Co-morbid mental health diagnoses present challenges for services structured to provide disorder-specific models of treatment, such as NHS Talking Therapies services. Intolerance of uncertainty (IU) has been identified as both disorder specific and transdiagnostic, although little research explores transdiagnostic approaches to treatment of IU alone. A transdiagnostic cognitive behavioural therapy treatment targeting IU, the ‘Making Friends with Uncertainty’ (MFWU) group, was developed and piloted in a Talking Therapies primary care service in an earlier evaluation (Mofrad et al., 2020). The aim of this study was to replicate and further evaluate the intervention. Twenty people presenting with a range of anxiety disorders started the intervention in two groups. The study used a single group, within-subjects quasi-experimental design, collecting data at eight points for routine outcome measures of anxiety, depression and functioning, and five points for measures of anxiety disorder-specific symptoms and IU. Intention-to-treat analyses showed improvement on a general measure of anxiety as well as improvement on the measure of IU. Significantly there was improvement on the disorder specific measures even though the intervention was aimed at the underlying process of IU, rather than the particular symptoms targeted by these measures. The MFWU group may be an efficient and effective way to deliver a highly specified transdiagnostic intervention for intolerance of uncertainty when people are treated in a mixed group format.
Key learning aims(1) To consider the effectiveness of a transdiagnostic group targeting IU.
(2) To develop understanding of a group intervention for building tolerance to uncertainty.
(3) To consider the impact of targeting IU on specific anxiety disorders.
(4) To offer a methodological framework for effectively evaluating a group intervention in routine practice.