Gender code X

Identifying and definitional attributes

Metadata item type:Value Domain
METeOR identifier:741825
Registration status:Health, Candidate 06/10/2021

A code set representing gender.

Representational attributes

Representation class:Code
Data type:String
Maximum character length:1
Permissible values:
1Man, or boy, or male
2Woman, or girl, or female
4Different term
5Prefer not to answer
Supplementary values:
9Not stated/inadequately described

Collection and usage attributes

Guide for use:

This Value Domain is based on the Australian Bureau of Statistics Standard for sex, gender, variations of sex characteristics and sexual orientation variables (ABS 2021). The values are defined as follows:

CODE 1     Man, or boy, or male

A person who describes their gender as man, or boy, or male.

CODE 2     Woman, or girl, or female  

A person who describes their gender as woman, or girl, or female.

CODE 3     Non-binary

A person who describes their gender as non-binary.

CODE 4     Different term

A person who describes their gender as a term other than man/boy/male, woman/girl/female or non-binary.

CODE 5     Prefer not to answer

A person who prefers not to respond on how they describe their gender.


Alternative Codes

The ABS Standard also allows for the following Alternative Code system, which can be mapped to the Codes specified above:

CODE M     Man, or boy, or male

CODE F     Woman, or girl, or female  

CODE X     Non-binary

CODE T     Different term

CODE Z     Prefer not to answer


Mapping Codes

The ABS Standard also allows for the categories for gender to be mapped as follows:

  • Man, or boy

Includes CODE 1

  • Woman, or girl

Includes CODE 2

  • Non-binary

Includes CODES 3 and 4 

  • Not stated

Includes CODES 5 and 9.

Collection methods:

CODE 9     Not stated or inadequately described.

This supplementary value is used to code inadequately described responses and non-responses for gender. It is not to be used on primary collection forms. It is primarily for use in administrative collections when transferring data from data sets where the item has not been collected.


Former versions of this Value Domain contained only three permissible values:

CODE 1   Male

CODE 2   Female

CODE 3   Other (formerly 'Gender other/diverse')

Source and reference attributes

Submitting organisation:

Australian Institute of Health and Welfare.


ABS (Australian Bureau of Statistics) 2021. Standard for sex, gender, variations of sex characteristics and sexual orientation variables. Canberra: ABS, viewed 6 October 2021 

AGD (Attorney-General's Department) 2015. Australian Government Guidelines on the Recognition of Sex and Gender, viewed 6 October 2021 

Relational attributes

Related metadata references:

Supersedes Gender code X Health, Standard 11/05/2017, ACT Health, Final 02/01/2019

Data elements implementing this value domain:

Person—gender, code X Health, Candidate 06/10/2021