Which pain assessment tool is commonly used as a 'fifth vital sign' for adults?

• A. Wong-Baker Faces Scale
• B. Visual Analog Scale
• C. FLACC Scale
• D. Numeric Rating Scale (0–10)

Answer: (D)

Pain is best captured when the person who experiences it can report how much it hurts right now. The Numeric Rating Scale, a 0 to 10 self-report measure, is the most efficient way to do this for adults. It’s quick, easy to use at the bedside, and works across a wide range of ages and settings. A score of 0 means no pain and 10 represents the worst possible pain, which gives a clear, numeric point to monitor over time and to guide analgesia decisions. Because it boils pain into a single, intuitive number, it aligns well with daily workflow, electronic health record documentation, and quality metrics, making it the go-to tool for routinely assessing pain, often described as the fifth vital sign.

Other scales have their uses, but they’re less practical for routine adult assessment. The Wong-Baker faces scale is more suited to children or individuals with communication challenges who can’t quantify pain verbally. The Visual Analog Scale requires marking on a line and can be harder for some patients to use consistently, especially in busy or acute care settings. The FLACC scale is observational and designed for nonverbal children, not a self-report measure for adults.