Table 2.

One-year risk of death on aspirin (n = 13,049) and no aspirin (n = 10,963) in elderly patients taking ACE inhibitors for heart failure [6]

	Adjusted RR (95% CI)
All patients (n = 24,012)	0.94 (0.89–0.99)
Patients on ACE inhibitors (53%)	0.94 (0.87–1.01)
		ns*
Patients without ACE inhibitors (47%)	0.93 (0.87–1.00)

* p for interaction for ACE inhibitors or no ACE inhibitors; RR relative risk; CI confidence intervals; ns not significant