Table 1.

Population characteristics

Variables
Demographic data
Age (years)	60 ± 13
Male gender	39 (78%)
Skin color black/mixed	21 (42%)
Circumstances of care
Non-business hours (5pm-7am)	24 (48%)
Weekends	15 (30%)
Rush hour (7am-9am and 5pm-7pm)	9 (18%)
History of
Diabetes mellitus	14 (28%)
Previous coronary artery disease	6 (12%)
Presentation of infarction
Time of onset of symptoms at arrival	5.0 (1.1 - 6.0)
Anterior infarction	27 (54%)
Magnitude of ST elevation (mm)	3.1 (1.5 - 4.4)
Killip class > 1	6 (12%)
GRACE score	139 (114 - 158)