ISRCTN13697710.

Study name	A study of trauma‐focused online guided self help versus trauma‐focused cognitive behavioural therapy for post‐traumatic stress disorder.
Methods	Phase III pragmatic, assessor‐blind, individually randomised, controlled, non‐inferiority trial
Participants	Adults with PTSD following a single traumatic event
Interventions	Experimental arm Online guided self‐help based on TFCBT for 8 weeks Comparator arm Face‐to‐face individual TFCBT for up to 12 weeks
Outcomes	Time point for assessment: 16 weeks, 52 weeks Primary outcomes: CAPS‐5 Secondary outcomes: IES‐R, EQ‐5D‐5L, WSAS, PHQ‐9, GAD‐7, AUDIT, MSPSS, ISI, GSES, PTCI
Starting date	October 2016
Contact information	Ms Katy Addison rapid@cardiff.ac.uk
Notes	www.isrctn.com/ISRCTN13697710