Waldén M, Hägglund M, Ekstrand J
Department of Health and Society, Linköping University, S-581 83 Linköping, Sweden.
Br J Sports Med. 2006 Feb;40(2):158-62; discussion 158-62. doi: 10.1136/bjsm.2005.021055.
Anterior cruciate ligament (ACL) injury is a severe event for a footballer, but it is unclear if the knee injury rate is higher on returning to football after ACL injury.
To study the risk of knee injury in elite footballers with a history of ACL injury compared with those without.
The Swedish male professional league (310 players) was studied during 2001. Players with a history of ACL injury at the study start were identified. Exposure to football and all time loss injuries during the season were recorded prospectively.
Twenty four players (8%) had a history of 28 ACL injuries in 27 knees (one rerupture). These players had a higher incidence of new knee injury of any type than the players without ACL injury (mean (SD) 4.2 (3.7) v 1.0 (0.7) injuries per 1000 hours, p = 0.02). The risk of suffering a knee overuse injury was significantly higher regardless of whether the player (relative risk 4.8, 95% confidence interval 2.0 to 11.2) or the knee (relative risk 7.9, 95% confidence interval 3.4 to 18.5) was used as the unit of analysis. No interactive effects of age or any other anthropometric data were seen.
The risk of new knee injury, especially overuse injury, was significantly increased on return to elite football after ACL injury regardless of whether the player or the knee was used as the unit of analysis.
前交叉韧带（ACL）损伤对足球运动员来说是严重事件，但ACL损伤后重返足球运动时膝关节损伤率是否更高尚不清楚。
研究有ACL损伤史的精英足球运动员与无ACL损伤史的运动员相比，膝关节损伤的风险。
对2001年瑞典男子职业联赛（310名球员）进行研究。确定研究开始时具有ACL损伤史的球员。前瞻性记录赛季中接触足球的情况和所有导致失能的损伤。
24名球员（8%）在27个膝关节中有28次ACL损伤史（1次再次断裂）。这些球员发生任何类型新膝关节损伤的发生率高于无ACL损伤的球员（每1000小时平均（标准差）损伤次数为4.2（3.7）比1.0（0.7），p = 0.02）。无论将球员（相对风险4.8，95%置信区间2.0至11.2）还是膝关节（相对风险7.9，95%置信区间3.4至18.5）作为分析单位，发生膝关节过度使用损伤的风险均显著更高。未发现年龄或任何其他人体测量数据的交互作用。
ACL损伤后重返精英足球运动时，新膝关节损伤尤其是过度使用损伤的风险显著增加，无论将球员还是膝关节作为分析单位。
