McLean Hospital/Harvard Medical School, Belmont, MA, USA.
Department of Psychiatry, University of Minnesota, Minneapolis, MN, USA.
Psychiatry Res. 2018 Feb;260:207-218. doi: 10.1016/j.psychres.2017.11.034. Epub 2017 Nov 16.
This study was an initial investigation of sensory-over responsivity (SOR) to external sensations among individuals with trichotillomania (TTM).
Adults endorsing DSM-5 TTM criteria (N = 609) and a non-affected comparison sample (N = 268) completed a self-report survey.
The majority of the TTM group endorsed SOR symptoms; three-quarters endorsed at least mild tactile and auditory SOR. About 15% endorsed SOR symptoms in the severe to extreme range. TTM participants had significantly higher mean scores in both auditory (t (652.89) = -6.51, p < .001, d = .45) and tactile (t (655.24) = -8.38, p < .001, d = .58) modalities than comparison participants, with medium effect sizes. Greater levels of SOR were related to greater levels of perfectionism and by-proxy pulling urges. SOR was significantly and positively correlated with functional impairment when controlling for TTM severity.
This study expands prior work in obsessive-compulsive related disorders by contributing the first data about associations between TTM and over-responsivity to external sensations. Findings collectively suggest SOR may be related to maladaptive emotion regulation processes in TTM. A novel measure of SOR was developed and administered in this study.
本研究初步调查了拔毛癖（TTM）患者对外界感觉的敏感过度反应（SOR）。
符合 DSM-5 TTM 标准的成年人（N=609）和未受影响的对照组（N=268）完成了一份自我报告调查。
大多数 TTM 组都有 SOR 症状；四分之三的人至少有轻度触觉和听觉 SOR。约 15%的人有严重到极度的 SOR 症状。与对照组相比，TTM 参与者在听觉（t（652.89）=-6.51，p<.001，d=0.45）和触觉（t（655.24）=-8.38，p<.001，d=0.58）方面的平均得分显著更高，具有中等效应大小。更高水平的 SOR 与更高水平的完美主义和间接的拉扯冲动有关。在控制 TTM 严重程度的情况下，SOR 与功能障碍显著正相关。
本研究通过提供关于 TTM 与对外界感觉过度敏感之间关联的第一个数据，扩展了强迫症相关障碍的先前工作。研究结果表明，SOR 可能与 TTM 中的适应不良情绪调节过程有关。本研究开发并使用了一种新的 SOR 测量方法。
