Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA.
Compr Psychiatry. 2010 Mar-Apr;51(2):183-6. doi: 10.1016/j.comppsych.2009.04.003.
Despite increasing recognition of the potentially severe medical and psychosocial costs of pathologic skin picking (PSP), no large-sample, randomized investigation of its prevalence in a national population has been conducted.
Two thousand five hundred and thirteen US adults were interviewed during the spring and summer of 2004 in a random-sample, national household computer-assisted phone survey of PSP phenomenology and associated functional impairment. Respondents were classified for subsequent analysis according to proposed diagnostic criteria.
Of all respondents, 16.6% endorsed lifetime PSP with noticeable skin damage; 60.3% of these denied picking secondary to an inflammation or itch from a medical condition. One fifth to one quarter of those with lifetime PSP not related to a medical condition endorsed tension or nervousness before picking, tension or nervousness when attempting to resist picking, and pleasure or relief during or after picking. A total of 1.4% of our entire sample satisfied our criteria of picking with noticeable skin damage not attributable to another condition and with associated distress or psychosocial impairment. Pickers satisfying these latter criteria differed from other respondents in demographics (age, marital status) and both picking phenomenology and frequency.
尽管病理性皮肤搔抓（PSP）可能带来严重的医学和心理社会成本已得到越来越多的认识，但尚未对其在全国人群中的患病率进行大规模、随机调查。
2004 年春季和夏季，通过全国范围内的家庭计算机辅助电话调查，对 2513 名美国成年人进行了 PSP 现象学及其相关功能障碍的随机抽样调查。根据提出的诊断标准，对受访者进行了分类分析。
所有受访者中，16.6%的人有过明显皮肤损伤的 PSP 病史；其中 60.3%的人否认是因医学状况引起的炎症或瘙痒而搔抓。五分之一到四分之一的与医学状况无关的 PSP 病史患者，在搔抓前感到紧张或焦虑，在试图抵制搔抓时感到紧张或焦虑，在搔抓过程中或搔抓后感到愉悦或放松。我们的整个样本中，有 1.4%的人符合我们的标准，即有明显的皮肤损伤，不能归因于其他疾病，且伴有明显的痛苦或心理社会障碍。满足这些后一标准的搔抓者在人口统计学特征（年龄、婚姻状况）以及搔抓现象和频率方面与其他受访者存在差异。
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