. Author manuscript; available in PMC: 2018 May 1.

Published in final edited form as: Eur J Med Genet. 2017 Feb 27;60(5):250–256. doi: 10.1016/j.ejmg.2017.02.007

Table 1.

Baseline Characteristics of Individuals with Williams Syndrome, Siblings, and NHANES Matched Controls

	Williams Syndrome (N = 56)	Siblings (N = 24)	Matched Controls (N = 162)
Sex (% Male / % Female)	39.3 / 60.7	45.8 / 54.2	39.3 / 60.7
Age (years)	21.3 ± 12.4	20.2 ± 14.6	21.0 ± 12.5
Race/Ethnicity (N (%))
Non-Hispanic White	46 (82.1%)	19 (79.2%)	138 (82.1%)
Hispanic	5 (8.9%)	2 (8.3%)	15 (8.9%)
Other	5 (8.9%)	3 (12.5%)	15 (8.9%)
Age at Menarche (years, females)	11.3 ± 1.6	12.7 ± 1.7	Not Available

Data are mean ± standard deviation (SD) unless otherwise noted.