Delayed sleep phase in severe obsessive-compulsive disorder: a systematic case-report survey

Area of Science:

• Psychiatry
• Sleep Medicine
• Clinical Psychology

Background:

• Investigate the prevalence of delayed sleep phase (DSP) in severe obsessive-compulsive disorder (OCD) inpatients.
• Identify clinical and demographic factors associated with DSP in this population.

Observation:

• A retrospective study analyzed 187 inpatient case reports (1995-2003).
• Sleep and clinical data were systematically extracted from medical and nursing records.

Findings:

• 17.6% of severe OCD inpatients met criteria for DSP.
• DSP was associated with unemployment, younger age, and earlier age of OCD onset.
• No significant difference in depression severity was found between DSP and non-DSP groups.

Implications:

• DSP is a notable comorbidity in severe OCD, potentially independent of depression.
• Understanding DSP's role in OCD may reveal novel therapeutic targets.
• Further research using objective measures like actigraphy is recommended for OCD sleep studies.