Report Viewer

NINDS CDE Notice of Copyright
Numeric Rating Scale (NRS)-Box 21 Scale
Please visit this website for more information about the instrument:Numeric Rating Scale (NRS)-Box 21 Scale
This instrument is freely available.
Supplemental: Parkinson's Disease (PD)
Short Description of Instrument
The Numeric Rating Scale (NRS) Box 21 Scale is a simple test that can help to identify a patients pain. The NRS is an internationally accepted and widely used approach to evaluate severity of pain.
Scoring and Psychometric Properties
Scoring: Pain is rated on a 0-10 numerical rating scale; self-administered; calculate a composite pain intensity NRS score from an average of 12 ratings across 4 days.
Psychometric Properties: For patients with chronic pain, test-retest reliability increases with increasing number of ratings on successive days (r=0.63-0.95); strong inter-rater reliability; MCID one point or 15% change in chronic musculoskeletal pain.
Strengths: Less than 3 minutes to administer
Weaknesses: Not specific for PD
Key Reference:
Jensen MP, McFarland CA. Increasing the reliability and validity of pain intensity measurement in chronic pain patients. Pain. 1993 Nov;55(2):195-203.
Additional References:
Dworkin RH, Turk DC, Farrar JT, Haythornthwaite JA, Jensen MP, Katz NP, Kerns RD, Stucki G, Allen RR, Bellamy N, Carr DB, Chandler J, Cowan P, Dionne R, Galer BS, Hertz S, Jadad AR, Kramer LD, Manning DC, Martin S, McCormick CG, McDermott MP, McGrath P, Quessy S, Rappaport BA, Robbins W, Robinson JP, Rothman M, Royal MA, Simon L, Stauffer JW, Stein W, Tollett J, Wernicke J, Witter J; IMMPACT. Core outcome measures for chronic pain clinical trials: IMMPACT recommendations. Pain. 2005 Jan;113(1-2):9-19.
Jensen MP, Miller L, Fisher LD. Assessment of pain during medical procedures:  a comparison of three scales. Clin J Pain. 1998 Dec;14(4):343-9.
Peters ML, Patijn J, LamÉ I. Pain assessment in younger and older pain patients: psychometric properties and patient preference of five commonly used measures of pain intensity. Pain Med. 2007 Oct-Nov;8(7):601-10.
Document last updated August 2022