9. Comparison 1. Cognitive behavioural therapy (CBT) + treatment‐as‐usual (TAU) versus TAU: costs of services received.

Study	Outcome	Experimental group: CBT + TAU (n = 25)	Control group: TAU (n = 27)	Statistic
Davidson 2009	Total cost of health, social work and criminal justice services received; over 12 months	GBP 38,004	GBP 31,097	No statistic available
Davidson 2009	Average cost per participant for NHS services alone; over 12 months	GBP 1295	GBP 1133	No statistic available
CBT: cognitive behavioural therapy; GBP: British pound sterling; n: number of participants; TAU: treatment as usual.