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The Generic BFRB Scale-8 (GBS-8): a transdiagnostic scale to measure the severity of body-focused repetitive behaviours
Behavioural and Cognitive Psychotherapy ( IF 2.467 ) Pub Date : 2022-08-04 , DOI: 10.1017/s1352465822000327
Steffen Moritz 1 , Christina Gallinat 2 , Sarah Weidinger 1 , Alina Bruhns 1 , Despina Lion 1 , Ivar Snorrason 3 , Nancy Keuthen 3 , Stella Schmotz 1 , Danielle Penney 4
Affiliation  

Background:

Body-focused repetitive behaviours (BFRBs) such as skin picking and hair pulling are frequent but under-diagnosed and under-treated psychological conditions. As of now, most studies use symptom-specific BFRB scales. However, a transdiagnostic scale is needed in view of the high co-morbidity of different BFRBs.

Aims:

We aimed to assess the reliability as well as concurrent and divergent validity of a newly developed transdiagnostic BFRB scale.

Method:

For the first time, we administered the 8-item Generic BFRB Scale (GBS-8) as well as the Repetitive Body Focused Behavior Scale (RBFBS), modified for adults, in 279 individuals with BFRBs. The GBS-8 builds upon the Skin Picking Scale-Revised (SPS-R), but has been adapted to capture different BFRBs concurrently. A total of 170 participants (61%) were re-assessed after 6 weeks to determine the test–retest reliability of the scale.

Results:

Similar to the SPS-R, factor analysis yielded two dimensions termed symptom severity and impairment. The test–retest reliability of the scale was satisfactory (r = .72, p<.001). Concurrent validity (r = .74) with the RBFBS was good (correlational indexes for concurrent validity were significantly higher than that for discriminant validity).

Discussion:

The GBS-8 appears to be a reliable and valid global measure of BFRBs. We recommend usage of the scale in combination with specific BFRB scales to facilitate comparability across studies on obsessive-compulsive spectrum disorders.



中文翻译:

通用 BFRB Scale-8 (GBS-8):一种跨诊断量表,用于测量以身体为中心的重复行为的严重程度

背景:

以身体为中心的重复行为 (BFRBs),如扒皮和拔毛,是常见但未得到充分诊断和治疗的心理状况。截至目前,大多数研究使用症状特异性 BFRB 量表。然而,鉴于不同 BFRB 的高合并症,需要一个跨诊断量表。

目标:

我们旨在评估新开发的跨诊断 BFRB 量表的可靠性以及同时和不同的有效性。

方法:

我们首次对 279 名 BFRB 患者进行了 8 项通用 BFRB 量表 (GBS-8) 以及针对成人修改的重复身体集中行为量表 (RBFBS)。GBS-8 建立在皮肤采摘量表修订版 (SPS-R) 的基础上,但已适应同时捕获不同的 BFRB。6 周后对总共 170 名参与者 (61%) 进行了重新评估,以确定量表的重测信度。

结果:

与 SPS-R 类似,因子分析产生两个维度,称为症状严重程度和损伤。该量表的重测信度令人满意(r = .72,p <.001)。RBFBS 的同时效度 ( r = .74) 良好(同时效度的相关指标显着高于区分效度)。

讨论:

GBS-8 似乎是一种可靠且有效的全球 BFRB 测量方法。我们建议将该量表与特定的 BFRB 量表结合使用,以促进强迫症谱系障碍研究之间的可比性。

更新日期:2022-08-04
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