Conducting Sleep Studies in Night Shift Workers

Pre-Test Documentation and Preparation

The American Academy of Sleep Medicine recommends using wrist actigraphy for 7-14 days before the PSG/MSLT to objectively document the patient's habitual sleep-wake timing and ensure adequate sleep time leading up to testing 1, 2
Actigraphy provides more accurate sleep data than self-reported sleep logs, which tend to overestimate sleep time by approximately 1.5 hours per night, according to the American College of Chest Physicians 3, 4
A concurrent sleep diary should be used alongside actigraphy to document unusual activities, device removal, and to help differentiate motionless awake periods from true sleep, as suggested by the American College of Chest Physicians 4, 5
Actigraphy with light sensors can verify sleep timing and help define the major sleep period, particularly useful for shift workers, as recommended by the American College of Chest Physicians 4, 5

The American Academy of Sleep Medicine recommends scheduling the PSG and MSLT during the patient's habitual sleep period rather than at conventional daytime hours 1, 2

Ensure the patient has had adequate sleep time (verified by actigraphy) before the MSLT to differentiate between sleepiness due to sleep deprivation versus organic disorders like narcolepsy, according to the American Academy of Sleep Medicine and the American College of Chest Physicians 1, 3
Be aware that shift work that disrupts circadian rhythms may independently cause excessive sleepiness and should be considered in the differential diagnosis, as noted by the Environmental Health Perspectives 6, 7

Failing to document adequate sleep time before MSLT may lead to false positive results due to sleep deprivation, as warned by the American Academy of Sleep Medicine 1, 2
Patients may underreport sleep disruption on sleep logs if MSLT results have employment implications, making objective actigraphy data crucial, according to the American College of Chest Physicians 3, 4