A recent small study of adult men compared how likely men were to be active based on how much sleep they got.

Previous studies on footwear and foot pain have been small or based on people with a particular disease.

A long-term study based on interviews, it was one of the most detailed clinical studies of schizophrenic patients and their families.

Their studies are interesting, but based on extremely shaky experimental methods.

Descriptive epidemiological study based on data from the Danish Cancer Registry.

A study based on data from 1978 through 1986 found very similar survival rates in both the United States and in Canada.

Employee medical records or studies or evaluations based on these records.

A biological study based on 62 patients.

A recent study based on a large scale analysis of robots.

The study based its findings on data culled from lawsuits, police sting operations and racial testing over the last 14 years.