Li Chenfei, Du Litao, Xue Xiangli, Zhao Na, He Qiang, Chen Si, Zhang Xianliang
School of Physical Education, Shandong University, 17922 Jingshi Road, Lixia District, Jinan City, Shandong Province 250061, China.
College of Sports and Health, Shandong Sport University, 10600 Century Avenue, Licheng District, Jinan City, Shandong Province, China.
Exp Gerontol. 2025 Mar;201:112706. doi: 10.1016/j.exger.2025.112706. Epub 2025 Feb 10.
This study aims to investigate the associations of objectively measured daily steps and step intensity with peripheral arterial disease (PAD) in Chinese community-dwelling older women.
Cross-sectional data were derived from the baseline survey of the Physical Activity and Health in Older Women Study. Peripheral arterial disease was evaluated through ankle-brachial index (ABI), ABI ≤ 0.9 was defined as cut-off point. Daily steps and step intensity were measured via tri-axial accelerometers. Multivariate logistic regression was used to investigate associations of step variable with PAD. Receiver operating characteristic (ROC) analysis was applied to identify an optimal cut-off value for step variables to screen PAD.
After adjusting for confounding factors, it was found that daily steps was not independently associated with PAD, and brisk steps, peak 30 as well as peak 60, were significantly associated with PAD, with ORs of 0.68 (0.50-0.93), 0.71 (0.52-0.96) and 0.60 (0.40-0.90), respectively. The optimal cut-off values for brisk steps, peak 30 and 60 screening PAD were 952.3 steps, 76.7 steps/min and 51.8 steps/min, respectively.
Step intensity rather than daily steps was independently associated with PAD in Chinese community-dwelling older women. Increasing the intensity during walking may be a viable strategy to reduce the risk of PAD in self-care and cardiovascular nursing.
本研究旨在调查中国社区老年女性中客观测量的每日步数和步幅强度与外周动脉疾病（PAD）之间的关联。
横断面数据来自老年女性身体活动与健康研究的基线调查。通过踝臂指数（ABI）评估外周动脉疾病，将ABI≤0.9定义为临界值。通过三轴加速度计测量每日步数和步幅强度。采用多因素逻辑回归分析步幅变量与PAD之间的关联。应用受试者工作特征（ROC）分析确定步幅变量筛查PAD的最佳临界值。
在调整混杂因素后，发现每日步数与PAD无独立关联，而轻快步数、30秒峰值步幅以及60秒峰值步幅与PAD显著相关，其比值比分别为0.68（0.50 - 0.93）、0.71（0.52 - 0.96）和0.60（0.40 - 0.90）。轻快步数、30秒峰值步幅和60秒峰值步幅筛查PAD的最佳临界值分别为952.3步、76.7步/分钟和51.8步/分钟。
在中国社区老年女性中，步幅强度而非每日步数与PAD独立相关。在自我护理和心血管护理中，增加步行强度可能是降低PAD风险的可行策略。
