Sleep Profiles and Suicidal Ideation in Psychiatric Outpatients

Key Takeaways

• Among adult outpatients with sleep complaints at a psychiatric specialist hospital in China, the Mild Disturbance, Severe Insomnia, and Moderate Non-Medicated profiles had elevated adjusted odds of active suicidal ideation.
• The Moderate Non-Medicated profile had the highest suicide-related symptom rates despite milder sleep impairment.
• Suggested links between sleep profiles and death-related thoughts did not remain statistically significant after false discovery rate correction.
• Guilt had no significant adjusted association with sleep profile.

Sleep complaints among psychiatric outpatients can differ in more than their apparent severity. Whether distinct patterns of disturbed sleep relate similarly to active suicidal ideation, death-related thoughts, and guilt is a separate clinical question for each symptom. Those distinctions prompted investigators to assess sleep patterns against each symptom rather than treating suicide-related symptoms as a single outcome.

Chen and colleagues conducted a cross-sectional, person-centered analysis of 15,396 adult outpatients with sleep complaints at one psychiatric specialist hospital in China. In Chen and colleagues' BMC Psychiatry study of sleep profiles and suicide-related symptoms, they used latent profile analysis (LPA) to characterize sleep patterns from seven Pittsburgh Sleep Quality Index (PSQI) dimensions. They assessed active suicidal ideation, death-related thoughts, and guilt using three Symptom Checklist-90 (SCL-90) items. Logistic regression examined the association of sleep profile with each symptom, adjusting for age, sex, and other SCL-90 psychiatric symptom dimensions; the analyses also used false discovery rate (FDR) correction.

Adjusted odds of active suicidal ideation were elevated for the Mild Disturbance, Severe Insomnia, and Moderate Non-Medicated profiles, with a collective adjusted odds ratio (aOR) range of 1.22–1.25. The range describes the profiles together, rather than assigning an effect size to any one profile. The Moderate Non-Medicated profile also had the highest suicide-related symptom rates despite milder sleep impairment, separating symptom burden from a simple ranking of sleep severity.

For death-related thoughts, exploratory adjusted analyses suggested associations with the Medication Use but Functional and Moderate Non-Medicated profiles. Neither association remained statistically significant after FDR correction, and the overall effect of sleep profile was marginal. Guilt showed no significant association with sleep profile after adjustment.

Cross-sectional associations cannot establish whether a sleep pattern preceded a symptom or contributed to it. Patients selected for sleep complaints at one Chinese psychiatric specialist hospital also do not represent all psychiatric patients. The investigators interpreted the profile differences as potentially useful for refining risk stratification, but this remains their interpretation rather than an established clinical application.

According to the investigators, suicide-related symptoms followed profile-specific patterns rather than sleep severity alone.

Clinician Questions

Which reference sleep profile was used for adjusted active suicidal ideation odds in psychiatric outpatients?

For adult psychiatric outpatients with sleep complaints, Chen and colleagues did not identify the reference sleep profile for the adjusted active-suicidal-ideation comparisons in the available findings. A specific comparator or profile-by-profile effect size therefore cannot be supplied.

Were suicide attempts measured when sleep profiles were linked to suicide-related symptoms in psychiatric outpatients?

In psychiatric outpatients with sleep complaints, outcomes were Symptom Checklist-90 (SCL-90) symptom items assessing active suicidal ideation, death-related thoughts, and guilt, not measured suicide attempts. The associations were not shown to validate an individual suicide-risk prediction instrument.