Earlier activity patterns are linked to antidepressant response to sleep loss and light therapy in bipolar depression

Two-thirds of patients with Type I Bipolar Disorder experienced a 50% reduction in depression scores after one week of total sleep deprivation combined with light therapy.

• Responders demonstrated an increase in daytime activity levels.
• An average phase advance of the activity-rest rhythm of 57 minutes was observed in responders compared to pre-treatment.
• Nighttime sleep was reduced in patients who responded to the treatment.
• Non-responders did not exhibit significant changes in their activity-rest rhythm parameters.
• The phase advance of the activity-rest rhythm may correlate with the antidepressant response to total sleep deprivation and light therapy.

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