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Table 1 Conceptual overview natal sex and current gender identity measurement using a two-step method in the growing up today study 1

From: Monitoring the health of transgender and other gender minority populations: Validity of natal sex and gender identity survey items in a U.S. national cohort of young adults

STEP 1: SEX
  What sex were you assigned at birth, on your original birth certificate? (check one)
   Female
   Male
STEP 2: GENDER IDENTITY
  How do you describe yourself? (check one)
   Female
   Male
   Transgender
   Do not identify as female, male, or transgender
  Assigned sex*
  Male Female
  (maternal-reported male sex on original birth certificate) (maternal-reported female sex on original birth certificate)
Current gender identity   
Male Cisgender male ± (male birth sex, male gender identity) Cross-sex male identity (female birth sex, male gender identity)
Female Cross-sex female identity (male birth sex, female gender identity) Cisgender female (female birth sex, female gender identity)
Transgender Transgender identity (male birth sex, transgender identity) Transgender identity (female birth sex, transgender identity)
Do not identify as male, female, or transgender Do not identify (male birth sex, some other diverse gender identity) Do not identify (female birth sex, some other diverse gender identity)
  1. *Infants born intersex are assigned either a female or male birth sex by a medical provider at birth.
  2. ± The term “cisgender” is used to refer to non-transgender males and females. The prefix “cis-” in Latin means “on this side of”, opposed to trans or ultra, across, beyond. Transgender is an umbrella term used to describe people whose sex assigned at birth is incongruent or different from their current gender identity or expression.