After adjusting for various factors, including
age, body mass index, and previous cardiovascular events,
the researchers found that severe obstructive sleep apnea was
associated with an increased risk of death from cardiovascular
causes (heart attack, stroke, heart failure, or arrhythmia),
and that CPAP reduced this risk. Women with severe
obstructive sleep apnea who used CPAP were no more likely
to die of cardiovascular causes than women without obstructive
sleep apnea. The women with mild to moderate sleep apnea
did not have an increased risk of cardiovascular death,
whether they were treated with CPAP or not