title: A retrospective cross-sectional study of the prevalence of generalized convulsive status epilepticus in traumatic brain injury: United States 2002-2010.
abstract: OBJECTIVE
  To determine the incidence, predictors, and outcomes of generalized convulsive status epilepticus (GCSE) in traumatic brain injury (TBI) patients.
  
  
  METHODS
  We conducted a retrospective cross-sectional study of adult patients with acute TBI using the 2002-2010 Nationwide Inpatient Sample (NIS) database of USA. We used multivariable logistic regression analyses to identify independent predictors of GCSE in patients with TBI and to determine the impact of GCSE on outcomes (in-hospital mortality, length of stay, total hospital charges, and discharge disposition).
  
  
  RESULTS
  Among 1,457,869 patients hospitalized with TBI, 2315 (0.16%) had GCSE. In-hospital mortality was significantly higher in patients with GCSE (32.5% vs. 9.6%; unadjusted OR 4.54, 95% CI 4.16-4.96; p<0.001; adjusted OR 3.41; 95% CI 3.09-3.76 p<0.001). Patients with GCSE had longer length of stay (17.3 ± 21.9 vs. 6.8 ± 11.1 days; p<0.001), higher total hospital charges ($147,415 ± 162,319 vs. $54,041 ± 90,524; p<0.001), and were less likely to be discharged home (19.8% vs. 52.7%; p<0.001). Using multivariable logistic regression analysis, age >35 years (OR 2.15; 95% CI 1.87-2.47), CNS infections (OR 4.86; 95% CI 3.70-6.38), anoxic brain injury (OR 9.54; 95% CI 8.10-11.22), and acute ischemic stroke (OR 4.09; 95% CI 3.41-4.87) were independent predictors of GCSE in TBI patients. Epilepsy was an independent negative predictor of GCSE (OR 0.74; 95% CI 0.55-0.99).
  
  
  CONCLUSIONS
  Despite its low incidence, GCSE in TBI patients was associated with worse outcomes with threefold higher in-hospital mortality, prolonged hospitalization, higher hospital charges, and worse discharge disposition. Surprisingly, epilepsy is a negative predictor of GCSE in this population.
authors.affiliation: Department of Neurology, Wayne State University/Detroit Medical Center, Detroit, MI, United States. Electronic address: monicadhakar@gmail.com.
authors.forename: Monica B
authors.initials: MB
authors.lastname: Dhakar
authors.affiliation: Department of Neurology, Wayne State University/Detroit Medical Center, Detroit, MI, United States.
authors.forename: Sanjeev
authors.initials: S
authors.lastname: Sivakumar
authors.affiliation: Department of Neurology, Wayne State University/Detroit Medical Center, Detroit, MI, United States.
authors.forename: Pratik
authors.initials: P
authors.lastname: Bhattacharya
authors.affiliation: Department of Neurology, Wayne State University/Detroit Medical Center, Detroit, MI, United States.
authors.forename: Aashit
authors.initials: A
authors.lastname: Shah
authors.affiliation: Department of Neurology, Wayne State University/Detroit Medical Center, Detroit, MI, United States.
authors.forename: Maysaa M
authors.initials: MM
authors.lastname: Basha
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001930:Brain Injuries / Q000175:diagnosis / Q000191:economics / Q000453:epidemiology* / Q000628:therapy; D003430:Cross-Sectional Studies; D005260:Female; D017048:Health Care Costs / Q000706:statistics & numerical data; D017052:Hospital Mortality; D006801:Humans; D015994:Incidence; D007902:Length of Stay / Q000191:economics / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011379:Prognosis; D012189:Retrospective Studies; D013226:Status Epilepticus / Q000175:diagnosis / Q000191:economics / Q000453:epidemiology* / Q000628:therapy; D014481:United States / Q000453:epidemiology; D055815:Young Adult
keywords: Mortality; Outcome; Status epilepticus; Traumatic brain injury