An open trial of a brief transdiagnostic internet treatment for anxiety and depression

► Anxiety and depression are often co-morbid, but there are barriers to treatment. ► Transdiagnostic internet cognitive behavioural therapy (iCBT) may increase access. ► Questions remain regarding minimum program parameters on clinical outcomes. ► This study examined a brief version of an existing transdiagnostic iCBT program. ► Outcomes were similar despite reduced length and reduced therapist contact.