Table 6. Mortality and pulmonary complications among patients with peri-operative SARS-CoV-2 infection.

No.	Authors (Year of publication)	Study design	Country	Diagnoses	Number of patients	Number of confirmed* pre-operative SARS-CoV-2 infections	30-day mortality	Incidence of pulmonary complications**
1.	Nepogodiev et al (2020a)	Cohort study	International (24 countries, 235 hospitals)	Any (i.e., not specific for breast- or colorectal cancer)	Total = 1,128 n = 280 (Elective surgery) n = 835 (Emergency surgery)	n = 294	n = 268 (23.8%)	n = 577 (51.2%)

*Pre-operative SARS-CoV-2 infection confirmed by: Laboratory-, radiologic or clinical diagnosis

** Pulmonary complications defined as: Pneumonia, Acute Respiratory Distress Syndrome (ARDS) or unexpected postoperative ventilation