Table 1.

Accuracy of negative SARS‐CoV‐2 RT‐PCR results in upper respiratory tract specimens from patients with microbiological diagnosis of Covid‐19 upon β‐glucuronidase gene RT‐PCR C _T value

	SARS‐CoV‐2 RT‐PCR
β‐glucuronidase gene C _T	Positive ^a	Negative ^b
≤31.2	18	18
>31.2	3	8

C _T, RT‐PCR cycle threshold.

^{^a}

The Realquality RQ‐2019‐nCoV was used in seven specimens. The LightMix Modular SARS‐CoV‐2 (COVID‐19) E‐gene/LightMix Modular SARS‐CoV‐2 (COVID‐19) RdRP gene was used in six specimens. The SARS‐CoV‐2 Real‐Time PCR Kit was used in four specimens. The SARS‐CoV‐2 (S gene)–BD Max System (Viasure Real‐Time PCR Detection Kits) was used in four specimens.

^{^b}

The LightMix Modular SARS‐CoV‐2 (COVID‐19) was used in 17 specimens. The Realquality RQ‐2019‐nCoV was used in six specimens. The SARS‐COV‐2 Real‐Time PCR Kit was used in three specimens.