Table 3. Complications in COVID-19 patients hospitalized >65 years.

 * Chi-square test was used to calculate statistical significance between the mortality and complications

Complications	65 to 79 years old,  n (%)	P-value (95% CI)*	≥80 years old, n (%)	P-value (95% CI)*
Type 1 respiratory failure (pO2<60mmHg)	142 (73.6%)	0.379	289 (73.5%)	0.2
Type 2 respiratory failure (pO2<60mmHg, pCO2>45mmHg)	14 (7.3%)	0.372	32 (8.1%)	<0.001
Acute kidney failure	68 (35.2%)	0.002	194 (49.4%)	<0.001
Venous thromboembolism	0 (0%)	0	1 (0.3%)	0.283
Arterial embolism	2 (1%)	0.476	0 (0%)	0
Liver dysfunction	26 (13.5%)	0.695	59 (15.1%)	0.005