Pain catastrophizing

Pain catastrophizing is the tendency to describe a pain experience in more exaggerated terms than the average person, to ruminate on it more (e.g., "I kept thinking 'this is terrible'"), and/or to feel more helpless about the experience ("I thought it was never going to get better").[1] People who report a large number of such thoughts during a pain experience are more likely to rate the pain as more intense than those who report fewer such thoughts.

It is generally assumed that the tendency to catastrophize plays a causal role in the pain experience – that is, it causes the person to experience the pain as more intense. One suggestion is that catastrophizing influences pain perception through altering attention and anticipation, and heightening emotional responses to pain.[2] However, we cannot yet rule out the possibility that at least some aspects of catastrophization may actually be the product of an intense pain experience, rather than its cause. That is, the more intense the pain feels to the person, the more likely they are to have thoughts about it that fit the definition of catastrophization.[3]

Measurement

The components of catastrophizing that are considered primary were long under debate until the development of the pain catastrophizing scale (PCS). The pain catastrophizing scale is a 13-item self-report scale to measure pain catastrophizing created by Michael J. L. Sullivan, Scott R. Bishop and Jayne Pivik.[4] In the PCS, each item is rated on a 5-point scale: 0 (Not at all) to 4 (all the time). It is broken into three subscales being magnification, rumination, and helplessness. The scale was developed as a self-report measurement tool that provided a valid index of catastrophizing in clinical and non-clinical populations.[5] It is hypothesized [6] that pain catastrophizing is related to various levels of pain, physical disability and psychological disability in clinical and nonclinical populations.

Pain catastrophizing scale
  1. I worry all the time about whether the pain will end. (H)
  2. I feel I can't go on. (H)
  3. It's terrible and I think it's never going to get any better. (H)
  4. It's awful and I feel that it overwhelms me. (H)
  5. I feel I can't stand it anymore. (H)
  6. I become afraid that the pain may get worse. (M)
  7. I think of other painful experiences. (M)
  8. I anxiously want the pain to go away. (R)
  9. I can't seem to keep it out of my mind. (R)
  10. I keep thinking about how much it hurts. (R)
  11. I keep thinking about how badly I want the pain to stop. (R)
  12. There is nothing I can do to reduce the intensity of the pain. (H)
  13. I wonder whether something serious may happen. (M)

(Note: For the listed items above, (R) Rumination, (M) Magnification, and (H) Helplessness.)

Before the development of the PCS there had been no other self-report measurement tool that focused primarily on catastrophizing. Other self-report measurement tools such as: the Coping Strategies Questionnaire (CSQ), the Pain-Related Self-Statements Scale (PRSS) and the Cognitive Coping Strategy Inventory (CCS) had subscales for assessing catastrophizing but failed to explore specific dimensions of catastrophizing.[7]

Studies of the PCS have generally used a self-report design. Participants are asked about pain experiences in their past; they then rate how well various statements fit their thoughts and feelings at the time. Several such studies have shown the PCS to be invariant, with most accuracy in the three oblique factor structure, across genders and both clinical and non-clinical groups. The gender focused study expressed that female subjects report more frequent experiences of pain, varied intensity with increased persistence, and lower pain tolerances and thresholds.[8] However, it is important to remember that these studies ask participants to report on pain experiences from their past; the overall level of pain experienced is not controlled across genders. If female participants have, on average, experienced more intense and/or persistent pain in their past than male participants, this could also explain their higher endorsement of items relating to pain catastrophizing. Further, more controlled studies are urgently needed to tease apart these issues of cause and effect.

With minimal modification, to address the subject of the catastrophizing, the PCS can also be applied to pain catastrophizing in a social context. The social aspects studied were parents of disabled children and spouses of individuals with chronic pain. Specifically it has been shown to determine illness related stress and depression issues that arise from parent's catastrophizing about their child's pain in regards to a disability or illness.[9] Similarly with respect to pain catastrophizing between romantic partners, spouse catastrophizing about a partner's chronic pain was related to depressive and pain severity levels in both spouses.[10]

Applications

Research on pain catastrophizing has found that catastrophic thinking is associated with a more intense experience of pain. It is generally believed that the catastrophic thoughts cause the person to experience pain more intensely. This may in turn lead to increased use of health care and longer hospital stays.[1] Following this logic, if the catastrophic thinking can be addressed, then the person's pain experience might also be reduced, which in turn might reduce health care utilization. The use of scales such as the PCS may be useful for measuring pain catastrophizing in these contexts.[2]

Treatment

The primary treatment for pain catastrophizing is cognitive behavior therapy for chronic pain.[11] This is typically delivered in individual psychotherapy sessions, or in group pain coping skills classes. These sessions and classes typically span 6 to 12 weeks, and cover a variety of psychobehavioral topics in addition to pain catastrophizing.[11] In 2014, researchers at Stanford University found that a single-session class that they developed specifically to treat pain catastrophizing was effective.[12] However, to date, there have been no studies that meet the usual standards required for medical treatment intervention studies (for example, where patients are randomly allocated to a treatment or an appropriate control condition, and patients are unaware of which condition is expected to be associated with the better outcome).

