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Long term trajectories of chronic widespread pain: a 21-year prospective cohort latent class analysis
Högskolan i Halmstad, Akademin för hälsa och välfärd, Centrum för forskning om välfärd, hälsa och idrott (CVHI). RandD Spenshult, Halmstad, Sweden & Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.ORCID-id: 0000-0003-4260-7399
Research Institute for Primary Care and Health Sciences, Keele University, Keele, United Kingdom & Midlands Partnership NHS Foundation Trust, Stafford, United Kingdom.
Research Institute for Primary Care and Health Sciences, Keele University, Keele, United Kingdom.
University of Oxford, CSM, NDORMS, Oxford, United Kingdom.ORCID-id: 0000-0002-5172-512X
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2019 (engelsk)Inngår i: Annals of the Rheumatic Diseases, ISSN 0003-4967, E-ISSN 1468-2060, Vol. 78, nr Suppl 2, s. 239-239Artikkel i tidsskrift, Meeting abstract (Fagfellevurdert) Published
Abstract [en]

Background: Chronic widespread pain (CWP) is common (population prevalence of approximately 10%) and has a significant impact on the individual, healthcare, and society. Currently little is known about the actual course of CWP over time, in particular the pathways to the development and maintenance of CWP. One useful way to understand these pathways is to identify common clusters of people who share pain trajectories. Such information is clinically useful to identify factors that predict development, persistence, and resolution of CWP.

Objectives: To identify different longitudinal pain trajectories over a period of 21 years.

Methods: A 21-year longitudinal open-population cohort of n=1858 adults (aged 20-74) who completed surveys relating to their pain status in at least three of the five time points 1995, 1998, 2003, 2007, and 2016. Pain status (presence of persistent pain) was ascertained from a report of painful regions (0-18) on a pain mannequin and categorised into: NCP (No chronic pain), CRP (Chronic regional pain) and CWP (chronic widespread pain). Latent Class Growth Analysis (LCGA) was carried out based on these categories. Participants were assigned to a trajectory cluster where the posterior probability was the highest. Model fit was assessed by statistical indices and clinical interpretations of clusters.

Results: LCGA identified five clusters describing different pathways of NCP, CRP and CWP over the 21 years. The cluster “Persistent NCP” was the most common pathway (n = 1052, 57%) representing those with no chronic pain over the whole time period. The “Persistent CRP or Migration from CRP to NCP” cluster included 411 individuals (22%) representing a group with stable or improving regional pain. In the groups who were shown to increase pain status, the “Migration from NCP to CRP or CWP” cluster included 92 individuals (5%), and there were 184 individuals (10%) in the cluster “Migration from CRP to CWP” representing a group with regional pain who developed CWP. The final cluster “Persistent CWP” included 119 individuals (6%) representing those with stable CWP throughout the time period. Figure 1 presents the mean number of pain sites over time by cluster.

Conclusion: This study showed that whilst half of adults report no chronic pain over 21 years, a substantial proportion develop CWP or have persistent CWP over this time period. Whilst a common trajectory was movement from chronic regional pain to no chronic pain, a pattern of improving CWP was not seen suggesting this is an uncommon trajectory. This is the first study to show long-term trajectories for CWP, and further work is now required to understand factors that may identify individuals at risk of worsening pain status and factors that might promote improvement. These identified pathways of chronic pain over a lifespan improve the understanding of long-term development of chronic pain and chronic widespread pain. © Aili et al. 2019. No commercial re-use. See rights and permissions. Published by BMJ.

sted, utgiver, år, opplag, sider
London, UK: BMJ Publishing Group Ltd, 2019. Vol. 78, nr Suppl 2, s. 239-239
Emneord [en]
Chronic pain, public health
HSV kategori
Identifikatorer
URN: urn:nbn:se:hh:diva-40943DOI: 10.1136/annrheumdis-2019-eular.2993ISI: 000472207100527OAI: oai:DiVA.org:hh-40943DiVA, id: diva2:1370134
Konferanse
Annual European Congress of Rheumatology (EULAR 2019), Madrid, Spain, June 12-15, 2019
Tilgjengelig fra: 2019-11-14 Laget: 2019-11-14 Sist oppdatert: 2019-11-27bibliografisk kontrollert

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Aili, KatarinaBremander, AnnBergman, Stefan

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