Table 4.

Multivariate analysis of risk factors associated with invasive mechanical ventilation in patients with SARS-CoV-2 pneumonia.

Factors	OR (95% CI)	p value
Age, years
<50	1 (ref)	≤0.001
50–65	2.05 (1.03–4.10)	0.04
>65	5.25 (2.66–10.36)	≤0.001
Male sex	2.36 (1.40–3.97)	0.001
SpO2 <90%	0.38 (0.23–0.63)	≤0.001
White blood cell count, ×10 9 /L
<4	1 (ref)	≤0.001
4 to 10	1.77 (0.47–6.64)	0.40
>10	5.73 (1.46–22.46)	0.01