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. Author manuscript; available in PMC: 2018 Feb 1.
Published in final edited form as: J Sex Res. 2016 May 5;54(2):172–185. doi: 10.1080/00224499.2016.1170757

Table 4.

Age Reached Sexual Orientation Developmental Milestones by Gender and Sexual Orientation Group for Female (N=1235) and Male (N=398) Young Adults, Ages 22 to 29 Years, in the Growing Up Today Study who Reported Any Same-Gender Orientation in 2010

Females (age in years, M, SD)

Milestones Lesbian (n = 84) Bisexual (n = 127) Mostly heterosexual (n = 776) Hetero w/same-gender sexual experience (n = 248) Sexual Orientation Comparison (p-values) Sexual Orientation Comparison (Cohen’s d)
Same-gender attraction 14.8 (4.4) 14.5 (4.3) 17.3 (3.8) 17.3 (3.1) <.001 0.08
Other-gender attraction 12.6 (3.9) 10.5 (3.4) 9.6 (3.2) 9.3 (3.2) <.001 0.04
Same-gender sexual experience 18.3 (3.5) 17.9 (4.0) 18.0 (4.3) 18.1 (4.4) 0.91 <.001
Other-gender sexual experience 15.5 (3.7) 15.9 (2.9) 16.5 (2.6) 15.6 (2.5) <.001 0.02
Sexual minority identity 17.6 (3.7) 16.9 (4.0) 17.7 (3.9) 16.4 (4.3) 0.05 0.01

Males (age in years, M, SD)

Milestones Gay (n = 88) Bisexual (n = 16) Mostly heterosexual (n = 188) Hetero w/same-gender sex exper (n = 96) Sexual Orientation Comparison (p-values) Sexual Orientation Comparison (Cohen’s d)

Same-gender attraction 11.9 (3.6) 16.4 (4.3) 17.3 (4.7) 14.8 (5.4) <.001 0.26
Other-gender attraction 11.7 (4.3) 10.7 (3.4) 9.7 (3.2) 8.2 (2.8) <.001 0.10
Same-gender sexual experience 16.9 (3.7) 18.7 (3.9) 16.3 (5.8) 12.4 (5.7) <.001 0.16
Other-gender sexual experience 17.4 (3.2) 17.1 (2.2) 16.8 (3.0) 15.8 (4.2) 0.035 0.03
Sexual minority identity 15.0 (3.9) 15.9 (2.8) 17.9 (4.0) 13.0 (5.3) <.001 0.13

Females vs. Males (p-values)

Milestones Lesbian/gay Bisexual Mostly heterosexual Hetero w/same-gender sex exper

Same-gender attraction <.001 .10 .91 .11
Other-gender attraction .25 .87 .78 .003
Same-gender sexual experience .01 .54 .03 <.001
Other-gender sexual experience .01 .16 .17 .74
Sexual minority identity <.001 .40 .68 .04

Note. The sexual minority identity milestone refers to lifetime sexual minority identification reported prior to sexual orientation endorsed in 2010. Sexual orientation in 2010 was used to create the sexual orientation subgroups. Reported p-values are from ANOVAs for timing.