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Insomnia is a condition that affects about 10% of the Western population. At present, the most common solution provided by primary care givers is pharmacological treatment. However, pharmacological treatments have a high prevalence of negative side effects. Two more recently developed treatments are chronobiological treatment (CT) and cognitive behavioral therapy (CBT). They appear safer and have more sustained effects. A problem facing implementation of CBT-I is that there are hardly any skilled therapists. Web-based CBT-I may this alleviate this problem.
A second opportunity for optimization of treatment is based on the contention that the people with insomnia most likely represent a heterogeneous mix of different subtypes, with different underlying causes and expected treatment response. This is the first step in the development of a protocol for individualized optimal treatment for specific phenotypes of insomnia, where each phenotype may show different CT and CBT-I demands.

In a systematic way the effectiveness of CT, CBT-I and their combination will be evaluated for the different phenotypes.

Insomnia patients form a heterogeneous group, each phenotypes of insomnia will show different therapeutic demands.

Baseline, 5 weeks and 10 weeks.

Web-based cognitive behavioral therapy for insomnia (CBT-I)

3 forms of chronobiological therapy (CT):

-Bright light therapy

-Thermoregulatory therapy

-Physical activity

Combinations of CBT-I and CTs.