Table 1. frequency of drug use history (percent) .

-	Intervention	Control	P value
Nitrate	(85) 51	(80) 48	0.47
Beta-blocker	(75) 45	(66.7) 40	0.32
Calcium blocker	(25) 15	(26.7) 16	0.84
ACI	(95) 57	(86.7) 52	0.12
Asprin	(91.7) 55	(90) 54	0.75
Warfarin	(0) 0	(1.7) 1	0.50
Digoxin	(0) 0	(1.7) 1	0.50
Statin	(98.3) 59	(93.3) 56	0.36