{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T07:33:06Z","timestamp":1777879986146,"version":"3.51.4"},"reference-count":29,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2022,1,1]],"date-time":"2022-01-01T00:00:00Z","timestamp":1640995200000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Orthopaedic Journal of Sports Medicine"],"published-print":{"date-parts":[[2022,1,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Concussion injuries are common in professional hockey; however, their effect on player performance remains unclear.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>To quantify the effect of concussions on the performance of position players in the National Hockey League (NHL).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Study Design:<\/jats:title>\n                    <jats:p>Cohort study; Level of evidence, 3.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Concussion data from the NHL were collected using publicly available databases for the seasons between 2009-2010 and 2015-2016, coinciding with new NHL concussion rules. Age, body mass index, position, number of concussions during a player\u2019s NHL career, games played, and time on ice were recorded. Basic and advanced performance metrics were collected for 1 season pre- and postconcussion (short-term period) and 3 seasons before and after concussion (long-term period) to assess short- and long-term changes in performance. A control group of players without an identified concussion who competed during the study period was assembled for comparison. Wilcoxon signed rank tests were used to evaluate pre- to postconcussion data in the short- and long-term settings as well as to compare the cohorts at each time point.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>Overall, 48 players were identified as having a concussion during the study period. Players missed 17.2 \u00b1 15.1 days (mean \u00b1 standard deviation) and 7.5 \u00b1 6.9 games postconcussion. There were no significant differences in any metric when pre- and postconcussion intraseason performance was assessed. Athletes who were concussed demonstrated significantly deceased performance metrics (assists per 60 minutes, points per 60 minutes, Corsi percentage, and Fenwick percentage) in the 3 years after the concussion as compared with the year before injury ( P &lt; .05). However, no difference was found between the concussed group and matched control group in the short- or long-term period. Players with concussion played fewer career games (856.4 \u00b1 287.4 vs 725.7 \u00b1 215.0; P &lt; .05) than did controls.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>A high rate of NHL players were able to return to play after a concussion injury. Players with concussion did not experience a reduction in performance metrics in the short- or long-term setting when compared with matched controls. The concussed cohort maintained a similar workload up to 3 seasons postconcussion but played in fewer career games when compared with matched controls.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/23259671211052069","type":"journal-article","created":{"date-parts":[[2022,1,21]],"date-time":"2022-01-21T04:45:52Z","timestamp":1642740352000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":25,"title":["Concussions in the National Hockey League: Analysis of Incidence, Return to Play, and Performance"],"prefix":"10.1177","volume":"10","author":[{"given":"Erickson","family":"Andrews","sequence":"first","affiliation":[{"name":"Department of Orthopaedic Surgery, Henry Ford Hospital, Detroit, Michigan, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toufic R.","family":"Jildeh","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Henry Ford Hospital, Detroit, Michigan, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Muhammad J.","family":"Abbas","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Henry Ford Hospital, Detroit, Michigan, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kevin","family":"Lindsay-Rivera","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, Henry Ford Hospital, Detroit, Michigan, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jon","family":"Berguson","sequence":"additional","affiliation":[{"name":"Department of Orthopaedic Surgery, State University of New York\u2013Downstate Medical Center, Brooklyn, New York, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kelechi R.","family":"Okoroha","sequence":"additional","affiliation":[{"name":"Mayo Clinic, Rochester, Minnesota, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2022,1,21]]},"reference":[{"key":"bibr1-23259671211052069","doi-asserted-by":"publisher","DOI":"10.1503\/cmaj.092190"},{"issue":"5","key":"bibr2-23259671211052069","first-page":"283","volume":"98","author":"Biasca 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