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Volume 27, Number 1—January 2021
Dispatch

Prevalence of SARS-CoV-2, Verona, Italy, April–May 2020

Massimo Guerriero1, Zeno Bisoffi1Comments to Author , Albino Poli, Claudio Micheletto, Antonio Conti, and Carlo Pomari
Author affiliations: Istituto di Ricovero e Cura a Carattere Scientifico Ospedale Sacro Cuore Don Calabria, Negrar, Italy (M. Guerriero, Z. Bisoffi, A. Conti, C. Pomari); Università di Verona, Verona, Italy (Z. Bisoffi, A. Poli); Azienda Ospedaliera Universitaria di Verona, Verona (C. Micheletto)

Main Article

Table 2

Latent class analysis of SARS-CoV-2 infection, Verona, Italy, 2020

Factor Probability % (95% CI)
 % (95% CI)
Class 1 (SARS-CoV-2–negative) Class 2 (SARS-CoV-2–positive) Sensitivity Specificity Positive predictive value Negative predictive value
SARS-CoV-2 IgG 1.1 (0.6–2.0) 53.5 (30.8–74.8) 53.5 (51.0–53.0) 98.9 (98.4–99.4) 60.1 (57.6–62.5) 98.6 (98.0–99.2)
SARS-CoV-2 RNA 0.5 (0.2–1.1) 6.1 (1.6–20.9) 6.1 (4.9–5.7) 99.5 (99.1–99.9) 27.4 (25.1–29.6) 97.2 (96.3–98.0)
Anosmia* 0.8 (0.03–1.8) 54.5 (33.2–74.2) 54.5 (52.0–54.1) 99.2 (98.8–99.6) 67.8 (65.5–70.2) 98.6 (98.0–99.2)
Diarrhea* 7.0 (5.7–8.6) 37.2 (21.6–55.9) 37.2 (34.8–35.9) 93.0 (91.7–94.3) 14.1 (12.4–15.9) 98.0 (97.2–98.7)
Fever* 1.3 (0.8–2.2) 45.8 (26.3–66.7) 45.8 (43.3–45.2) 98.7 (98.1–99.3) 52.1 (49.6–54.7) 98.3 (97.7–99.0)
Dyspnea* 2.6 (1.8–3.6) 32.3 (17.9−51.0) 32.3 (29.9–31.5) 97.4 (96.6–98.2) 27.8 (25.5–30.0) 97.9 (97.2–98.6)

*The clinical variables used in the latent class analysis were selected by backward stepwise multinomial logistic regression with a significance level for removal of 0.2.

Main Article

1These authors contributed equally to this article.

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Page updated: December 21, 2020
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