Table 2.

Differences between Mean Sleep Latency Test and Maintenance of Wakefulness test.

	MSLT	MWT
Measure of sleep resistance		*
Measure of sleep propensity	*
Pathological values	≤8 min	≤19 min
Measure of REM sleep intrusion	*
PSG night before	Mandatory	Recommended
Sensitivity to sleep deprivation	**	**
Fitness to drive		**
Diagnosis of narcolepsy	*
Treatment response (drugs, behavior, CPAP)		**
Correlation with ESS	Weak to moderate	Weak to moderate
Correlation with reaction tests	Weak to moderate	Moderate to strong

The number of stars indicates the appropriateness of test for each of the items. MSLT, multiple sleep latency test. MWT, maintenance of wakefulness test. REM, rapid-eye-movement. PSG, polysomnography. CPAP, continuous positive airway pressure. ESS, excessive daytime sleepiness.