People with Parkinson’s disease (PD) experience greater difficulties during dual task (DT) walking compared to healthy controls, but factors explaining the variance in DT costs remain largely unknown. Additionally, as cognitive impairments are common in PD it is important to understand whether cognitive status influences the strategies used during DT paradigms. The study aimed to (1) explore DT costs on gait and cognition during DT walking, (2) investigate factors associated with DT costs, and (3) to investigate to what extent patterns of DT costs and prioritization differed according to cognitive status. A total of 93 people with Parkinson’s disease were examined when walking in single and DT conditions. Information regarding demographics, PD severity, mobility, and cognitive and affective symptoms was collected, and an extensive neuropsychological test battery was used to classify whether participants had mild cognitive impairment (PD MCI) or not (PD non-MCI). Dual task costs were observed across all gait domains except asymmetry. Cognitive status was associated with DT costs on both gait and cognition. Nonmotor experiences of daily living were further associated with DT cost on cognition, and TUG-cog associated with DT cost on gait. People with PD MCI had larger DT costs on gait than PD non-MCI. Strategies differed according to cognitive status, whereby PD MCI used a posture-second strategy, and PD non-MCI used a posture-first strategy. Once verified in future studies, these results can inform clinicians and researchers when tailoring DT training paradigms to the specific characteristics of people with PD.

与健康对照组相比，帕金森病 (PD) 患者在双任务 (DT) 行走过程中遇到更大的困难，但解释 DT 成本差异的因素在很大程度上仍然未知。此外，由于认知障碍在 PD 中很常见，因此了解认知状态是否影响 DT 范式中使用的策略很重要。该研究旨在 (1) 探索 DT 步行期间步态和认知的 DT 成本，(2) 调查与 DT 成本相关的因素，以及 (3) 调查 DT 成本和优先级的模式在多大程度上根据认知状态不同。共有 93 名帕金森病患者在单人和双人行走条件下接受了检查。收集了有关人口统计学、PD 严重程度、活动性以及认知和情感症状的信息，并且使用广泛的神经心理学测试电池对参与者是否患有轻度认知障碍 (PD MCI) 进行分类（PD 非 MCI）。除了不对称之外，在所有步态域中都观察到了双重任务成本。认知状态与步态和认知的 DT 成本相关。日常生活的非运动体验与认知的 DT 成本进一步相关，而 TUG-cog 与步态的 DT 成本相关。PD MCI 患者的步态 DT 成本高于 PD 非 MCI 患者。策略因认知状态而异，其中 PD MCI 使用姿势第二策略，而 PD 非 MCI 使用姿势优先策略。一旦在未来的研究中得到验证，这些结果可以为临床医生和研究人员在根据 PD 患者的特定特征定制 DT 培训范式时提供信息。