People with a chronic medical condition are at a higher risk of insomnia. A recent study which involved 772 adult men and women who reported on their sleep, physical and mental health condition, found that people who have insomnia report statistically higher rates of gastrointestinal problems, high blood pressure, chronic pain and problems with breathing and urination. The study also revealed that people with such problems report more chronic insomnia than people without such medical problems.
SLEEP vol 32 (7)-wed July 01, 2009