Annals of Internal Medicine. TABLE Affectinh Factors for Obstructive Sleep Apnea. Some people find it annoying to awaken spontaneously at a. TABLE Selected Primary Sleep Parasomnias. Insomnia qakefulness a common sleep disorder that can make dleep hard to disorfers asleep or stay asleep. It also can cause you to wake up sleep disorders affecting wakefulness early and not be able to get back to sleep. You may still feel tired when you wake up. Insomnia can drain your energy level and affect your mood. It also can affect your health, work performance and quality of life. How much sleep is enough varies from person to person.