Table 1.

Characteristics of repeated measures observations of Growing Up Today Study participants aged 20–35 years, by sex assigned at birth (2010, 2016, N=17,364)

	Assigned Female at Birth (n=11,755)		Assigned Male at Birth (n=5,609)
Characteristic	n	%	n	%
Sexual Orientation
Completely heterosexual	8,844	75.2	4,731	84.4
Mostly heterosexual	2,284	19.4	557	9.9
Lesbian/gay/bisexual	627	5.3	321	5.7
Gender Identity
Cisgender/non-gender minority	11,671	99.3	5549	98.9
Gender minority	84	0.7	60	1.1
Race/Ethnicity
Non-Hispanic white	10,914	92.9	5,223	93.1
Other	841	7.2	386	6.9
Cohort
GUTS1	9,224	78.5	4,453	79.4
GUTS2	2,531	21.5	1,156	20.6
Region of Residence
West	2,065	17.6	1,107	19.7
Midwest	3,766	32.0	1,797	32.0
South	2,120	18.0	939	16.7
Northeast	3,804	32.4	1,766	31.5
Age, mean (standard deviation)		27.0 (3.2)		26.9 (3.2)

Note: Percentages within variables sum to 100% except for rounding error.