The study was published this month online in Menopause,
the journal of the North American Menopause Society.
"Our findings emphasize the importance of assessing
cardiovascular disease risk status when hormone therapy is considered for
relief of menopausal symptoms," wrote the WHI investigators who authored
the study.
Metabolic syndrome is a group of risk factors that occur together
and increase the risk of heart disease, stroke, and diabetes. They include a
large waistline, high blood pressure, high blood glucose or diabetes, high
triglycerides, or low HDL -- the "good cholesterol." Obesity is the
key feature, which predisposes women to the others.
In this analysis, a woman was considered to have metabolic
syndrome if she had three of any of the five metabolic syndrome features; 269
women met the criteria when they started the trial and were compared with 695
women who did not have metabolic syndrome.
The women who did not have metabolic syndrome showed no increased
risk of heart disease, whether they took hormones or not. But the risk of a
heart attack or dying of heart disease was more than double for women who had
metabolic syndrome and took hormones (either combined estrogen-progestogen or
estrogen alone if they had undergone hysterectomy) compared with women who had
metabolic syndrome and did not take hormones. Women with metabolic syndrome who
took estrogen alone had a smaller increase in risk, but they were still at
significantly higher risk than women with metabolic syndrome who did not take
hormones.
In the WHI, women took oral formulations of hormone therapy, which
were common at the time. Today, smaller doses and other forms, such skin
patches or gels, are being used. In addition, women in the WHI were older
(average age 66 in this analysis) than the age women usually start hormone
therapy for menopause symptoms, such as hot flashes and night sweats. Newer
formulations and earlier use of hormone therapy may be safer, but more study
needs to be done to find out if having metabolic syndrome makes a difference
with these types of hormone therapy.
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