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J Athl Train. 2014 Jul-Aug;49(4):486-92. doi: 10.4085/1062-6050-49.3.30. Epub 2014 May 28.

Washington State's Lystedt law in concussion documentation in Seattle public high schools.

Author information

1
Orthopedics and Sports Medicine, Seattle Children's Hospital, WA.

Abstract

CONTEXT:

The Lystedt law requires high school athletes who have sustained a concussion to be removed from practice and play and not to be allowed to return until cleared by a medical professional.

OBJECTIVE:

To determine the effect of the Lystedt law on injury and concussion documentation in the Seattle public high schools.

DESIGN:

Cross-sectional study.

SETTING:

Seattle public high schools.

PATIENTS OR OTHER PARTICIPANTS:

The numbers of students, aged 13 to 19 years in the 2008-2009, 2009-2010, and 2010-2011 school years, were 4348, 4925, and 4806, respectively.

MAIN OUTCOME MEASURE(S):

All injuries documented in SportsWare by athletic trainers in Seattle public high schools. We evaluated all injuries, including concussions recorded during the 2008-2009 school year, before the Lystedt law, and during the 2 school years after the law took effect (2009-2010 and 2010-2011). Incidence rates before and after the law were estimated and compared.

RESULTS:

The concussion rate was -1.09% in 2008-2009, 2.26% in 2009-2010, and 2.26% in 2010-2011. A comparison of relative risks showed that the incidence rates of concussions were different before and 1 year after the Lystedt law (relative risk = 2.10; 95% confidence interval [CI] = 1.50, 2.93) and 2 years after the law (relative risk = 2.10; 95% CI = 1.49, 2.93). Overall, the mean number of days out of play after 2008-2009 was almost 7 days greater after the law took effect (difference = 6.9 days; 95% CI = 0.70, 13.1). For females, the mean number of days out of play after 2008-2009 was more than 17 days in 2009-2010 (difference = 17.2 days; 95% CI = 4.81, 29.5) and was more than 6 days in 2010-2011 (difference = 6.3 days; 95% CI = 1.62, 11.0).

CONCLUSIONS:

The number of documented concussions more than doubled after the institution of the Lystedt law, which may be attributed to heightened awareness and closer monitoring.

KEYWORDS:

adolescents; concussion incidence; sports injuries

PMID:
24870293
PMCID:
PMC4151837
DOI:
10.4085/1062-6050-49.3.30
[Indexed for MEDLINE]
Free PMC Article

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