(HealthDay News) -- Insomnia -- the inability to fall asleep or stay asleep -- affects more women than men, and older people more than younger ones.
The U.S. National Heart, Lung, and Blood Institute says people at increased risk for insomnia include those who:
- Are stressed.
- Are depressed or have emotional health issues, such as those going through divorce or the death of a spouse.
- Have lower incomes.
- Work at night or have frequent changes in work hours.
- Travel across time zones.
- Don't exercise regularly.