TABLE 1. Sexual identity and sexual contact questions on the Youth Risk Behavior Survey — United States, 2021.

Question	Student response		Description for analysis
Sexual identity
Which of the following best describes you? 1) Heterosexual (straight), 2) gay or lesbian, 3) bisexual, 4) I describe my sexual identity some other way, 5) I am not sure about my sexual identity (questioning), or 6) I do not know what this question is asking	Heterosexual (straight) (1)		Heterosexual students (1)
	Gay or lesbian (2) or bisexual (3)		Lesbian, gay, or bisexual students (2 or 3)
	Other (4) or questioning (5)		Other or questioning students (4 or 5)
	Did not understand (6)		Students missing sexual identity variable (6)
Sex of sexual contacts
During your life, with whom have you had sexual contact? 1) I have never had sexual contact, 2) females, 3) males, or 4) females and males What is your sex? 1) Female, or 2) male	I have never had sexual contact*		Students who had no sexual contact
	Contact: Female Male	Student: Male Female	Students who had sexual contact with only the opposite sex
	Contact: Male Females and males Female Females and males	Student: Male§ Male Female†,§ Female	Students who had sexual contact with only the same sex or with both sexes

* Excluded from analyses on sexual behaviors.

^† Excluded from analyses on condom use.

^§ Excluded from analyses on dual use of condoms and birth control.