The transdiagnostic intervention for sleep and circadian dysfunction (TranS-C) in community mental health centers: Do provider-initiated ad hoc adaptations influence implementation and patient outcomes?

= 396). Assessments were conducted at provider posttraining, patient pretreatment, and provider and patient posttreatment. Outcomes were provider ratings of treatment fit and patient utilization, sleep, and psychiatric symptoms. Condition (adapted vs. standard TranS-C) was not associated with ratings of fit or ad hoc adaptations. In both conditions, fit was strong, and providers reported approaching a moderate extent of ad hoc adaptations, which were not associated with changes in provider ratings of fit or patient outcomes. Modular and transdiagnostic treatment can be perceived as fitting well within CMHCs by providers. Importantly, ad hoc adaptations did not negatively impact outcomes. (PsycInfo Database Record (c) 2026 APA, all rights reserved).