Determining Risk Factors of Bleeding in Patients on Warfarin Treatment

Table 1

Demographic data (age, gender, and education level), concomitant use of acetylsalicylic acid, and INR sampling frequency in 128 patients using warfarin with bleeding-related (SG) and non-bleeding-related (CG) reasons for their emergency department visit.

	CG		SG
		%		%
Gender
Female	33	52.4	38	58.5	0.489
Male	30	47.6	27	41.5
Highest level of education
Unschooled	10	15.9	15	23.1	0.101
Primary school	33	52.4	39	60.0
High school	13	20.6	4	6.2
University	7	11.1	7	10.8
Time between INR checks
Unscheduled	4	6.3	11	16.9	0.483
<30 days	15	23.8	10	15.4
30–90 days	42	66.6	43	66.2
>90 days	2	3.3	1	1.5
Acetylsalicylic acid use
Yes	54	85.7	25	38.5	<0.001
No	9	14.3	40	61.5