Conundrum of mechanical knee symptoms: signifying feature of a meniscal tear?. Thorlund, J. B., Pihl, K., Nissen, N., Jørgensen, U., Fristed, J. V., Lohmander, L. S., & Englund, M. British Journal of Sports Medicine, 53(5):299–303, March, 2019.
Conundrum of mechanical knee symptoms: signifying feature of a meniscal tear? [link]Paper  doi  abstract   bibtex   
Background Mechanical knee symptoms are often considered important in the decision to perform knee arthroscopy on the suspicion of a meniscal tear. We investigated if presence of a meniscal tear at knee arthroscopy in adults is associated with presence of preoperative self-reported mechanical knee symptoms. Methods We used data from Knee Arthroscopy Cohort Southern Denmark (KACS). KACS consists of patients aged 18 years or older referred to knee arthroscopy on the suspicion of a meniscal tear at four recruiting hospitals between 1 February 2013 and 31 January 2015. Of 1259 invited patients, 908 (72%) replied to the baseline questionnaire. With 91 patients excluded, the study sample consisted of 641 and 176 patients with and without a meniscal tear confirmed at surgery, respectively. Exposure was meniscal tear as determined by the knee surgeon during arthroscopy. Main outcomes were preoperative mechanical knee symptoms defined as self-reported catching/locking or self-reported inability to straighten knee fully. Results 55% of all patients reported symptoms of catching/locking and 47% were unable to straighten their knee fully. Preoperative mechanical symptoms were equally prevalent in patients with and without a meniscal tear (prevalence ratio catching/locking 0.89, 95% CI 0.77 to 1.03, and inability to straighten knee fully, prevalence ratio 1.02, 95% CI 0.84 to 1.23). Interpretation Patient-reported mechanical symptoms were equally common irrespective of presence or absence of a meniscal tear in patients undergoing arthroscopy for suspicion of a meniscal tear. Our findings suggest that mechanical knee symptoms have a limited value when considering indication for meniscal surgery. Trial registration number NCT01871272; Results.
@article{thorlund_conundrum_2019,
	title = {Conundrum of mechanical knee symptoms: signifying feature of a meniscal tear?},
	volume = {53},
	copyright = {© Author(s) (or their employer(s)) 2018. No commercial re-use. See rights and permissions. Published by BMJ.},
	issn = {0306-3674, 1473-0480},
	shorttitle = {Conundrum of mechanical knee symptoms},
	url = {https://bjsm.bmj.com/content/early/2018/08/31/bjsports-2018-099431},
	doi = {10.1136/bjsports-2018-099431},
	abstract = {Background Mechanical knee symptoms are often considered important in the decision to perform knee arthroscopy on the suspicion of a meniscal tear. We investigated if presence of a meniscal tear at knee arthroscopy in adults is associated with presence of preoperative self-reported mechanical knee symptoms.
Methods We used data from Knee Arthroscopy Cohort Southern Denmark (KACS). KACS consists of patients aged 18 years or older referred to knee arthroscopy on the suspicion of a meniscal tear at four recruiting hospitals between 1 February 2013 and 31 January 2015. Of 1259 invited patients, 908 (72\%) replied to the baseline questionnaire. With 91 patients excluded, the study sample consisted of 641 and 176 patients with and without a meniscal tear confirmed at surgery, respectively. Exposure was meniscal tear as determined by the knee surgeon during arthroscopy. Main outcomes were preoperative mechanical knee symptoms defined as self-reported catching/locking or self-reported inability to straighten knee fully.
Results 55\% of all patients reported symptoms of catching/locking and 47\% were unable to straighten their knee fully. Preoperative mechanical symptoms were equally prevalent in patients with and without a meniscal tear (prevalence ratio catching/locking 0.89, 95\% CI 0.77 to 1.03, and inability to straighten knee fully, prevalence ratio 1.02, 95\% CI 0.84 to 1.23).
Interpretation Patient-reported mechanical symptoms were equally common irrespective of presence or absence of a meniscal tear in patients undergoing arthroscopy for suspicion of a meniscal tear. Our findings suggest that mechanical knee symptoms have a limited value when considering indication for meniscal surgery.
Trial registration number NCT01871272; Results.},
	language = {en},
	number = {5},
	urldate = {2018-10-04},
	journal = {British Journal of Sports Medicine},
	author = {Thorlund, Jonas Bloch and Pihl, Kenneth and Nissen, Nis and Jørgensen, Uffe and Fristed, Jakob Vium and Lohmander, L. Stefan and Englund, Martin},
	month = mar,
	year = {2019},
	pmid = {30170997},
	keywords = {Adult, Arthroscopy, Denmark, Female, Humans, Knee Injuries, Male, Prevalence, Prospective Studies, Self Report, Tibial Meniscus Injuries, Young Adult, arthroscopy, epidemiology, knee, meniscal pathology, osteoarthritis},
	pages = {299--303},
}

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