Blacker L, Gupta M, Quinn R, Monzani B, Jassi A, Veale D, Mataix-Cols D, Krebs G
Research Department of Clinical, Educational & Health Psychology, University College London, 1-19 Torrington Place, WC1E 7HB, London, UK.
Department of Psychology, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK.
Child Psychiatry Hum Dev. 2024 Oct 15. doi: 10.1007/s10578-024-01768-1.
Body dysmorphic disorder (BDD) typically develops during adolescence, but there has been little research evaluating assessment tools for BDD in youth. This study sought to provide a comprehensive psychometric evaluation of a brief self-report questionnaire of BDD symptoms, the Body Image Questionnaire Child and Adolescent version (BIQ-C), in both clinical and non-clinical adolescent samples. Properties of the BIQ-C were examined in 479 adolescents recruited through schools and 118 young people with BDD attending a specialist clinic. Sensitivity to change was additionally examined in a subgroup of the clinical sample who received treatment (n = 35). Exploratory factor analysis indicated that a two-factor structure provided the best fit for the data in the non-clinical sample. The two-factor solution was corroborated through confirmatory factor analysis as the best solution in the clinical sample, although it did not fulfil predefined fit thresholds The first factor encompassed preoccupation and repetitive behaviours, while the second included items assessing functional impairment. The BIQ-C showed good internal consistency across both samples, and convergent validity with other measures of BDD. Among those in the clinical sample who received treatment, BIQ-C scores decreased significantly, and BIQ-C change scores were highly correlated with change scores on the gold-standard clinician-rated measure of BDD symptom severity. These findings indicate that the BIQ-C is a suitable tool for assessing BDD symptoms in young people and measuring change during treatment.
躯体变形障碍（BDD）通常在青春期发病，但针对青少年BDD评估工具的研究较少。本研究旨在对一份简短的BDD症状自评问卷——《儿童青少年身体意象问卷》（BIQ-C）在临床和非临床青少年样本中进行全面的心理测量学评估。通过学校招募了479名青少年，并选取了118名在专科诊所就诊的BDD青少年，对BIQ-C的特性进行了研究。另外，对接受治疗的临床样本亚组（n = 35）的变化敏感性进行了检验。探索性因素分析表明，两因素结构最适合非临床样本中的数据。验证性因素分析证实，两因素解决方案是临床样本中的最佳解决方案，尽管它未达到预定义的拟合阈值。第一个因素包括先占观念和重复行为，第二个因素包括评估功能损害的项目。BIQ-C在两个样本中均显示出良好的内部一致性，并且与BDD的其他测量方法具有收敛效度。在接受治疗的临床样本中，BIQ-C得分显著下降，并且BIQ-C变化得分与BDD症状严重程度的金标准临床医生评定测量的变化得分高度相关。这些发现表明，BIQ-C是评估青少年BDD症状和测量治疗期间变化的合适工具。
