Table 2.

Cox proportional hazard parameter estimates and assigned score for the risk of NACE

Variables	β-estimate	HR (95% CI)	P value	Score
Age, years	0.044	1.05 (1.02 to 1.07)	0.001
Elderly (age ≥80 years)	0.706	2.03 (1.37 to 3.00)	<0.001	2
Female	0.488	1.63 (1.08 to 2.46)	0.020	2
Combination with antiplatelet agents	0.392	1.48 (1.00 to 2.18)	0.047	1
BMI, kg/m2	−0.068	0.93 (0.88 to 0.99)	0.020
<18.5	1.062	2.89 (1.43 to 5.83)	0.003	3
≥18.5, <25	Ref	Ref	Ref
≥25	−0.083	0.92 (0.61 to 1.38)	0.690
Systolic BP, mm Hg	−0.013	0.99 (0.98 to 1.00)	0.042
<90	1.540	4.66 (1.71 to 12.7)	0.003	4
≥90, <140	Ref	Ref	Ref
≥140	−0.043	0.96 (0.58 to 1.58)	0.865
Diastolic BP, mm Hg	−0.010	0.99 (0.97 to 1.01)	0.227
<60	0.191	1.21 (0.73 to 2.02)	0.465
≥60, <90	Ref	Ref	Ref
≥90	−0.497	0.61 (0.22 to 1.66)	0.332
Type of atrial fibrillation
Paroxysmal	Ref	Ref	Ref
Persistent	−0.035	0.97 (0.52 to 1.79)	0.912
Permanent	0.469	1.60 (1.07 to 2.40)	0.023	2
No alcohol consumption	0.500	1.65 (1.04 to 2.62)	0.035	2
Diabetes mellitus	0.416	1.52 (1.04 to 2.22)	0.032	2
Heart failure	0.556	1.74 (1.19 to 2.55)	0.004	2
Prior stent implantation	0.226	1.25 (0.84 to 1.88)	0.273
Prior CABG	−0.632	0.53 (0.25 to 1.14)	0.106
Creatinine clearance	−0.018	0.98 (0.97 to 0.99)	<0.001
≥50	Ref	Ref	Ref
≥30, <50	0.612	1.84 (1.23 to 2.78)	0.003	2
<30	1.150	3.16 (1.67 to 5.96)	<0.001	3

BMI, body mass index; BP, blood pressure; CABG, coronary artery bypass grafting; NACE, net adverse clinical event.