| Sleep disorders (eg, obstructive sleep apnea [OSA], narcolepsy) |
| Medical or psychiatric conditions which may interfere with sleep continuity and sleep quality (eg, cardiopulmonary disorders, pain syndromes, mood disorders) |
| Use of sedating medications (eg, benzodiazepines, nonbenzodiazepine hypnotics, opioids) or alcohol |
| Driving conditions (eg, long distance, late at night, lone driving) |
| Circadian factors (eg, night or rotating shift work, jet lag) |
| Lifestyle factors (eg, working multiple jobs, parenting infants) |
| Insufficient sleep |
| History of fall-asleep crash or near-miss |
