I was not aware of this.
Please supply, refer to, or link to statistical details.
The best literature is on the Pima Indians, who have been studied extensively.
http://www.ajcn.org/cgi/content/abstract/53/6/1577S
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7988310&dopt=Abstract
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8981960&dopt=Abstract
Other data is through epidemiological studies:
http://jama.ama-assn.org/cgi/content/full/292/23/2860
And distribution of obesity by race:
http://www.obesity.org/subs/fastfacts/obesity_youth.shtmlAfrican American, Hispanic American and Native American children and adolescents have particularly high obesity prevalence.
* Among female youth, the highest overweight and obesity prevalence is found in black (non-Hispanic) girls (ages 6 to 11), 37.6 percent and 22.2 percent respectively, and black (non-Hispanic) adolescent females (ages 12 to 19), 45.5 percent and 26.6 percent respectively.
* Among male youth, the highest overweight and obesity prevalence is found in Mexican American boys (ages 6 to 11), 43 percent and 27.3 percent respectively, and Mexican American adolescent males (ages 12 to 19), 44.2 percent and 27.5 percent respectively.
* Overweight prevalence for Native American children and adolescents (ages 5 to 17) was reported in a 1999 study as 39 percent for males and 38 percent for females in the Aberdeen area Indian Health Service.
* Asian American adolescents (ages 13 to 18) were reported to have an overweight prevalence of 20.6 percent in the 1996 National Longitudinal Study of Adolescent Health.
* Asian-American and Hispanic-American adolescents born in the U.S. to immigrant parents are more than twice as likely to be overweight as foreign born adolescents who move to the U.S.