May 15 Close to one in three people in the
United States may sleepwalk during their lives, according to a
U.S. study that said severe depression and other sleep disorders
may increase the possibility.
A survey of 16,000 adults in 15 states found about 29
percent said they had sleepwalked at least once in their lives,
close to three percent did it between once a year and once a
month, and one percent sleepwalked at least twice per month.
"We did not know what was the prevalence of sleepwalking -
as a disorder - in the general population, and that was a big
problem," said Maurice Ohayon, director of the Stanford Sleep
Epidemiology Research Center in California, who led the study,
which appeared in the journal Neurology.
Past research on sleepwalking was mostly based on studies
conducted in a lab, but Ohayon said he wanted to know what was
actually happening in peoples' homes.
The survey asked participants about their lifestyle and
sleeping habits, overall health and whether they had any sleep,
mental or other types of disorders, including sleepwalking.
It found that certain people were more likely to sleepwalk,
including those with sleep apnea or insomnia, heavy drinkers and
people taking sleeping pills.
Participants on antidepressants known as selective serotonin
reuptake inhibitors seemed to have a higher risk for
sleepwalking, but the researchers said this could be explained
by the conditions those drugs treat. Both major depression and
OCD were also linked to sleepwalking.
Ohayon's team reported that close to one-third of
sleepwalkers said they had a family history of sleepwalking .
"I'm not too surprised by the results," said Timothy Young,
a neurologist and sleep medicine specialist with the Mayo Clinic
Health System in Eau Claire, Wisconsin.
Young, who was not involved in the research, said that
sleepwalking is thought to be common during childhood, but
tapers off as people get older. Past studies have shown that 30
percent of children may be sleepwalkers, the researchers wrote.
According to Young, sleepwalking covers a spectrum of
actions from sleep talking to getting out of bed. He told
Reuters Health it becomes a problem when people start walking
down stairs or outside.
The study was partially funded by the U.S. National
Institutes of health, the Arrillaga Foundation, the Bing
Foundation and Neurocrines Biosciences, which is a
(Reporting from New York by Andrew Seaman at Reuters Health;
Editing by Elaine Lies and Michael Perry)