Ambulatory assessment of affective instability in borderline personality disorder - The effect of the sampling frequency
Ambulatory assessment of affective instability in borderline personality disorder - The effect of the sampling frequency
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DOI：
10.1027/1015-5759.23.4.238
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发表时间：
2007-01-01
影响因子：
2.5
通讯作者：
Sawitzki, Guenther
中科院分区：
文献类型：
--
作者：
Ebner-Priemer, Ulrich W.;Sawitzki, Guenther
情感不稳定是边缘型人格障碍（BPD）的一个重要标准，但使用日记的研究得出了相互矛盾的结果。差异的发现可能是由于基于时间的设计的差异造成的，特别是自我报告之间的时间间隔长度不同。尽管人们一致认为基于时间的设计应该适合感兴趣过程的时间动态，但不存在通用约定。我们使用 24 小时动态监测来重复评估 50 名 BPD 患者和 50 名健康对照者的主观痛苦评级。我们调查了所选择的基于时间的设计（自我报告之间的时间间隔为 15 分钟）是否（1）揭示了 BPD 患者的受试者变异性以及（2）挖掘了感兴趣的过程。使用图形和统计评估，我们证明基于时间的设计（15 分钟/24 小时）确实捕获了 BPD 患者的个体差异。原始数据与随机分布数据（模拟）的比较和自相关分析证明，我们挖掘了特定的过程，而不是随机选择遇险状态。使用自我报告之间不断增加的滞后表明，短间隔，尤其是（15 分钟、30 分钟）可以挖掘特定过程。我们建议使用短时间间隔来研究情感不稳定的时间动态。
Affective instability is an essential criterion for borderline personality disorder (BPD) but studies using diaries have rendered conflicting results. Discrepant findings may be caused by differences in the time-based design, especially in the diverse length of the time intervals between self-reports. Even though there is consensus that the time-based design should fit the temporal dynamics of the processes of interest, no general conventions exist. We used 24 h ambulatory monitoring to repeatedly assess subjective ratings of distress in 50 BPD-patients and in 50 healthy controls. We investigated if the chosen time-based design with a time interval of 15 min between self-reports (1) reveals within subject variability in BPD-patients and (2) taps the process of interest. Using graphical and statistical evaluation, we demonstrate that the time-based design (15 min/24 h) does catch within-person variability in the BPD-patients. Comparison of the original data with randomly distributed data (simulation) and autocorrelation analyses prove that we tapped a specific process and did not randomly pick states of distress. Using increasing lags between self-reports reveals that short intervals, especially, (15 min, 30 min) tap a specific process. We recommend using short time intervals to study temporal dynamics of affective instability.