CaBIG Flavors of Null

caBIG Flavors of Null

Introduction

Some of the code sets being considered by the caBIG VCDE working group included concept codes that didn't fit the same category as the rest of the codes. As an example, the Sex/Gender Candidate Data Standard included the code "Unknown", which meant "unknown, not observed, not recorded, or refused". Rather than being a possible value representing gender, "unkon