{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,20]],"date-time":"2026-09-20T22:10:30Z","timestamp":1789942230869,"version":"4.0.1"},"reference-count":47,"publisher":"Journal of Orthopaedic & Sports Physical Therapy (JOSPT)","issue":"1","content-domain":{"domain":["www.jospt.org"],"crossmark-restriction":true},"short-container-title":["Journal of Orthopaedic &amp; Sports Physical Therapy"],"published-print":{"date-parts":[[2019,1]]},"abstract":"<jats:sec><jats:title>Background<\/jats:title><jats:p> Knowledge of patellofemoral osteoarthritis (OA) pain trajectories is vital to helping clinicians and patients make shared disease-specific decisions regarding treatment options and coping strategies. <\/jats:p><\/jats:sec><jats:sec><jats:title>Objectives<\/jats:title><jats:p> To describe the pain trajectories of people living with patellofemoral OA who present to a chronic care management program, and to explore baseline characteristics associated with different trajectories. <\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p> In this prospective longitudinal cohort study, 88 participants who presented to a chronic care management program reported their worst pain over the previous week at baseline and at 6, 12, 18, and 26 weeks using a 10-cm visual analog scale. Trajectories (classes) were identified using latent class growth analysis. Demographics, pain, physical performance, strength, quality of life, mental health, and lower limb\/foot structural measures obtained at baseline were assessed for association with trajectory class membership. <\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p> Individuals in class 1 (28%) exhibited high, persistent pain from baseline (7.8 \u00b1 1.7 cm), which continued over time (P = .52). Class 2 (57%) displayed moderate baseline pain (4.8 \u00b1 1.8 cm), which also remained persistent (P = .97). Individuals in class 3 (15%) showed low, improving pain (baseline pain, 2.6 \u00b1 1.2 cm) over time (P = .017). At baseline, poor Knee injury and Osteoarthritis Outcome Score (KOOS) scores, local and proximal sensitivity to pressure, and lower knee extensor strength were associated with increased odds of following the high-pain trajectory (range [95% confidence interval], 1.03 [1.00, 1.07] to 16.24 [2.53, 104.34]). <\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p> Distinct pain trajectories appear to exist in people with patellofemoral OA presenting to a chronic care management program. Baseline variables may be useful for identifying individuals at risk of poorer prognosis. Larger studies are needed to confirm the efficacy of this finding. <\/jats:p><\/jats:sec><jats:sec><jats:title>Level of Evidence<\/jats:title><jats:p> Prognosis, level 2b. J Orthop Sports Phys Ther 2019;49(1):5\u201316. Epub 12 Sep 2018. doi:10.2519\/jospt.2019.8354 <\/jats:p><\/jats:sec>","DOI":"10.2519\/jospt.2019.8354","type":"journal-article","created":{"date-parts":[[2018,9,13]],"date-time":"2018-09-13T00:44:27Z","timestamp":1536799467000},"page":"5-16","update-policy":"https:\/\/doi.org\/10.2519\/jospt.crossmarkpolicy","source":"Crossref","is-referenced-by-count":6,"title":["Exploratory Study of 6-Month Pain Trajectories in Individuals With Predominant Patellofemoral Osteoarthritis: A Cohort Study"],"prefix":"10.2519","volume":"49","author":[{"given":"Kathryn","family":"Mills","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jillian P.","family":"Eyles","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael A.","family":"Martin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mark J.","family":"Hancock","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David J.","family":"Hunter","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1394","reference":[{"key":"bib1","volume-title":"Osteoarthritis Chronic Care Program Site Manual","author":"Agency for Clinical