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Centenarian "birthright" (birth order)

 
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A1CR
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PostPosted: Wed Apr 12, 2006 4:05 am    Post subject: Centenarian "birthright" (birth order) Reply with quote

Perhaps more stuff to *factor out* of longitudinal CR studies -- when it comes to Okinawan stats** (and maybe even CR'd animal stats, and Luigi's study ca. 2123 Wink -- are individuals' birth *orders*:

"...the predictor that most struck researchers, who sifted through 75 million U.S. genealogical records to find centenarians born between 1875 and 1899, was birth order. First-born daughters were three times more likely to survive to 100 than their youngest sisters. Twice as many first-born sons reached 100 than boys born fourth or sixth. The odds rebounded, however, for sons born ninth or later. The study posits that younger siblings might suffer from diluted family resources, less parental attention, and their mothers' 'biological depletion'."(1)

This info is not really new, but the graphic on this page makes the data a bit friendlier to comprehend.

-Khurram

1. http://magazine.uchicago.edu/0602/investigations/fig1.shtml
2. http://longevity-science.blogspot.com/

**May also be useful to know the avg number of children an Okinawan (or a Luigi CRONie or a CR animal) family has. E.g. if it's 2 vs. 3, then there would be more centenarians (or otherwise longevous/healthier members) likely in the former.
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