In age notation, which abbreviation stands for 'years old'?

• A. yrs
• B. age
• C. y/o
• D. yo

Answer: (D)

Understanding how age is written in notes helps you read charts quickly. Years old is often shown as yo after the number, so “6 yo” means six years old. This shorthand is widely used in medical and pediatric documentation because it clearly and concisely communicates age. A slash version, y/o, serves the same purpose, but the form without the slash is the one identified here. The other options don’t specifically denote “years old”: yrs stands for years as a duration, age is just the word, and while y/o also means years old in many contexts, the shorthand used in quick notes is yo.