Division of Balance Disorders, Department of Otorhinolaryngology and Head and Neck Surgery, Maastricht University Medical Center, Maastricht, Netherlands.
Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University Medical Center, Maastricht, Netherlands.
J Neurol. 2020 Dec;267(Suppl 1):15-23. doi: 10.1007/s00415-020-10043-x. Epub 2020 Jul 11.
The DizzyQuest, an app-based vestibular diary, provides the opportunity to capture the number and nature of vertigo attacks in daily life. To accomplish this, the DizzyQuest provides different strategies: event sampling using an attack questionnaire, and time sampling using an evening questionnaire. Objective of this study was to investigate whether the number and nature of reported vertigo attacks was comparable between the two questionnaires.
Fifty-seven patients, who reported vertigo attacks, used the DizzyQuest for on average 24 days. The number and nature (including symptoms, triggers and duration) of vertigo attacks were compared between the attack and the evening questionnaire.
The attack questionnaire was used 192 times. In contrast, at least 749 new vertigo attacks were reported in 446 evening questionnaires. A vertigo attack was not always reported in both questionnaires during the same day. Vertigo attacks that were most likely captured by both questionnaires were not always reported the same in both questionnaires regarding triggers and duration.
Event sampling using an attack questionnaire has low recall bias and, therefore, reliably captures the nature of the attack, but induces a risk of under-sampling. Time sampling using an evening questionnaire suffers from recall bias, but seems more likely to capture less discrete vertigo attacks and it facilitates registration of the absence of vertigo attacks. Depending on the clinical or research question, the right strategy should be applied and participants should be clearly instructed about the definition of a vertigo attack.
DizzyQuest 是一款基于应用程序的前庭日记，可提供在日常生活中捕捉眩晕发作次数和性质的机会。为此，DizzyQuest 提供了两种策略：使用眩晕问卷进行事件抽样，以及使用晚间问卷进行时间抽样。本研究的目的是调查两种问卷报告的眩晕发作次数和性质是否具有可比性。
57 名报告有眩晕发作的患者平均使用 DizzyQuest 24 天。比较了攻击问卷和晚间问卷中报告的眩晕发作次数和性质（包括症状、诱因和持续时间）。
攻击问卷共使用 192 次。相比之下，在 446 份晚间问卷中至少报告了 749 次新的眩晕发作。在同一天，并非总是在两份问卷中都报告了眩晕发作。两份问卷都报告的眩晕发作，在诱因和持续时间方面并非总是报告一致。
使用攻击问卷进行事件抽样具有较低的回忆偏倚，因此可靠地捕捉到了发作的性质，但存在抽样不足的风险。使用晚间问卷进行时间抽样存在回忆偏倚，但更有可能捕捉到不太离散的眩晕发作，并便于记录眩晕发作的缺失。根据临床或研究问题，应应用正确的策略，并应明确告知参与者眩晕发作的定义。
