Table 2. Primary and secondary outcomes.

	No COVID-19 (n=731)	COVID-19 (n=3039)	Adjusted OR or difference	95% CI	P value
30-day major PPC, n (%)	24 (3.3)	103 (3.9)	0.81	0.64 to 1.03	0.085
Pneumonia	21 (2.8)	92 (3.0)	0.87	0.67 to 0.99	0.270
ARDS	5 (0.7)	30 (1.0)	0.70	0.45 to 1.08	0.106
Unexpected ventilation	3 (0.4)	22 (0.7)	2.33	1.22 to 4.78	0.014
In-hospital PPC, n (%)	18 (2.5)	82 (2.7)	0.92	0.70 to 1.21	0.543
In-hospital LOS (day), median (IQR)	7 (6, 9)	7 (5, 9)	−0.10	−0.54 to 0.33	0.645
Postoperative LOS (day), median (IQR)	5 (4, 6)	4 (3, 6)	−0.02	−0.45 to 0.41	0.926
30-day reoperation, n (%)	6 (0.8)	18 (0.6)	0.67	0.39 to 1.15	0.152
30-day mortality, n (%)	2 (0.27)	1 (0.03)	0.41	0.08 to 1.63	0.234

Values are shown as median (IQR) or number (%).

Adjusted ORs or differences with 95% CIs and P values were estimated using regression models weighted by inverse probability of treatment weighting (IPTW).

ARDS, acute respiratory distress syndrome; LOS, length of stay; PPC, postoperative pulmonary complications.