Demographics

As of April 13, 2015, the Registry has 9,465 twin pairs (18,930 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:
9 years old and under: 2.2%
10-19 years old: 4.7%
20-29 years old: 21.7%
30-39 years old: 22.7%
40-49 years old: 13.2%
50-59 years old: 13.1%
60-69 years old: 13.5%
70-79 years old: 6.3%
80+ years old: 2.8%

Ethnicity:
Hispanic/Latino: 3.8%

Race:
White: 88.4%
Asian: 3.4%
Black: 2.4%
American Indian/Alaska Native: 2.1%
Pacific Islander: 0.5%
Other: 2.8%
More than one race: 0.4%

Zygosity:
Identical: 53.8%
Fraternal: 46.2%

Sex:
Male/Male pairs: 28.2%
Female/Female pairs: 49.7%
Male/Female pairs: 22.1%

Zygosity/Sex:
MZ Male pairs: 19.2%
DZ Male pairs: 8.8%
MZ Female pairs: 34.3%
DZ Female pairs: 14.8%
DZ Male/Female pairs: 22.9%

Where are our members located? 

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