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 (83.7
b 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 28
e 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 <5) used for overall group and each level compared to all other levels combined, unless stated otherwise.
g Based on correlation chi-square test