Preoperative SARS-CoV-2 Infection Screening before Thoracic Surgery during COVID-19 Pandemic: A Multicenter Retrospective Study

Table 3

Results of screening with anamnestic questionnaire, combined anamnestic questionnaire, and SARS-CoV-2 RT-PCR, combined anamnestic questionnaire and chest CT.

	Preoperative COVID-19 screening
	Anamnestic questionnaire	SARS-CoV-2 RT-PCR	Chest CT scan	Combined anamnestic questionnaire and SARS-CoV-2 RT-PCR	Combined anamnestic questionnaire and chest CT scan
Positive screening result	3/275	4/77	3/78	6/77	3/78
No./total no. % (95% CI)^#	1.1% (0–2.5)	5.2% (1.3–11.7)	3.8% (0–9)	7.8% (2.6–14.3)	3.8% (0–9)

Abbreviations: CI, confidence interval; CT, computed tomography; RT-PCR, reverse transcriptase polymerase chain reaction. A positive chest CT result was defined as Unifocal or multifocal ground-glass opacities were considered as suspicious or positive for COVID-19. # A 95% confidence interval was calculated based on 1000 bootstrap samples.