Objective Tests for Sleep Disorders
When indicated, objective sleep tests may be required to determine the presence of a sleep disorder.
Objective tests for sleep disorders include:
Severity (apnea-hypopnea index):
More than 30 episodes per hour of sleep is considered a diagnosis of obstructive sleep apnea.
Self-Reported Sleepiness Surveys
Simple sleepiness surveys may be useful for obtaining driver self-assessment of sleepiness status. Examples of sleepiness surveys include:
NOTE: Self-reported sleepiness does NOT always correlate with objective testing (polysomnography). The driver may not perceive sleepiness as excessive or may be hesitant to disclose sleepiness.
For more information, see Tech Brief: A Study of Prevalence of Sleep Apnea Among Commercial Truck Drivers.
The complete text of the medical conference reports can be accessed from FMCSA Medical Reports