Table 4.

Variables associated with the evolution of spontaneous reperfusion

	Odds ratio	95% CI
A. Logistic model without previous medications
Age (for 1 year increment)	1.02	1.00 to 1.04
Preinfarction angina (<48 h)	1.80	0.95 to 3.22
Hypertension	1.50	0.94 to 2.38
Q wave myocardial infarction	0.32	0.20 to 0.51
Heart failure on admission (Killip class >1)	0.33	0.12 to 0.73
B. Logistic model with previous medications
Age (for 1 year increment)	1.02	1.00 to 1.04
Preinfarction angina (<48 h)	1.76	0.92 to 3.19
Hypertension	1.53	0.89 to 2.58
Q wave myocardial infarction	0.34	0.21 to 0.53
Heart failure on admission (Killip class >1)	0.31	0.11 to 0.69
Previous medications
Aspirin	1.50	0.84 to 2.61
ACE inhibitors	1.60	0.76 to 3.17
Nitrates	0.31	0.13 to 0.64