Nikbakht Negar, Rezaee Mehdi, Kalantari Minoo, Tabatabaee Seyed Mehdi, Shahidi Gholam Ali
Department of Occupational Therapy, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Department of Basic Sciences, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Basic Clin Neurosci. 2022 Sep-Oct;13(5):685-694. doi: 10.32598/bcn.2021.2410.1. Epub 2022 Sep 1.
Appropriate information about the ability of patients with Parkinson disease (PD) to perform cognitive instrumental activities of daily living (IADL) is necessary. The present study aimed to assess the psychometric properties of the Persian version of the Penn Parkinson daily activities questionnaire-15 (PDAQ-15).
A total of 165 knowledgeable informants of PD patients completed the PDAQ-15. The clinical dementia rating scale, Hoehn and Yahr staging, hospital anxiety and depression scale (HADS), and Lawton IADL scale were used in the study. Internal consistency and test-retest reliability were evaluated by the Cronbach α coefficient and intraclass correlation coefficient (ICC), respectively. To examine the dimensionality of the questionnaire, exploratory factor analysis was used. The construct validity was assessed using the Spearman rank correlation test. To assess the discriminative validity, PDAQ-15 scores were compared across cognitive stages.
The PDAQ-15 showed strong internal consistency (the Cronbach α=0.99) and test-retest reliability (ICC= 0.99). Only one dimension was identified for the PDAQ-15 in the factor analysis. There was a strong correlation between PDAQ-15 with the depression domain of the HADS scale and the Lawton IADL scale (rs=|0.71-0.95|). The correlation of PDAQ-15 with the anxiety domain of the HADS scale was moderate (rs=0.66). Discriminative validity analysis showed that the PDAQ-15 has significant power to discriminate between PD patients across cognitive stages.
These results suggest that the PDAQ-15 is a valid and reliable PD-specific instrument and can be useful in clinical and research settings.
了解帕金森病（PD）患者进行认知性日常生活工具性活动（IADL）的能力的相关信息很有必要。本研究旨在评估波斯语版宾夕法尼亚帕金森病日常活动问卷15（PDAQ - 15）的心理测量特性。
共有165名了解帕金森病患者情况的信息提供者完成了PDAQ - 15。本研究使用了临床痴呆评定量表、霍恩和亚尔分级、医院焦虑抑郁量表（HADS）以及劳顿IADL量表。分别通过克朗巴赫α系数和组内相关系数（ICC）评估内部一致性和重测信度。为检验问卷的维度，采用探索性因素分析。使用斯皮尔曼等级相关检验评估结构效度。为评估区分效度，比较了不同认知阶段的PDAQ - 15得分。
PDAQ - 15显示出很强的内部一致性（克朗巴赫α = 0.99）和重测信度（ICC = 0.99）。在因素分析中，PDAQ - 15仅识别出一个维度。PDAQ - 15与HADS量表的抑郁领域以及劳顿IADL量表之间存在很强的相关性（rs = |0.71 - 0.95|）。PDAQ - 15与HADS量表的焦虑领域的相关性为中等（rs = 0.66）。区分效度分析表明，PDAQ - 15具有显著的能力来区分不同认知阶段的帕金森病患者。
这些结果表明，PDAQ - 15是一种有效且可靠的帕金森病专用工具，可用于临床和研究环境。
