There are studies comparing longevity at least. http://www.scientificintegrityinstitute.org/prevmed2008lifes...

active Mormons from age 25 (Anderson, 1999). Males had a life expectancy of 84.1 years, which was 9.8 years greater than that of 1989–1991 U.S. white males. Females had a life expectancy of 86.1 years, which was 5.6 years greater than that of 1989–1991 U.S. white females