Pain Chronicity Threshold

Self Report and Electronic Health Record (EHR)

Description of Instrument

Pain Chronicity Threshold: The International Association for the Study of Pain defines chronic pain as “pain that persists or recurs for longer than three months,” and International Classification of Disease (ICD) diagnoses of chronic pain similarly use a 3-month threshold for establishing a minimum chronicity threshold (e.g., Nicholas et al., 2019). For clinical trials of treatments for chronic pain, IMMPACT recommends a 6-month minimum for pain duration (Dworkin et al., 2012), which we apply here.

The IASP classification of chronic pain for ICD-11: chronic primary pain.


Nicholas M, Vlaeyen JWS, Rief W, Barke A, Aziz Q, Benoliel R, Cohen M, Evers S, Giamberardino MA, Goebel A, Korwisi B, Perrot S, Svensson P, Wang SJ, Treede RD; IASP Taskforce for the Classification of Chronic Pain.  Pain. 2019 Jan;160(1):28-37. PMID: 30586068