Accidents
In the workplace, the effects of too little sleep are revealed by reduced efficiency and productivity, errors, and accidents. Yet decreased driving ability is a very real-world risk associated with sleep debt. One study found an increased incidence of sleep-related crashes in drivers reporting less than seven hours of sleep per night on average. Additional contributing factors to these crashes included poor sleep quality, dissatisfaction with sleep duration, and daytime sleepiness. According to the National Highway Traffic Safety Administration, "drowsy driving" causes over 100,000 car crashes each year, resulting in about 1,550 deaths.