As many as 30 percent to 50 percent of adults have a sleep disorder, many without seeking treatment and some not even knowing they have one. These disorders – insomnia, restless leg syndrome and jet lag are among the better-known ones – can worsen other health issues, such as blood pressure, anxiety and cardiovascular disease, says Karen Klingman, PhD, an associate professor of nursing at Upstate who specializes in sleep disorders. She explains the six basic sleep disorders, tells of a sleep questionnaire she is developing to help doctors diagnose sleep problems and suggests sources of advice on the recommended amount of sleep one needs and related issues.