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By Randy Dotinga HealthDay Reporter

WEDNESDAY, Jan. 28, 2015 (HealthDay News) -- Liberals are in luck when it comes to longevity, new research contends.

Compared to people with conservative and moderate political ideologies, liberals were less likely to die over the course of a 30-year review. But party lines did not determine life span, with Independents faring better than Republicans and Democrats, according to the study published Jan. 28 in the Journal of Epidemiology & Community Health.

Researchers not involved with the study were divided over what -- if anything -- the findings proved.

While the study authors tried to account for the influence of factors like race, education level and income, they didn't have any data regarding life choices such as diet, smoking and exercise. Liberals and Independents could simply be living more healthy lifestyles than other people, or the connection may be a coincidence, the researchers noted.

To complicate matters, liberals lived longer than Democrats.

Still, "there's got to be something going on," said study author Roman Pabayo, an assistant professor with the School of Community Health Sciences at the University of Nevada at Reno. Political views, he said, are "definitely a marker for something."

Researchers know a bit about how ideologies affect lives. According to Pabayo, "liberals are more likely to look at inequality in a negative way, while conservatives are considered more likely to be happier." But there's been little research into how political views may affect how long people live.

For the new study, Pabayo and his colleagues tracked almost 33,000 adults in the United States for about three decades. The researchers followed the volunteers, who joined the study between 1976 and 2008, for an average of 15 years.

The participants answered questions about their political views, although they didn't fit easily into boxes: Liberals weren't necessarily Democrats, and conservatives weren't necessarily Republicans. The study didn't analyze where their views fit along the political spectrum; it was only based on what the participants thought of themselves.

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