Innovation","year":"2013"},{"key":"bib2","doi-asserted-by":"publisher","DOI":"10.1002\/art.1780290816"},{"key":"bib3","doi-asserted-by":"publisher","DOI":"10.1016\/j.pain.2010.04.003"},{"key":"bib4","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpsychores.2007.11.009"},{"key":"bib5","doi-asserted-by":"publisher","DOI":"10.3399\/bjgp15X688129"},{"key":"bib6","doi-asserted-by":"publisher","DOI":"10.1037\/1082-989X.8.3.338"},{"key":"bib7","doi-asserted-by":"publisher","DOI":"10.1002\/acr.20538"},{"key":"bib8","doi-asserted-by":"publisher","DOI":"10.7326\/M16-1714"},{"key":"bib9","doi-asserted-by":"publisher","DOI":"10.1093\/eurheartj\/suv035"},{"key":"bib10","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2014.03.009"},{"key":"bib11","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2012.07.011"},{"key":"bib12","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2011.05.005"},{"key":"bib13","doi-asserted-by":"publisher","DOI":"10.1002\/acr.23005"},{"key":"bib14","doi-asserted-by":"publisher","DOI":"10.1002\/acr.22693"},{"key":"bib15","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2013.05.002"},{"key":"bib16","doi-asserted-by":"publisher","DOI":"10.1097\/j.pain.0000000000000351"},{"key":"bib17","doi-asserted-by":"publisher","DOI":"10.1136\/ard.2011.151050"},{"key":"bib18","doi-asserted-by":"publisher","DOI":"10.1093\/rheumatology\/kei270"},{"key":"bib19","doi-asserted-by":"publisher","DOI":"10.1002\/1529-0131(200008)43:8<1874::AID-ANR25>3.0.CO;2-2"},{"key":"bib20","doi-asserted-by":"publisher","DOI":"10.1016\/0141-5425(84)90053-0"},{"key":"bib21","doi-asserted-by":"publisher","DOI":"10.3899\/jrheum.131475"},{"key":"bib22","doi-asserted-by":"publisher","DOI":"10.1002\/art.38025"},{"key":"bib23","doi-asserted-by":"publisher","DOI":"10.1071\/PY13064"},{"key":"bib24","doi-asserted-by":"publisher","DOI":"10.1093\/rheumatology\/kem114"},{"key":"bib25","doi-asserted-by":"publisher","DOI":"10.1002\/art.21836"},{"key":"bib26","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0147406"},{"key":"bib27","doi-asserted-by":"publisher","DOI":"10.3233\/BMR-140525"},{"key":"bib28","doi-asserted-by":"publisher","DOI":"10.1136\/annrheumdis-2012-202984"},{"key":"bib29","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2013.05.017"},{"key":"bib30","doi-asserted-by":"publisher","DOI":"10.1002\/acr.22691"},{"key":"bib31","doi-asserted-by":"publisher","DOI":"10.1186\/s12891-017-1486-4"},{"key":"bib32","first-page":"7","volume":"57","author":"Jordan K","year":"2007","journal-title":"Br J Gen Pract."},{"key":"bib33","doi-asserted-by":"publisher","DOI":"10.1136\/ard.16.4.494"},{"key":"bib34","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2014.01.003"},{"key":"bib35","doi-asserted-by":"publisher","DOI":"10.1186\/1757-1146-2-6"},{"key":"bib36","volume-title":"Osteoarthritis: Care and Management in Adults","author":"National Clinical Guideline Centre","year":"2014"},{"key":"bib38","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(04)17277-2"},{"key":"bib39","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2014.09.026"},{"key":"bib40","doi-asserted-by":"publisher","DOI":"10.1016\/j.apmr.2007.10.028"},{"key":"bib41","doi-asserted-by":"publisher","DOI":"10.1097\/j.pain.0000000000000121"},{"key":"bib42","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2014.02.008"},{"key":"bib43","doi-asserted-by":"publisher","DOI":"10.1016\/j.joca.2015.07.024"},{"key":"bib44","doi-asserted-by":"publisher","DOI":"10.1002\/acr.20528"},{"key":"bib45","doi-asserted-by":"publisher","DOI":"10.1136\/ard.2007.080945"},{"key":"bib46","doi-asserted-by":"publisher","DOI":"10.1002\/art.24543"},{"key":"bib47","doi-asserted-by":"publisher","DOI":"10.1136\/ard.2004.022905"},{"key":"bib48","doi-asserted-by":"publisher","DOI":"10.3899\/jrheum.141036"}],"container-title":["Journal of Orthopaedic &amp; Sports Physical Therapy"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.jospt.org\/doi\/pdf\/10.2519\/jospt.2019.8354","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,8,26]],"date-time":"2024-08-26T13:46:39Z","timestamp":1724679999000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.jospt.org\/doi\/10.2519\/jospt.2019.8354"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,1]]},"references-count":47,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2019,1]]}},"alternative-id":["10.2519\/jospt.2019.8354"],"URL":"https:\/\/doi.org\/10.2519\/jospt.2019.8354","relation":{},"ISSN":["0190-6011","1938-1344"],"issn-type":[{"value":"0190-6011","type":"print"},{"value":"1938-1344","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,1]]},"assertion":[{"value":"2018-12-31","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}