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References
  1. Van Damme, S.; Crombez, G.; Bijttebier, P.; Goubert, L.; Houdenhove, B. V. (2001). "A confirmatory factor analysis of the Pain Catastrophizing Scale: invariant factor structure across clinical and non-clinical populations". International Association for the Study of Pain. 96 (3): 319–324. doi:10.1016/S0304-3959(01)00463-8. PMID 11973004.
  2. Gracely, R. H.; Geisser, M. E.; Giesecke, T.; Grant, M. A.; Petzke, F.; Williams, D. A.; Clauw, D. J. (2004). "Pain catastrophizing and neural responses to pain among persons with fibromyalgia". Brain. 127 (4): 835–843. doi:10.1093/brain/awh098. PMID 14960499.
  3. Severeijns, R; van den Hout, MA; Vlaeyen, JW (June 2005). "The causal status of pain catastrophizing: an experimental test with healthy participants". European Journal of Pain. 9 (3): 257–65. doi:10.1016/j.ejpain.2004.07.005. PMID 15862475.
  4. Sullivan, Michael J. L.; Bishop, Scott R.; Pivik, Jayne (1995). "The Pain Catastrophizing Scale: Development and validation". Psychological Assessment. 7 (4): 524–532. doi:10.1037/1040-3590.7.4.524.
  5. Sullivan, M. J.; Bishop, S. R.; Pivik, J. (1995). "The Pain Catastrophizing Scale: Development And Validation". Psychological Assessment. 7 (4): 524–532. doi:10.1037/1040-3590.7.4.524.
  6. Osman, Augustine; Barrios, Francisco X.; Kopper, Beverly A.; Hauptmann, Wendy; Jones, Jewel; O'Neill, Elizabeth (1997). "Factor structure, reliability, and validity of the Pain Catastrophizing Scale". Journal of Behavioral Medicine. 20 (6): 589–605. doi:10.1023/a:1025570508954. PMID 9429990.
  7. Osman, Augustine; Barrios, Francisco X.; Gutierrez, Peter M.; Kopper, Beverly A.; Merrifield, Traci; Grittmann, Lee (2000). "The Pain Catastrophizing Scale: Further Psychometric Evaluation with Adult Samples". Journal of Behavioral Medicine. 23 (4): 351–365. doi:10.1023/A:1005548801037. PMID 10984864.
  8. D'Eon, J. L.; Harris, C. A.; Ellis, J. A. (2004). "Testing Factorial Validity And Gender Invariance Of The Pain Catastrophizing Scale". Journal of Behavioral Medicine. 27 (4): 361–372. doi:10.1023/b:jobm.0000042410.34535.64. PMID 15559733.
  9. Goubert, L.; Eccleston, C.; Vervoort, T.; Jordan, A.; Crombez, G. (2006). "886 Parental Catastrophizing About Their Child's Pain. The Parent Version of the Pain Catastrophizing Scale (PCS-P): A Preliminary Validation". European Journal of Pain. 10: S229c–S229. doi:10.1016/S1090-3801(06)60889-6.
  10. Cano, Annmarie; Leonard, Michelle T.; Franz, Aleda (2005). "The Significant Other Version of the Pain Catastrophizing Scale (PCS-S): Preliminary Validation". Pain. 119 (1–3): 26–37. doi:10.1016/j.pain.2005.09.009. PMC 2679670. PMID 16298062.
  11. Williams, Amanda C de C.; Eccleston, Christopher; Morley, Stephen (2012). "Psychological therapies for the management of chronic pain (Excluding headache) in adults". Cochrane Database of Systematic Reviews. 11: CD007407. doi:10.1002/14651858.CD007407.pub3. PMC 6483325. PMID 23152245.
  12. Darnall, Beth; Sturgeon, John; Kao, Ming-Chih; Hah, Jennifer; MacKey, Sean (2014). "From Catastrophizing to Recovery: A pilot study of a single-session treatment for pain catastrophizing". Journal of Pain Research. 7: 219–26. doi:10.2147/JPR.S62329. PMC 4008292. PMID 24851056.
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