Table 1 Overview of online cognitive behavioral therapy for insomnia (eCBT-I)

Week 1:

­ Face to face session to provide information about the eHealth treatment and to optimize motivation for treatment

­ Start of online session 1: psychoeducation on sleep, the different sleep stages, and sleep disorders following acquired brain injury and their consequences in daily life. Homework assignment: map personal sleep problems and their consequences for daily life together with coping so far: what was helpful and what was not?

­ Start with a daily sleep diary, which will be continued throughout the treatment.

Week 2:

­ Online session 2: setting personal goals for treatment, information about sleep hygiene. Homework assignment: write down sub goals to improve sleep hygiene for the following week.

Week 3:

­ Second face- to- face session to evaluate the personal goals for treatment

­ Online session 3: information on the relation between stress and sleep and different relaxation techniques. Homework assignment: practice of these relaxation techniques the following week.

Week 4:

­ Online session 4: information on the circadian clock which is entrained by light and temperature and the influence of activation on daytime sleepiness. Homework assignment: to balance activities and relaxation or to be more active during daytime.

Week 5:

­ Online session 5: different cognitive techniques, such as mindfulness and cognitive restructuring. Homework assignment: address and change unhelpful cognitive beliefs.

Week 6:

­ Online session 6: consolidation and relapse prevention.