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. Author manuscript; available in PMC: 2013 Jun 24.
Published in final edited form as: Acad Emerg Med. 2012 Apr;19(4):430–438. doi: 10.1111/j.1553-2712.2012.01330.x

Table 1.

Patient sample characteristics by site

Characteristic Site 1 Site 2 Site 3
Number of individual patients 99 31 212
Age, mean (±SD) 35 (±11) 31 (±10) 31 (±10)
Female, n (%) 50 (51) 18 (58) 129 (61)
Black or African American, n (%) 97 (99) 31 (100) 206 (98.6)