disorder of the biological clock sleep disorder
Conditions
Interventions
None listed
Sponsors
Philips Research
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: DSPD patients: -diagnosed with DSPD accruing to the International Classification of Sleep Disorders, ICSD -age between 18 and 55 years -score between 6-15 on the Horne Ostberg Chronotype Questionnaire;healthy controls: -score between 16-32 on the Horne Ostberg Chronotype Questionnaire -age between 18 and 55 years -no self-reported (chronic) sleep complaints
Exclusion criteria
Exclusion criteria: • unable to speak and read Dutch. • vulnerable groups, such as people with psychotic illness, severe intellectual disability, or cognitive dysfunction. • Shift work or transmeridian flights within 1 month prior to the study • Presence of other dominant sleep disturbances as apparent from polysomnography examination
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The primary objective of the study is to investigate whether patients with DSPD suffer more from bedtime procrastination as compared to age- and sex-matched controls. A1) A comparison of DSPD-patients* average score on the Bedtime Procrastination Scale (BPS) compared to age- and sex-matched healthy controls. A2) To evaluate the correlation between DLMO (Dim Light Melatonin Onset) and the score on the BPS in DSPD patients, to explore the relation between having a late circadian rhythm and the degree of bedtime procrastination. | — |
Secondary
| Measure | Time frame |
|---|---|
| B1) To investigate whether DSPD patients show increased reward dependence as compared to controls. B2) To evaluate whether subtypes of DSPD patients can be identified with respect to reward dependence, lifestyle behaviour and occurrence of co-morbidities. B3) To provide insight into needs, wishes and pitfalls of DSPD patients with respect to chronotherapy. B4) To validate the phase estimation algorithm developed at Philips Research. | — |
Countries
Netherlands
Outcome results
None listed