection 2025.
Life-space mobility is defined as the spatial area traversed by an individual in daily life, extending from bedroom to locations beyond the individual's hometown, considering distance, frequency, and required assistance. The Life-Space Assessment (LSA) is used to evaluate life-space mobility. It has been reported that the LSA score after total hip arthroplasty (THA) shows an improvement relative to the preoperative score in patients with hip osteoarthritis. Symptoms and walking function also improve after THA. However, the association between these improvements and an increase in the LSA score after THA remains unclear. The purpose of this study was to identify the factors associated with an increase in the LSA score after THA in females with hip osteoarthritis.
This retrospective cohort study involved females planning to undergo primary and unilateral THA for hip osteoarthritis. The LSA score, subjective hip symptoms and function (assessed using the modified Harris hip score), and walking speed were assessed preoperatively and at 6 months postoperatively. Factors associated with the postoperative change in the LSA score were investigated using multiple regression analysis.
A total of 120 participants were included. Improvement in walking speed (β = 0.19, = 0.011) was significantly associated with the postoperative increase in the LSA score. The preoperative LSA score (β = -0.67, < 0.001), age (β = -0.17, = 0.011), and contralateral hip osteoarthritis (β = -0.15, = 0.017) were also associated with the change in the LSA score.
The recovery of maximal walking speed, preoperative life-space mobility, age, and contralateral hip osteoarthritis influenced postoperative expansion of life-space mobility. Improved walking speed may serve as a key factor contributing to the expansion of life-space mobility following THA.
生活空间移动性被定义为个体在日常生活中所经过的空间范围，从卧室延伸至个体家乡以外的地点，涵盖距离、频率和所需协助等方面。生活空间评估（LSA）用于评估生活空间移动性。据报道，全髋关节置换术（THA）后，髋骨关节炎患者的LSA评分相对于术前评分有所改善。THA后症状和步行功能也有所改善。然而，这些改善与THA后LSA评分增加之间的关联仍不明确。本研究的目的是确定髋骨关节炎女性患者THA后LSA评分增加的相关因素。
这项回顾性队列研究纳入了计划接受原发性单侧THA治疗髋骨关节炎的女性患者。术前及术后6个月评估LSA评分、主观髋关节症状和功能（采用改良Harris髋关节评分进行评估）以及步行速度。使用多元回归分析研究与LSA评分术后变化相关的因素。
共纳入120名参与者。步行速度的改善（β = 0.19，P = 0.011）与术后LSA评分增加显著相关。术前LSA评分（β = -0.67，P < 0.001）、年龄（β = -0.17，P = 0.011）和对侧髋骨关节炎（β = -0.15，P = 0.017）也与LSA评分变化相关。
最大步行速度的恢复、术前生活空间移动性、年龄和对侧髋骨关节炎影响THA术后生活空间移动性的扩展。步行速度的改善可能是THA后生活空间移动性扩展的关键因素。
