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. 2018 Sep 10;172(11):1090–1092. doi: 10.1001/jamapediatrics.2018.2496

Child Sexual Orientation and Gender Identity in the Adolescent Brain Cognitive Development Cohort Study

Jerel P Calzo 1,, Aaron J Blashill 2
PMCID: PMC6584307  PMID: 30208469

Abstract

This survey study queried children and parents on the child’s sexual orientation and gender identity.


Sexual and gender minorities (ie, individuals who do not identify as heterosexual and those whose gender identities differ from their birth sex) experience significantly elevated physical and mental health morbidities compared with heterosexual and cisgender individuals.1 By collecting sexual orientation and gender identity (SOGI) data in a US representative cohort of 9- to 10-year-old children, the recently released Adolescent Brain Cognitive Development (ABCD) Study2 provides an opportunity to understand the development of health disparities and resilience by SOGI at earlier ages than previous research. Both children and parental figures reported SOGI data, bolstering measurement rigor. Baseline analysis of ABCD Study SOGI data can contextualize the opportunities afforded by the data set for epidemiologic surveillance.

Methods

The ABCD Study currently provides 2 SOGI-related measures, self-identification and identity-related stress. Baseline data collection began September 1, 2016; the present study used ABCD annual release data from February 12, 2018. Children self-reported whether they self-identify as gay or bisexual and whether they identify as transgender (Table 1 displays question and response options) via researcher-administered computer-assisted interviews. A response of yes or maybe for each question, indicating probable sexual or gender minority identity, triggered follow-up questions about identity-related stress (Table 2 displays question and response options). A parental figure reported on the child’s identity and stress with similar questions. Parents also reported on their child’s potential gender minority identity via a 2-step process based on the child’s sex assigned at birth and current gender identity. The ABCD Study used complex sampling to recruit youth representative of 9- to 10-year old children in the United States (eg, regarding race/ethnicity, income, and family relationships).2 Thus, results display raw observations and population-weighted estimates.

Table 1. Minority Sexual Orientation and Gender Identity at Ages 9 to 10 Years From the ABCD Study, 2016-2017a.

Report No. (%)
Raw Weighted
Child Self-report
Sexual orientation
Are you gay or bisexual? n = 4519 n = 8204014
Yes 11 (0.2) 19 554 (0.2)
Maybe 32 (0.7) 51 398 (0.6)
No 3402 (75.3) 6 188 308 (75.4)
Did not understand 1074 (23.8) 1 944 754 (23.7)
Gender identity
Are you transgender? n=4520 n=8205599
Yes 5 (0.1) 6610 (0.1)
Maybe 18 (0.4) 26 965 (0.3)
No 2768 (61.2) 4 873 466 (59.4)
Did not understand 1729 (38.3) 3 298 558 (40.2)
Parent Report
Sexual orientation
Is your child gay? n = 4523 n = 8 208 302
Yes 1 (0) 2358 (0.02)
Maybe/don’t know 331 (7.3) 552 316 (6.7)
No 4158 (91.9) 7 596 612 (92.5)
Decline to answer 33 (0.7) 57 016 (0.7)
Gender identity
Is your child transgender? n = 4523 n = 8 208 302
Yes 2 (0) 3269 (0.04)
Maybe/don’t know 49 (1.1) 95 463 (1.2)
No 4453 (98.5) 8 072 322 (98.3)
Decline to answer 19 (0.4) 37 249 (0.5)
2-Step gender identification
Current gender identity (sex assigned at birth) n = 4524 n = 8 201 374
Female (male) 1 (0) 1313 (0.02)
Trans female (male) 1 (0) 1683 (0.02)
Male (female) 3 (0) 5300 (0.06)
Different identity (female) 1 (0) 954 (0.01)
Female (intersex male) 2 (0) 3251 (0.04)

Abbreviation: ABCD, Adolescent Brain Cognitive Development.

a

Raw values represent observation in the ABCD Study data set. Poststratification weights were used to match the 2010 US Census. Percentages reported herein are based on population-level estimates.

