TY  - JOUR
PY  - 2013//
TI  - Cognitive ability and educational level in relation to concussion: a population study of young men
JO  - BMJ open
A1  - Teasdale, Thomas William
A1  - Frøsig, Anna Julie
SP  - 12
EP  - 002321
VL  - 3
IS  - 3
N2  - OBJECTIVES: To investigate the association of concussion with cognitive ability (CA) and educational level (EL). DESIGN: Epidemiological-cross-linkage of national computer registers. SETTING: Denmark. PARTICIPANTS: 130 420 young men appearing before the Danish draft board during the period 2006-2010. PRIMARY AND SECONDARY OUTCOME MEASURES: CA test scores, EL and occurrence of concussion during the period 2004-2009, treated either in an A&E unit or upon admission to a hospital ward. RESULTS: The 3067 men who had suffered a concussion had lower CAs (mean=96.5, SD=15, 95% CI 95.0 to 97.0) than the total cohort and they were lower for 1452 who were admitted to a hospital ward (mean CA=95.8, SD=15, 95% CI 95.1 to 96.6) than for 1615 who were treated only at an A&E unit (mean CA=97.1, SD=15, 95% CI 96.3 to 98.0). Multiple logistic regressions revealed that the effects for EL were stronger than those for CA. Among 127 353 men not sustaining a concussion, 48% attended a 'gymnasium' (sixth-form college), among men treated for a concussion at an A&E unit, this falls to 36% and among men hospitalised for a concussion to 30%. Transfer to a gymnasium, if it happens, almost invariably does so before the 18th birthday. Among 701 men suffering a concussion and admitted to a hospital department after this date, only 26% (n=182) were previously transferred to a gymnasium. Among the 804 men treated at an A&E unit after their 18th birthday, 33% (n=265) had done so. These two percentages are significantly below the corresponding non-concussed population (48%). CONCLUSIONS: Taken together, the results suggest that lower CA and, in particular, lower EL are risk factors for sustaining a concussion, the risk increasing with the severity of the injury.<p />  <p>Language: en</p>
LA  - en
SN  - 2044-6055
UR  - http://dx.doi.org/10.1136/bmjopen-2012-002321
ID  - ref1
ER  -