Wennberg R A, Tator C H
Division of Neurology, University Health Network, Toronto Western Hospital, University of Toronto, Toronto, ON, Canada.
Can J Neurol Sci. 2003 Aug;30(3):206-9. doi: 10.1017/s0317167100002596.
To examine the longitudinal media reported rate of concussions in the National Hockey League (NHL) over the period 1986-87 to 2001-02.
All injury reports published in the weekly sports newspaper The Hockey News for the 16 seasons 1986-87 through 2001-02 were reviewed for reported concussions. The Hockey News reports are based on weekly injury reports released by the NHL, which derive from reports submitted to the league by individual team offices.
Adjusted for changes in the number of teams and games per season over the 16 year study period, and expressed as: number of concussions per 1000 games, results by season (starting with 1986-87) were 4, 8, 7, 7, 5, 5, 7, 7, 6, 8, 13, 20, 30, 27, 30, 25. Comparing each season with the prior season, significant increases were reported in 1997-98 and 1998-99 (p < 0.05 and 0.025, respectively), with no change since 1998-99.
The reported concussion rate in the NHL during the last five years is more than triple that of the previous decade. Bigger, faster players, new equipment and harder boards and glass have all theoretically increased the risk of concussion in the NHL in recent years. However, the abrupt increase and subsequent plateau in concussion rate since 1997 suggests that increased recognition and reporting may be primarily responsible for the apparent increase in incidence.
研究1986 - 1987赛季至2001 - 2002赛季期间国家冰球联盟（NHL）媒体报道的脑震荡纵向发生率。
回顾了体育周报《冰球新闻》在1986 - 1987赛季至2001 - 2002赛季这16个赛季中发布的所有伤病报告，以获取报道的脑震荡情况。《冰球新闻》的报道基于NHL每周发布的伤病报告，这些报告来自各球队办公室提交给联盟的报告。
针对16年研究期间每个赛季球队数量和比赛场次的变化进行了调整，并以每1000场比赛的脑震荡次数表示，各赛季（从1986 - 1987赛季开始）的结果分别为4、8、7、7、5、5、7、7、6、8、13、20、30、27、30、25。将每个赛季与前一个赛季进行比较，1997 - 1998赛季和1998 - 1999赛季报告有显著增加（p值分别<0.05和0.025），自1998 - 1999赛季以来无变化。
NHL最近五年报道的脑震荡发生率是前十年的三倍多。从理论上讲，体型更大、速度更快的球员、新装备以及更硬的护板和玻璃都增加了近年来NHL中脑震荡的风险。然而，自1997年以来脑震荡发生率的突然上升及随后的平稳状态表明，认识和报告的增加可能是导致发病率明显上升的主要原因。
