WEDNESDAY, April 3 (HealthDay News) -- New research out of Japan shows a potential link between male baldness and an increased risk for coronary heart disease.
But it only affects men who are balding on top. Those with a receding hairline are not at risk, the researchers reported.
The findings stem from an analysis of six published studies on hair loss and heart health that involved approximately 37,000 men.
And although the researchers admitted the small study size was a limitation, they reported that men whose baldness affected the crown on their head faced a 32 percent to 84 percent increase in the risk of developing heart disease compared to men with a full head of hair or a receding hairline.
Study lead author Dr. Tomohide Yamada, of the department of diabetes and metabolic diseases at the University of Tokyo's Graduate School of Medicine, in Japan, reported his findings in the current issue of the journal BMJ Open and called for more research on the topic. Although the research review found an association between baldness and heart disease risk, it did not prove a cause-and-effect link.
Male pattern baldness (technically referred to as "androgenetic alopecia") affects up to 40 percent of adult men and is the most common type of hair loss, the researchers reported. By age 80, about four in five men will experience this form of baldness.
To explore the link to heart disease, the researchers analyzed databases covering the period 1950 through 2012. Out of 850 related investigations, they selected six studies, all published between 1993 and 2008 in the United States, Denmark or Croatia.
In the three studies that tracked patients for a minimum of 11 years, the research showed that, overall, balding men face a 33 percent greater risk for heart disease than other men, and those between 55 and 60 years old faced an even higher risk (44 percent
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