Chronic Insomnia Clinical Trial
Official title:
Cognitive Behavioral Therapy for Insomnia Among Different Types of Shift Workers
The aim of the study is to compare the implementation and effectiveness of group and self-help based cognitive behavioral treatment for insomnia (CBT-I) delivered by occupational health services (OHS) in a randomized and controlled design (RCT) among different types of shift workers.
Because of irregular sleep-wake pattern shift work is a challenge in the screening and
treatment of chronic insomnia. Earlier results has showed that CBT-I delivered by trained
nurses of OHS may be effective treatment also among workers with irregular work hours. The
aim of the present study is to compare the implementation and effectiveness of OHS delivered
group and self-help based CBT-I in a RCT design among different types of shift work.
Participants (n=90-120) are shift workers with insomnia disorder that has lasted at least
three months. The participants are randomized to a) group-based CBT-I (6 group sessions); or
b) mainly computerized self-help CBT-I (an individual session before and after the
intervention) delivered by a trained OHS nurse or psychologist; or c) control group given a
sleep hygiene intervention (1 individual session). Outcomes are assessed using a sleep diary,
questionnaires, actigraphy and cognitive performance tests. To study the effect of CBT-I
program at molecular level, blood samples of participants will be collected at baseline and
at the end of the program for genetic analyses. The measurements are conducted at five time
points for a period of two years.
The investigators expect to find that both group and self-help based CBT-I among different
types of shift workers are effective low-intensity treatments of chronic insomnia compared to
control intervention.
Through the training of OHS or general medical practitioners and by computerised self-help
interventions the investigators may have better chance to make CBT-I more accessible to a
larger number of insomniacs also with different types of working hours. Additionally, it may
be possible to decrease chronic insomnia and unfavourably consequences of insomnia to the
health and performance capacity in shift workers.
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