Table 1.

Characteristics and outcomes of the undiagnosed COVID-19 surgical patients

References	Country	Number of patients	Average age	Type of surgery	Perioperative complications	Postoperative fatality	Comments
Aminian A et al. [14]	Iran	3	70	Cholecystectomy, Hernia Repair, Hysterectomy	Fever Pulmonary complications (ARDS) Diarrhea Acute cardiac injury Multiple organ failure	2/3 66.6%	An additional patient died one day before planned surgery
Qin et al. [15]	China	1	37	Liver transplantation	Fever Pulmonary complications	0/1 0%	Fever first elevated after hepatic arterial chemoembolization
Li et al. [16]	China	13	60.2	Thoracic Surgery (lung or esophagus)	Fever Pulmonary complications Diarrhea Muscular soreness	5/13 38.5%	Severe disease in 7 patients
Lei et al. [17]	China	34	55	All elective surgeries	Fever Pulmonary complications (ARDS) Myalgia, Arthralgia Dizziness, Headache, Nausea, Diarrhea Secondary infection Acute cardiac injury Acute kidney injury	7/34 20.6%	44.1% intensive care unit admission rate

Acute Respiratory Distress Syndrome (ARDS)