Table 1.

Sample Characteristics at Study Enrollment (n = 238)

Age (M ± SD)	40.56 years ± 17.18
Female sex (n, %)	88/238; 37.0%
Hispanic or Latino (n, %)	14, 5.88%
Race (n, %)
Black or African American	116, 48.74%
White or Caucasian	108, 45.38%
Asian	3, 1.26%
Native American	1, 0.42%
Hawaiian or Pacific Islander	2, 0.84%
Multi-racial	5, 2.10%
Unknown or Unreported	3, 1.26%
Glasgow Coma Scale (M ± SD, % <13)	14.78 ± 0.97, 1.3%
Mild (13–15; n, %)	235; 98.74%
Moderate (9–12; n, %)	1; 0.42%
Severe (3–8; n, %)	2; 0.84%
Head injury severity (M ± SD, % moderate or worse)	1.47 ± 0.97, 5.5%
Loss of consciousness (n, %)	140/238, 58.8%

Age, female sex, ethnicity, race, and loss of consciousness were self-reported. Head injury severity measured by the AIS, item #1. AIS > 2 indicates moderate or worse head injury.