** Rate your pain on a scale of 0 to 10 where, 0 is “no pain” and 10 is “pain as bad as could be” **
1. Von Korff M, Ormel J, Keefe FJ, Dworkin SF. Grading the severity of chronic pain. Pain. 1992 Aug;50(2):133-149. doi: 10.1016/0304-3959(92)90154-4. PMID: 1408309