Table 5:

Performance of the symptom screening tool (sensitivity analysis)^*

	SARS-CoV-2 positive	SARS-CoV-2 negative	Total
Screening positive	71	1490	1561
Screening negative	6	1808	1814
Total	77	3298	3375
	Point estimates (95% CI)
Apparent prevalence	0.46 (0.45–0.48)
True prevalence	0.02 (0.02–0.03)
Accuracy	0.56 (0.54–0.57)
Sensitivity	0.92 (0.84–0.97)
Specificity	0.55 (0.53–0.56)
Positive predictive value	0.04 (0.04–0.06)
Negative predictive value	0.997 (0.993–0.998)
Positive likelihood ratio	2.04 (1.89–2.20)
Negative likelihood ratio	0.14 (0.07–0.31)
Odds ratio	14.36 (6.22–33.13)

Note: CI = confidence interval, SARS-CoV-2 = severe acute respiratory syndrome coronavirus 2.

^*Assuming asymptomatic prevalence = 0.0035 (6 people with SARS-CoV-2 infection among 1814 without symptoms).