Schizotypal traits in Swedish speaking psychiatric patients and non-psychiatric controls

<b>Introduction:</b> Recently, schizotypal personality traits were measured in a multinational sample recruited from 14 countries, however no Scandinavian cohort was included. The aim of this study was, therefore, to measure schizotypal personality traits in Swedish-speaking populations, with and without psychiatric disorders, and to investigate the psychometric properties of the Swedish version of the Schizotypal Personality Questionnaire-Brief (SPQ-B). <b>Methods:</b> The SPQ-B results from 50 psychiatric patients were compared to controls (<i>n</i> = 202). An additional sample of 25 controls completed the full SPQ twice and we calculated test-retest reliability for SPQ and SPQ-B. We estimated the internal consistency for SPQ-B and SPQ-B factors with omega. We compared the results of SPQ-B (<i>M</i> and <i>SD</i>) in patient and control groups to corresponding results worldwide. <b>Results:</b> We found similarity between our SPQ-B scores and those from other published samples. SPQ-B showed good internal consistency and acceptable test-retest correlations. The results indicate that the Swedish version of the instrument is valid and can differentiate psychiatric cohorts from non-psychiatric controls. <b>Conclusion:</b> The Swedish version of the SPQ-B exhibit good psychometric properties and is useful for assessing schizotypal traits in clinical and non-clinical populations.

<b>引言：</b>既往已有研究针对14个国家招募的跨国样本评估了分裂型人格特质（schizotypal personality traits），但该研究未纳入斯堪的纳维亚队列。为此，本研究旨在评估伴或不伴精神障碍的瑞典语人群的分裂型人格特质，并检验简版分裂型人格问卷（Schizotypal Personality Questionnaire-Brief，SPQ-B）瑞典语版的心理测量学特性。
<b>方法：</b>本研究将50名精神科患者的SPQ-B得分与<i>n</i> = 202名对照者进行比较。额外纳入25名对照者完成完整版SPQ两次施测，以此计算SPQ及SPQ-B的重测信度（test-retest reliability）；采用欧米茄（Omega）系数估算SPQ-B及其各维度的内部一致性（internal consistency）；将患者组与对照组的SPQ-B得分（<i>M</i>和<i>SD</i>）与全球已发表的同类研究结果进行对比。
<b>结果：</b>本研究的SPQ-B得分与其他已发表队列的结果具有一致性；SPQ-B具备良好的内部一致性及可接受的重测相关系数。结果表明，该问卷瑞典语版具有良好的效度，可有效区分精神科队列与非精神科对照人群。
<b>结论：</b>SPQ-B瑞典语版具备优良的心理测量学特性，可用于临床及非临床人群的分裂型人格特质评估。