News tagged with representative sample

Prevalence of visual impairment in US increases

The prevalence of nonrefractive visual impairment (not due to need for glasses) in the U.S. has increased significantly in recent years, which may be partly related to a higher prevalence of diabetes, an associated risk factor, ...

Dec 11, 2012
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Sexual orientation has 'in between' groups, study shows

Sexual orientation is best represented as a continuum that has two new categories -- "mostly heterosexual" and "mostly gay/lesbian" -- in addition to heterosexual, bisexual or gay/lesbian, according to a new Cornell study.

May 09, 2012
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