Other sleep disorders can be associated with the following: 
sleep state misperception (people who complain in hospitals that they don't sleep at all, are sometimes observed by nurses to be sleeping.) narcolepsy, restless legs syndrome, sleep related abnormal swallowing syndrome, primary snoring, psychoses, mood disorders, anxiety disorders, alcoholism, dementia, parkinsonism, sleep-related headaches, sleep related asthma, peptic ulcer disease, pregnancy associated sleep disorder, menstrual associated sleep disorder, sleep choking syndrome, inadequate sleep hygiene, altitude insomnia, food allergy insomnia [...].