Table 3.

In-hospital mortality by month of surgery

Month of surgery	All (n = 755)	Covid-19 negative (n = 702)	Covid-19 positive (n = 53)
March 2020
N(%)	27 (3.6)	17 (3.1)	10 (32.3)
Rate per 30 days (95%CI)	0.13 (0.09–0.20)	0.08 (0.05–0.14)	0.67 (0.36–1.25)
April 2020
N(%)	9 (6.0)	6 (4.7)	3 (13.6)
Rate per 30 days (95%CI)	0.18 (0.08–0.37)	0.13 (0.05–0.33)	0.38 (0.12–1.16)
P value	p = 0.528	p = 0.107	p = 0.195