Table 2. Multivariate analysis.

Parameters	P values	Odds ratio (95% CI)
Age categorized (years) *
51–60	0.115	2.35 (0.81–6.82)
61–70	<0.001	7.69 (2.93–20.14)
71–80	<0.001	14.99 (5.88–38.22)
>80	<0.001	36.78 (14.42–93.85)
Gender (male)	<0.001	1.84 (1.31–2.58)
Arterial hypertension†	0.705	0.93 (0.64–1.35)
Diabetes mellitus†	0.251	1.24 (0.86–1.78)
Pulmonary disease†	0.303	1.24 (0.83–1.85)
Cardiovascular disease†	0.945	1.01 (0.68–1.52)
Chronic kidney disease†	0.455	1.31 (0.65–2.64)
Thrombocytopenia†	0.215	1.29 (0.86–1.93)
Prolonged PT	<0.001	2.18 (1.49–3.18)
D-dimer elevated (>2 ULN)	0.003	1.79 (1.22–2.62)
Constant	<0.001	0.01 (0.00–0.03)

*Age ≤50 years was used as the reference category.

†Variable not included in the final model.