see also Visual Analog Scale.
The Numeric Rating Scale (NRS-11) is an 11-point scale for patient self-reporting of pain. It is for adults and children 10 years old or older.
Rating Pain Level
0 No Pain
1–3 Mild Pain (nagging, annoying, interfering little with ADLs)
4–6 Moderate Pain (interferes significantly with ADLs)
7–10 Severe Pain (disabling; unable to perform ADLs)