Time from previous SARS-CoV-2 positive swab
30-day postoperative outcomes	Previous SARS-CoV-2 positive swab N = 122	1 to 2 weeks N = 27	2 to 4 weeks N = 60	> 4 weeks N = 35
Pulmonary complications	9·8%(5·2%-16·6%)12/122	18·5% (6·3%-38·1%)5/27	11·7% (4·8%-22·6%)7/60	0·0%(0·0%-10·0%)0/35
Mortality	3·4%(0·9%-8·4%)4/119	7·7% (0·9%-25·1%)2/26	3·4% (0·4%-11·7%)2/59	0·0%(0·0%-10·3%)0/34

Previous positive swab is defined as a confirmed SARS-CoV-2 infection by nasopharyngeal swab (qRT-PcR) greater than one week before the day of surgery. Postoperative pulmonary complications were defined as pneumonia, acute respiratory distress syndrome or unexpected ventilation. Outcomes were defined up to 30 days from the day of surgery with Day 0 as the day of surgery. Full definitions are available in the Appendix.