Table 3.

Risk factors

	≤65 years		>65 years		p
	n	%	n	%
Risk factors
Overall
No	13,471	78.26	4970	67.55	<0.001
Yes	3743	21.74	2387	32.45
Aortic aneurysm
No	17,196	99.90	7313	99.40	<0.001
Yes	18	0.10	44	0.60
Antiplatelet medication
No	16,732	97.20	6402	87.02
Yes	482	2.80	955	12.98	<0.001
COPD
No	16,524	95.99	6784	92.21
Yes	690	4.01	573	7.79	<0.001
Corticoids
No	17,104	99.36	7270	98.82
Yes	110	0.64	87	1.18	<0.001
Diabetes
No	16,752	97.32	6821	92.71
Yes	462	2.68	536	7.29	<0.001
Coagulopathy
No	17,098	99.33	7207	97.96
Yes	116	0.67	150	2.04	<0.001
Immunosuppression
No	17,135	99.54	7303	99.27
Yes	79	0.46	54	0.73	0.010
Anticoagulation therapy
No	17,140	99.57	7077	96.19
Yes	74	0.43	280	3.81	<0.001
Smoking
No	14,836	86.19	6988	94.98
Yes	2378	13.81	369	5.02	<0.001