Table 4:

Risk factors for reoperations.

Variable	Hazard Ratio	95% Confidence Interval	p-value
<40 vs 40–59	1.35	0.80–2.28	0.26
<40 vs 60–74	4.07	2.14–7.73	<.0001
<40 vs ≥75	11.6	2.59–51.65	0.001
40–59 vs 60–74	3.01	1.85–4.89	<.0001
40–59 vs ≥75	8.55	2.04–35.88	0.003
60–74 vs ≥75	2.84	0.66–12.16	0.16
BAV	2.03	1.30–3.16	0.002
Female Gender	0.75	0.48–1.18	0.21
Hypertension	0.93	0.62–1.41	0.74
Dialysis	3.51	0.46–26.6	0.22
Aortic Insufficiency*	0.80	0.51–1.26	0.34
Root Aneurysm*	1.18	0.69–2.01	0.55
Acute Type A Aortic Dissection*	0.69	0.27–1.77	0.44

^*:Reference group: Aortic Stenosis

Abbreviations: BAV: bicuspid aortic valve