Condition category
Mental and Behavioural Disorders
Date applied
Date assigned
Last edited
Prospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Not provided at time of registration

Trial website

Contact information



Primary contact

Miss Ellis Magnee


Contact details

Wanssumseweg 12
5807 EA
+31 478 527815

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Sleep in substance use disordered patients in addiction care


Study hypothesis

Sleep will improve by a cognitive behavioural therapeutic intervention in patients admitted to an addiction care clinic that show problems in initiating and maintaining sleep in the subacute detoxification phase.

Ethics approval

To be submitted in July 2008 (as of 21/05/2008)

Study design

Randomised, open clinical trial, in two addiction care centres.

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details below to request a patient information sheet


Insomnia in patients with substance use disorder


The study is a randomised controlled trial in a cohort of patients referred to addiction care (2 addiction clinics). The duration of the study for the participating patients is 15 weeks, plus a follow up at 2 months after completion of the intervention. In order to gather a large study population, the research takes 1.5 years.

Initially, 600 eligible patients will be enrolled in the study and will undergo various baseline assessments (T0; see primary and secondary outcome measures) and start standard treatment for their sleep problems. During the 4th week in treatment (T1), those who still continue with the treatment will be asked to undergo additional assessments (see primary and secondary outcome measures). In the 5th week of treatment, the patients who show problems in initiating or maintaining sleep at T1 are selected for the next stage of the study. The selected patients (90 patients) are randomly assigned to one of the two treatment groups.

The participants allocated to the intervention group receive sleep training, consisting of sleep hygiene, sleep education and cognitive behavioural therapy. Cognitive behavioural therapy will be given in 6 sessions of 2 hours, as developed by I. Verbeek (1999;

The control group receives standard care (and no sleep training). This means a daily programme of cognitive therapy, group meetings, creative therapy, movement therapy, coffee breaks etc., the regular treatment for a normal addiction clinic.

The total duration of follow-up per individual is 2 months. On completion of this follow-up assessment, the participants in the control group will also receive the interventions if they wish.

Intervention type



Not Specified

Drug names

Primary outcome measures

1. Subjective sleep efficiency as measured by a sleep log. The sleep log will be recorded by the participants during the 6-week treatment period. The sleep log has several outcome measures: time in bed (TIB), total sleep time (TST), sleep onset latency (SOL), sleep efficiency (SE), wake after sleep onset (WASO) and number of awakenings (AWAK).
2. Sleep quality measured by the Pittsburgh Sleep Quality Index (PSQI) at timepoints T0, T1, T2, T3 and T4

T0 = Day of clinical intake
T1 = 4th week of treatment
T2 = 6th week of treatment, before randomisation
T3 = At the end of sleep training
T4 = 2 months after the sleep training

Secondary outcome measures

Vigilance during the day as measured by the Sustained Attention to Response Task (SART) at T1, T2, T3 and T4. SART will be carried out once a week during the period between T2 and T3.

Tertiary outcome measures:
1. Severity of dependency on drugs/ alcohol measured by the Composite International Diagnostic Interview - Substance Abuse Module (CIDI-SAM) at T0 and T4
2. Addiction measured using the addiction scales of the Addiction Severity Index (ASI) at T0 and T4
3. Presence of any psychiatric disorder assessed by the Mini International Neuropsychiatric Interview (MINI)
4. Presence of sleep disorders assessed by the SLEEP-50 at T0, T1, T2, T3 and T4
5. Symptom assessment by the Symptom Check List (SCL-90) at T0, T1, T2, T3 and T4
6. Quality of life assessed by the EQ-5D at T0, T1, T2, T3 and T4
7. Actigraphy at T1, T2, T3 and T4. The actigraph registers movements of the right arm in right handed subjects for 48 hours or more.
8. Go/No-Go response-inhibition task (T1)

T0 = Day of clinical intake
T1 = 4th week of treatment
T2 = 6th week of treatment, before randomisation
T3 = At the end of sleep training
T4 = 2 months after the sleep training

Overall trial start date


Overall trial end date


Reason abandoned


Participant inclusion criteria

1. Both males and females, age limit: 65
2. Patients who are admitted for at least 5 weeks to an addiction clinic
3. Those who are "clean" i.e. addicted patients that do not use drugs/alcohol anymore
4. Score of 5 or higher in the Pittsburgh Sleep Quality Index (PSQI)

Participant type


Age group




Target number of participants


Participant exclusion criteria

1. Patients with sleep problems other than problems of initiating or maintaining sleep
2. Diagnosis of severe depression, attention deficit hyperactivity disorder (ADHD)
3. Patients who have a primary benzodiazepine addiction

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

Wanssumseweg 12
5807 EA

Sponsor information


Mental Health Group in North and Middle Limburg (GGZ Noord- en Midden-Limburg) (Netherlands)

Sponsor details

Stationsweg 46
5803 AC

Sponsor type

Hospital/treatment centre



Funder type

Hospital/treatment centre

Funder name

Mental Health Group in North and Middle Limburg (GGZ Noord- en Midden-Limburg) (Netherlands)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Results - basic reporting

Publication summary

Publication citations

Additional files

Editorial Notes