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Change in mental health indicators after CBT for insomnia in the United Kingdom 2017

Average change in mental health indicators following cognitive behavioral therapy (CBT) for insomnia in the United Kingdom (UK) as of 2017*

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Release date

September 2017


United Kingdom

Survey time period

March 5, 2015 to February 17, 2016

Number of respondents

1,891 respondents

Age group

18 years and older

Special properties

University students that were insomnia sufferers as indicated by a score of 16 or lower on SCI

Supplementary notes

* Change is measured following 22 weeks of treatment, with positive percentages indicating improvement in condition and negative indicating deterioration.

The results shown here are the change between scores in each respective mental health index/scale from the start of treatment and week 22, for the group receiving CBT, represented as a percentage (percentage calculated by Statista based on the original scores).
Measurements for each mental health indicator were taken using the following methods:
Insomnia: Insomnia Severity Index.
Nightmares: Disturbing Dream and Nightmare Severity Index.
Psychosis: Prodromal Questionnaire 16-item version.
Depression: Patient Health Questionnaire 9-item version.
Anxiety: Generalized Anxiety Disorder 7-item version.
Functioning: Work and Social Adjustment Scale.
Wellbeing: Warwick–Edinburgh Mental Wellbeing Scale.
Mania: Altman Mania Scale

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