Demographics

Adults

As of February 19, 2015, the Registry has 8,895 adult twin pairs (17,790 individuals). New pairs are enrolled every month. Below is a detailed breakdown of the UW Twin Registry population, calculated from the survey that twins complete when they join the Registry.

Age:
18-19 years old: 1.5%
20-29 years old: 23.3%
30-39 years old: 23.7%
40-49 years old: 14.0%
50-59 years old: 13.8%
60-69 years old: 14.1%
70-79 years old: 6.6%
80 years or older: 2.9%

Ethnicity:
Hispanic/Latino: 3.5%

Race:
White: 89.1%
Asian: 3.2%
Black: 2.3%
American Indian/Alaska Native: 2.1%
Pacific Islander: 0.5%
Other: 2.5%
More than one race: 0.3%

Zygosity:
Identical: 53.8%
Fraternal: 46.2%

Sex:
Male/Male pairs: 28.1%
Female/Female pairs: 50.0%
Male/Female pairs: 21.9%

 

Kids

As of February 19, 2015, the Registry has 511 youth twin pairs (1,022 individuals). New pairs are enrolled every month. Below is a detailed breakdown of the UW Twin Registry population, calculated from the survey that twins complete when they join the Registry.

Age:
4 years old and younger: 24.5%
5-9 years old: 14.5%
10-14 years old: 12.1%
15-17 years old: 48.9%

Ethnicity:
Hispanic/Latino: 9.4%

Race:
White: 79.0%
Asian: 5.0%
Black: 3.6%
American Indian/Alaska Native: 2.8%
Pacific Islander: 2.2%
Other: 6.6%
More than one race: 0.8%

Zygosity:
Identical: 51.4%
Fraternal: 48.6%

Sex:
Male/Male pairs: 31.7%
Female/Female pairs: 42.7%
Male/Female pairs: 25.6%