Table 3.

Adverse Warfarin-related Events in Intervention and Control Nursing Homes

	Intervention nursing homes	Control nursing homes	Rate Ratio	Adjusted Rate Ratio (95% CI)
Peventable adverse warfarin related event	41	42	0.95	0.87 (0.54, 1.4)
Preventable serious, life-threatening or fatal warfarin-related event	7	11	0.62	0.50 (0.17, 1.5)
Potential adverse warfarin-related event	82	101	0.79	0.77 (0.45, 1.3)

^*Adjusted for nursing home, abstractor, and resident’s age, sex, race, and Charlson comorbidity score