Shift work disorder Mental and Behavioural Disorders
Conditions
Interventions
Based on progress achieved so far, the current proposal focuses on further exploring the psychosocial determinants of shift work disorder (SWD) with 120 participants (Phase 1) and testing (Phase 2) wi
(b) shift workers with continuous schedule good sleepers
(c) shift workers with a fragmented schedule with SWD
and (d) shift workers with fragmented schedule good sleepers.
Participants who express interest following the publicity of the study are contacted by telephone for a 15-minute telephone interview to
Sponsors
Bureau de gestion des projets de recherche / Convenance institutionnelle CIUSSS de la Capitale-Nationale
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Over 18 years old 2. Working during night shift at least five nights out of 14 days for at least three months in Quebec hospitals and their research centres, health and social services centres, long-term care residential centres, and residences for the elderly 3. Night work between 24:00 and 8:00 (± 1 hour)
Exclusion criteria
Exclusion criteria: Phase 1: 1. Presenting a possible sleep disorder other than shift work disorder (SWD) 2. Present symptoms of SDW without meeting all the diagnostic criteria for this disorder (e.g., taking sleeping pills on a regular basis for sleep without having symptoms of insomnia) 3. Presenting with major depression with suicidal ideation 4. Presenting with a psychotic disorder or any disorders resulting from substance abuse 5. Being unable to answer questions during interviews or being unable to respond to questionnaires 6. Being visually impaired Phase 2: Two exclusion criteria are added: 7. Having consumed hypnotics on a regular basis in the last month (> 3 times per week) 8. Consuming more than 10 cups of coffee (or other stimulants) per day
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| 1. The following sleep variables are calculated for each sleep period (main, 24-hour, naps and night): total wakefulness time (total waking time from bedtime to bedtime), sleep latency, total sleep time (TST; bedtime to bedtime sleep time) and sleep efficiency (ratio of TST to total bedtime) with the actigraph (Respironic). The actigraph is worn like a watch and records the movement continuously using a microprocessor. Actigraph is worn for 2 weeks at baseline, in the waiting condition 2 weeks before receiving treatment, during the whole treatment (8 to 10 weeks), 2 weeks after treatment and 2 weeks, 6 months follow-up after the treatment. 2. The following sleep variables are calculated for each sleep period (main, 24-hour, naps and night): total wakefulness time (total waking time from bedtime to bedtime), sleep latency, total sleep time (TST; bedtime to bedtime sleep time) and sleep efficiency (ratio of TST to total bedtime) with an online sleep diary. The sleepiness questions contained in the sleep diary are taken from the Stanford Sleepiness Scale. When the participant wakes up, he or she answers online questions about his or her sleep. Sleep diary is completed during 2 weeks at baseline, in the waiting condition 2 weeks before receiving treatment, during the whole treatment (8 to 10 weeks length), 2 weeks after treatment and during 2 weeks, 6 months follow-up after treatment. 3. Sleep quality, latency, duration and effectiveness as well as diurnal consequences are measured with Pittsburgh Sleep Quality Index (IQSP). IQSP is completed online at baseline, in the waiting condition 2 weeks before receiving treatment, 2 weeks after treatment and 6 months follow-up after treatment. 4. The degree of sleepiness is assessed by the Epworth's Sleepiness Scale completed online at baseline, in the waiting condition 2 weeks before receiving treatment, 2 weeks after treatment and 6 months follow-up after treatment. 5. The severity of insomnia is assessed by Insomnia Severity | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Participant's eligibility is assessed with a 15 minutes’ telephone questionnaire at baseline. 2. Work schedule and the reasons for working at night are measured with a questionnaire called Your Work Schedule at baseline 3. Presence of current or past psychological disorders are assessed with the MINI (Mini International Neuropsychiatric Interview), a semi-structured interview conducted at baseline 4. Presence of sleep disorders, their history, sleep patterns, precipitating and maintenance factors, temporal relationship between the onset of night work and sleep difficulties, information on the schedule and number of working hours are assessed with an adaptation of the Structured Insomnia Interview, a semi-structured interview conducted at baseline and 2 weeks after treatment 5. Vital functions and physiological parameters are measured at baseline and after the treatment as follows: participants are weighed and measured to derive the Body Mass Index. Blood pressure and heart rate are recorded while sitting, standing and lying down with a Life Style digital device. 6. Physiological activation is measured with three different questionnaires at baseline, in the waiting condition 2 weeks before treatment, 2 weeks after treatment and 6 months after treatment: 6.1. The medical history questionnaire (completed at baseline only) targets medical conditions, current and past medication use, physical activity level, meal times, cigarette and alcohol consumption 6.2. The Chronotype questionnaire measures whether a person is the morning type (best vigilance in the morning) versus the evening type (best vigilance in the evening) 6.3. The Activation Predisposition Scale measures the intensity of somatic and cognitive activation symptoms. 7. Cognitive activation is measured with three different questionnaires at baseline, in the waiting condition 2 weeks before treatment, 2 weeks after treatment and 6 months after treatment. The Dysfunctional beliefs and attitudes about sleep | — |
Countries
Canada
Outcome results
None listed