A Demographic Profile Of Vegetarians And Non-Vegetarians
Explores health-related attitudinal and behavioral differences between vegetarians and non-vegetarians otherwise matched in demographics.
This study found no differences between the cultural, ethnic or familiar backgrounds of vegetarians and non-vegetarians, when matched for age and sex.
Vegetarians appeared to socialize more than non-vegetarians and were less influenced by parents and religion, and were slightly less educated and more often employed in less skilled occupations.
The commitment to vegetarianism is strong and seems to be supported by a network of family and friends who are also vegetarians, which was particularly strong for those who practiced the most restrictive forms of vegetarianism.

Citations:
Jeanne Freeland-Graves, Ph.D., R.D., Sue Greninger, Ph.D., Robert Young, Ph.D., University of Texas at Austin, 1986 United States (National)