TABLE 2.

Major bleeding incidence and Cox proportional-hazards regression analysis of risk levels stratified by the ABC-bleeding and the modified HAS-BLED scores.

	ABC-bleeding score risk level			Modified HAS-BLED score risk level
	Low	Medium	High	Low	Medium	High
N (%)	1,507	1,084	301	1,717	874	301
No. of events	15	18	15	15	23	10
Incidence (per 100 person-years)	0.31	0.51	1.49	0.27	0.78	0.97
HR (95% CI)*	−	1.83 (0.91–3.69)	4.92 (2.34–10.30)	–	2.58 (1.32–5.05)	3.70 (1.67–8.30)
P-value	−	0.09	<0.001	−	0.005	0.001

CI, confidence interval; HR, hazard ratio.

*HR vs. the low-risk group.