a Department of Occupational Therapy , Kibi International University , Takahashi , Japan.
Int J Psychiatry Clin Pract. 2018 Nov;22(4):289-295. doi: 10.1080/13651501.2018.1426772. Epub 2018 Jan 17.
Although the self-report version of Liebowitz Social Anxiety Scale (LSAS) is frequently used to measure social anxiety, data is lacking on the smallest detectable change (SDC), an important index of measurement error. We therefore aimed to determine the SDC of LSAS. Japanese adults aged 20-69 years were invited from a panel managed by a nationwide internet research agency. We then conducted a test-retest internet survey with a two-week interval to estimate the SDC at the individual (SDC) and group (SDC) levels. The analysis included 1300 participants. The SDC and SDC for the total fear subscale (scoring range: 0-72) were 23.52 points (32.7%) and 0.65 points (0.9%), respectively. The SDC and SDC for the total avoidance subscale (scoring range: 0-72) were 32.43 points (45.0%) and 0.90 points (1.2%), respectively. The SDC and SDC for the overall total score (scoring range: 0-144) were 45.90 points (31.9%) and 1.27 points (0.9%), respectively. Measurement error is large and indicate the potential for major problems when attempting to use the LSAS to detect changes at the individual level. These results should be considered when using the LSAS as measures of treatment change.
虽然自评版 Liebowitz 社交焦虑量表（LSAS）常用于测量社交焦虑，但缺乏最小可检测变化（SDC）的数据，而 SDC 是测量误差的一个重要指标。因此，我们旨在确定 LSAS 的 SDC。
我们从一家全国性互联网研究机构管理的小组中邀请了 20-69 岁的日本成年人。然后，我们进行了一项为期两周的间隔的测试-重测互联网调查，以估计个体（SDC）和群体（SDC）水平的 SDC。
该分析包括 1300 名参与者。总恐惧子量表（评分范围：0-72）的 SDC 和 SDC 分别为 23.52 分（32.7%）和 0.65 分（0.9%）。总回避子量表（评分范围：0-72）的 SDC 和 SDC 分别为 32.43 分（45.0%）和 0.90 分（1.2%）。总总分（评分范围：0-144）的 SDC 和 SDC 分别为 45.90 分（31.9%）和 1.27 分（0.9%）。
测量误差较大，表明试图使用 LSAS 检测个体水平的变化时存在重大问题的可能性。在使用 LSAS 作为治疗变化的衡量标准时，应考虑这些结果。
