Characteristics of patients with tornado injuries seen in emergency departments based on chart review—Alabama, April 27–30, 2011.

%) of patients.a The ISS was known for 1,170 (83.7b Patients may be counted more than once due to multiple insurance types or diagnoses.c Unknown if FEMA approved tornado storm shelter or safe room or a basement in a private residence.–30.d Direct injuries include those caused by flying debris and structural collapse from the tornado on April 27; indirect injuries occurred nearly exclusively from April 28e Based on transfer information available in hospital records as well as linking patient records between hospitals. Patients with missing unique identifiers (name or date of birth) could not be linked.f Mean score chi-square test or Fisher's exact chi-square test (when sample size g Based on correlation chi-square test