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Research on this condition in the ageing population is sparse. Further, the heterogeneity of patients with back pain complicates the management in clinical care. It is possible that subgrouping people with similar characteristics would improve management. This paper aimed to identify latent classes based on demographics, pain characteristics, psychosocial behavior, and beliefs and attitudes about back pain, among older patients seeking primary care with a new episode of back pain, and to examine if there were differences regarding the classes\u2019 first point-of-contact.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>The study was part of the international BACE (Back complaints in elders) consortium and included 435 patients aged\u2009\u2265\u200955 years seeking primary care (general practitioners, physiotherapists, and chiropractors) in Norway from April 2015 to March 2020. A latent class analysis was performed to identify latent classes. The classes were described in terms of baseline characteristics and first point-of-contact in primary care.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Four latent classes were identified. The mean age was similar across groups, as were high expectations towards improvement. Class 1 (<jats:italic>n<\/jats:italic>\u2009=\u2009169, 39%), the \u201cpositive\u201d class, had more positive attitudes and beliefs, less pain catastrophizing and shorter duration of current pain episode. Class 2 (<jats:italic>n<\/jats:italic>\u2009=\u200931, 7%), the \u201cfearful\u201d class, exhibited the most fear avoidance behavior, and had higher mean pain intensity. Class 3 (<jats:italic>n<\/jats:italic>\u2009=\u200933, 8%), the \u201cdistressed\u201d class, had the highest scores on depression, disability, and catastrophizing. Finally, class 4 (<jats:italic>n<\/jats:italic>\u2009=\u2009202, 46%), the \u201chopeful\u201d class, showed the highest expectations for recovery, although having high pain intensity. The identified four classes showed high internal homogeneity, sufficient between-group heterogeneity and were considered clinically meaningful. The distribution of first point-of-contact was similar across classes, except for the positive class where significantly more patients visited chiropractors compared to general practitioners and physiotherapists.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>The identified classes may contribute to targeting clinical management of these patients. Longitudinal research on these latent classes is needed to explore whether the latent classes have prognostic value. Validation studies are needed to evaluate external validity.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Trial registration<\/jats:title>\n                <jats:p>Clinicaltrials.gov NCT04261309.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12891-024-07163-0","type":"journal-article","created":{"date-parts":[[2024,1,13]],"date-time":"2024-01-13T04:26:00Z","timestamp":1705119960000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Identifying latent subgroups in the older population seeking primary health care for a new episode of back pain \u2013 findings from the BACE-N cohort"],"prefix":"10.1186","volume":"25","author":[{"given":"Lise Kretz","family":"Gr\u00f8ndahl","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Iben","family":"Ax\u00e9n","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Silje","family":"Stensrud","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Trynke","family":"Hoekstra","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"\u00d8rjan Nesse","family":"Vigdal","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rikke Munk","family":"Killingmo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kjersti","family":"Storheim","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Margreth","family":"Grotle","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,1,13]]},"reference":[{"issue":"5","key":"7163_CR1","doi-asserted-by":"publisher","first-page":"366","DOI":"10.2471\/BLT.17.204891","volume":"96","author":"AM Briggs","year":"2018","unstructured":"Briggs AM, Woolf AD, Dreinhofer K, Homb N, Hoy DG, Kopansky-Giles D, et al. 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All included patients completed an informed consent to participate-form.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent"}},{"value":"Not applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"60"}}