Gender Code: The code representing the gender of a person

Code	Display	Definition
0	Unknown	Not known, not observed, not recorded, or refused.
1	Male	A person who belongs to the sex that normally produces sperm. The term is used to indicate biological sex distinctions, cultural gender role distinctions, or both.
2	Female	A person who belongs to the sex that normally produces ova. The term is used to indicate biological sex distinctions, or cultural gender role distinctions, or both.
3	Not specified	Not specified