Table 2.

Summary of the Transdiagnostic Intervention for Sleep and Circadian Dysfunction

Cross-cutting modules introduced in sessions 1-3 (and featured in all sessions thereafter)	Module Topics in TranS-C	Treatment module
Case formulation	Establishing regular sleep-wake times	Core module 1, part a
Education	Learning a wind-down routine	Core module 1, part b
Behavior change and motivation	Learning a wake-up routine	Core module 1, part c
Goal-setting	Improving daytime functioning	Core module 2
	Correcting unhelpful sleep-related beliefs	Core module 3
	Improving sleep efficiency	Optional module 1
	Reducing time in bed	Optional module 2
	Dealing with delayed or advanced phase	Optional module 3
	Reducing sleep-related worry/vigilance	Optional module 4
	Promoting compliance with CPAP/exposure therapy for claustrophobic reactions to CPAP	Optional module 5
	Negotiating sleep in a complicated environment	Optional module 6
	Reducing nightmares	Optional module 7
	Maintenance of behavior change	Core module 4

Abbreviations: CPAP Continuous positive airway pressure, SMI Severe mental illness, TranS-C Transdiagnostic Intervention for Sleep and Circadian Dysfunction