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> 近期已有一项针对14个国家招募的多中心样本的研究对分裂型人格特质（schizotypal personality traits）进行了测评，但该研究未纳入斯堪的纳维亚队列。为此，本研究旨在对伴有或不伴有精神障碍的瑞典语使用人群的分裂型人格特质进行测评，并探究简易分裂型人格问卷（Schizotypal Personality Questionnaire-Brief, SPQ-B）瑞典语版本的心理测量学特征。<b>方法：</b> 本研究将50名精神科患者的SPQ-B测评结果与202名对照者（<i>n</i> = 202）进行对比。另有25名对照者完成了全版分裂型人格问卷（SPQ）两次测评，据此计算了SPQ及SPQ-B的重测信度。本研究使用Omega系数估算了SPQ-B及其维度的内部一致性，并将患者组与对照组的SPQ-B得分（均值<i>M</i>与标准差<i>SD</i>）与全球范围内的同类研究结果进行了对比。<b>结果：</b> 本研究发现，本研究的SPQ-B得分与其他已发表研究的样本得分具有相似性。SPQ-B展现出良好的内部一致性与可接受的重测相关系数。结果表明，该问卷的瑞典语版本具有良好的效度，能够有效区分精神疾病队列与非精神疾病对照人群。<b>结论：</b> 简易分裂型人格问卷（SPQ-B）的瑞典语版本具备优良的心理测量学特征，可用于临床与非临床人群的分裂型特质评估。