Risk of knee osteoarthritis after different types of knee injuries in young adults: a population-based cohort study. Snoeker, B., Turkiewicz, A., Magnusson, K., Frobell, R., Yu, D., Peat, G., & Englund, M. British Journal of Sports Medicine, 54(12):725–730, June, 2020.
Risk of knee osteoarthritis after different types of knee injuries in young adults: a population-based cohort study [link]Paper  doi  abstract   bibtex   
OBJECTIVES: To estimate the risk of clinically diagnosed knee osteoarthritis (OA) after different types of knee injuries in young adults. METHODS: In a longitudinal cohort study based on population-based healthcare data from Skåne, Sweden, we included all persons aged 25-34 years in 1998-2007 (n=149 288) with and without diagnoses of knee injuries according to International Classification of Diseases (ICD)-10. We estimated the HR of future diagnosed knee OA in injured and uninjured persons using Cox regression, adjusted for potential confounders. We also explored the impact of type of injury (contusion, fracture, dislocation, meniscal tear, cartilage tear/other injury, collateral ligament tear, cruciate ligament tear and injury to multiple structures) on diagnosed knee OA risk. RESULTS: We identified 5247 persons (mean (SD) age 29.4 (2.9) years, 67% men) with a knee injury and 142 825 persons (mean (SD) age 30.2 (3.0) years, 45% men) without. We found an adjusted HR of 5.7 (95% CI 5.0 to 6.6) for diagnosed knee OA in injured compared with uninjured persons during the first 11 years of follow-up and 3.4 (95% CI 2.9 to 4.0) during the following 8 years. The corresponding risk difference (RD) after 19 years of follow-up was 8.1% (95% CI 6.7% to 9.4%). Cruciate ligament injury, meniscal tear and fracture of the tibia plateau/patella were associated with greatest increase in risk (RD of 19.6% (95% CI 13.2% to 25.9%), 10.5% (95% CI 6.4% to 14.7%) and 6.6% (95% CI 1.1% to 12.2%), respectively). CONCLUSION: In young adults, knee injury increases the risk of future diagnosed knee OA about sixfold with highest risks found after cruciate ligament injury, meniscal tear and intra-articular fracture.
@article{snoeker_risk_2020,
	title = {Risk of knee osteoarthritis after different types of knee injuries in young adults: a population-based cohort study},
	volume = {54},
	issn = {1473-0480},
	shorttitle = {Risk of knee osteoarthritis after different types of knee injuries in young adults},
	url = {https://doi.org/10.1136/bjsports-2019-100959},
	doi = {10.1136/bjsports-2019-100959},
	abstract = {OBJECTIVES: To estimate the risk of clinically diagnosed knee osteoarthritis (OA) after different types of knee injuries in young adults.
METHODS: In a longitudinal cohort study based on population-based healthcare data from Skåne, Sweden, we included all persons aged 25-34 years in 1998-2007 (n=149 288) with and without diagnoses of knee injuries according to International Classification of Diseases (ICD)-10. We estimated the HR of future diagnosed knee OA in injured and uninjured persons using Cox regression, adjusted for potential confounders. We also explored the impact of type of injury (contusion, fracture, dislocation, meniscal tear, cartilage tear/other injury, collateral ligament tear, cruciate ligament tear and injury to multiple structures) on diagnosed knee OA risk.
RESULTS: We identified 5247 persons (mean (SD) age 29.4 (2.9) years, 67\% men) with a knee injury and 142 825 persons (mean (SD) age 30.2 (3.0) years, 45\% men) without. We found an adjusted HR of 5.7 (95\% CI 5.0 to 6.6) for diagnosed knee OA in injured compared with uninjured persons during the first 11 years of follow-up and 3.4 (95\% CI 2.9 to 4.0) during the following 8 years. The corresponding risk difference (RD) after 19 years of follow-up was 8.1\% (95\% CI 6.7\% to 9.4\%). Cruciate ligament injury, meniscal tear and fracture of the tibia plateau/patella were associated with greatest increase in risk (RD of 19.6\% (95\% CI 13.2\% to 25.9\%), 10.5\% (95\% CI 6.4\% to 14.7\%) and 6.6\% (95\% CI 1.1\% to 12.2\%), respectively).
CONCLUSION: In young adults, knee injury increases the risk of future diagnosed knee OA about sixfold with highest risks found after cruciate ligament injury, meniscal tear and intra-articular fracture.},
	language = {eng},
	number = {12},
	journal = {British Journal of Sports Medicine},
	author = {Snoeker, Barbara and Turkiewicz, Aleksandra and Magnusson, Karin and Frobell, Richard and Yu, Dahai and Peat, George and Englund, Martin},
	month = jun,
	year = {2020},
	pmid = {31826861},
	keywords = {Adult, Anterior Cruciate Ligament Injuries, Anterior Cruciate Ligament Injuries/complications, Cartilage, Articular, Cartilage, Articular/injuries, Contusions, Contusions/complications, Female, Fracture Dislocation, Fracture Dislocation/complications, Humans, Knee Injuries, Knee Injuries/*complications, Longitudinal Studies, Male, Osteoarthritis, Knee, Osteoarthritis, Knee/*epidemiology/etiology, Risk Factors, Sweden, Sweden/epidemiology, Tibial Fractures, Tibial Fractures/complications, Tibial Meniscus Injuries, Tibial Meniscus Injuries/complications, Time Factors, Young Adult, fracture, knee ACL, knee injuries, meniscus, osteoarthritis},
	pages = {725--730},
}

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