Table 2. Sexual Orientation– and Gender Identity–Related Stress at Ages 9 to 10 Years From the ABCD Study, 2016-2017a.

Report No. (%)
Raw Weighted
Child Self-report
Sexual orientation
Has this caused problems for you with your family or at school? n = 43 n = 70 952
Not at all 41 (95.3) 68 257 (96.2)
Some 2 (4.7) 2695 (3.8)
A lot 0 0
Gender identity n = 23 n = 33 575
Has this caused problems for you with your family or at school?
Not at all 22 (95.7) 31 891 (95.0)
Some 1 (4.3) 1683 (5.0)
A lot 0 0
Parent Report
Sexual orientation
Has this caused problems for you/your child with your family or with kids at school? n = 332 n = 554 674
Not at all 306 (92.2) 504 347 (90.9)
Some 21 (6.3) 39 083 (7.0)
A lot 0 0
Decline to answer 5 (1.5) 11 244 (2.0)
Gender identity
Has this caused problems for you/your child with your family or with kids at school? n = 51 n = 98 732
Not at all 43 (84.3) 79 955 (81.0)
Some 7 (13.7) 15 089 (15.3)
A lot 0 0
Decline to answer 1 (2.0) 3687 (3.7)

Abbreviation: ABCD, Adolescent Brain Cognitive Development.

a

Raw values represent observations in the ABCD Study data set. Poststratification weights were used to match the 2010 US Census. Percentages reported herein are based on population-level estimates.

The institutional review board at the University of California, San Diego, approved the overall ABCD Study protocol. Approval of secondary analysis of SOGI data was obtained from the institutional review board of San Diego State University. Parents and children participated after providing informed consent/assent, and were reimbursed for their participation.

Results

Coding yes and maybe responses as probable minority SOGI identities, approximately 0.86% (raw, n = 43; weighted, n = 70 952) of children self-identified as gay or bisexual. Nearly a quarter of children (raw, n = 23.8%; weighted, n = 23.7%) indicated that they did not understand the sexual orientation question. By contrast, 6.7% of parents (raw, n = 332; weighted, n = 554 674) indicated their child might be gay. For gender identity, 0.4% (raw, n = 23; weighted, n = 33 575) of children self-identified as transgender; 40.2% did not understand the question (raw, n = 1729; weighted, n = 3 298 558). A total of 1.2% (raw, n = 51; weighted, n = 98 732) of parents indicated that their child might identify as transgender. The 2-step gender identification method identified 0.15% of youth (raw, n = 8; weighted, n = 12 501) whose current gender identity differs from their birth sex.

Most children reported that their minority sexual orientation and/or gender identity was not a source of problems with family or school. Parents reported slightly more variance, with 7.0% reporting some problems related to sexual orientation (raw, n = 21; weighted, n = 39 083), and 15.3% reporting some problems with gender identity (raw, n = 7; weighted, n = 15 089). Neither children nor parents reported a lot of problems related to SOGI.

Discussion

The ABCD Study data indicate that less than 1% of US youth report minority sexual orientation or gender identities at age 9 to 10 years; youth and parent reports of SOGI information were generally discordant. A substantial number of youth indicated not understanding the SOGI questions, which may be attributed to measurement design1,3 or youth’s age and developmental stage.3,4,5 The study does not yet include other dimensions of SOGI (eg, same-gender attraction; gender expression) or other sexual orientation identities that youth may report (eg, pansexual)6; future inclusion or availability of such assessments may enhance identification of sexual and gender minority youth. Identifying as a sexual minority typically occurs in midadolescence4,5; thus, more youth in the ABCD Study cohort will likely identify as sexual minorities as the cohort ages. Contrary to prior research on minority stress,5 parents and youth indicated that minority sexual orientation and gender identity were not sources of substantial familial and school stress. However, this study did not examine SOGI indicators in association with health indicators. Future researchers should analyze the rich data available in the ABCD Study to understand how minority SOGI development is associated with health and resilience across adolescence.

References

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