Michael Rack, MD
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Doctors and patients alike are beginning to realize that
sleep apnea in women is more common than previously thought. Men remain
statistically more likely to develop obstructive sleep apnea (OSA), but instead
of a ten-to-one ratio of men to women, it’s now thought to be three- or
four-to-one. At the same time, women also remain more likely to have sleep
apnea misdiagnosed as something else, such as chronic fatigue syndrome,
depression or simple insomnia.
OSA occurs when the soft tissues of the throat and at the
back of the mouth become overly relaxed at night, to the point where one’s
airflow is blocked upon breathing in. This results in a few seconds of not
breathing, which may be evidenced by snoring or gasping for breath during one’s
sleep, followed by daytime sleepiness. Though women with OSA may have these signs, they seem to
appear more often in men. Women with sleep apnea may notice their mouths being
very dry in the morning. They may also begin to wake up more often during the
night with the need to urinate. This is not
due to any real increase in urine production, but because the partial waking
that often occurs in OSA allows a person to notice the state of their bladder
more than when they are sleeping soundly.
The risk for OSA increases as a woman ages and it is
sometimes said that menopause increases the risk for it. However, here again,
appearances may be deceiving, with menopause getting the blame for simple
changes in soft tissue tone that come with aging. Another risk factor for OSA
in women, just as in men, is being overweight or obese. This is simply due to
the increased thickness of throat tissues that begin to accumulate fat cells.
In some studies, as many as 80% of obese women screened for sleep apnea were found
to have the condition. It can also flare up due to the weight gain of
pregnancy. Drinking alcohol before bed time also increases the likelihood of
OSA, as does smoking.
Though women are still a bit less likely than men to have
OSA, it unfortunately appears that their risk of mortality from it is greater
than in men. The reason for this is not clear, but it seems to be especially
true in regards to heart and circulation problems, i.e., decreased cardiovascular health. It was recently reported
that OSA increases the risk of developing so-called ‘soft’ plaques in
atherosclerosis (hardening of the arteries), which are more likely to come
loose from blood vessel walls and form an embolus, blockage of an artery or
vein.
If a woman has sleep apnea, especially if she is overweight
or obese, she has a greater risk during pregnancy of developing the
life-threatening condition called pre-eclampsia, or of needing to deliver her
baby by caesarian section. Since pregnancy itself somewhat raises the risk of
OSA, this seems a real life case of double jeopardy! A pregnant woman may also
be more apt to attribute daytime sleepiness or fatigue to simply carrying a
baby, rather than to other possible causes.
For all these reasons, it is especially important for women
to know that they, too, are at risk for sleep apnea. If there are signs of dry
mouth, excessive daytime sleepiness, or any reports from her partner that she
is snoring, a woman should not hesitate to ask her doctor if she might have
sleep apnea. It is diagnosed definitively by performing an overnight sleep
study at the hospital. Because OSA can have serious health repercussions if
left untreated, insurance companies typically cover both the sleep study and the
therapy the condition requires if found. Women and men alike thus have nothing
to lose with a sleep
study, and may also gain a much better night’s sleep for their efforts.
Guest
article by Alex Smith of SleepDisorders.com.