Table 1. Summary of rRT-PCR test producing inconclusive results from 11 COVID-19 patients

Ann Clin Microbiol 2020;23:191-199. Causes and Clinical Relevance of Inconclusive SARS-CoV-2 Real-Time Reverse TranscriptionPCR Test Results

Table 1. Summary of rRT-PCR test producing inconclusive results from 11 COVID-19 patients

Patient	Anti-COVID-19 treatment	Days from diagnosis to		Ct values of the initial inconclusive result			Days and number of consecutive test results from initial inconclusive results to negative conversion
Patient	Anti-COVID-19 treatment	Admission	Initial inconclusive result	E	RdRp	N	Days	Pos	Inc	Neg
1	N/A	0	9	N/D	35.35	36.5	21	10	5	3
2	Lopinavir/ritonavir	6	6	35.4	35.28	N/D	11	2	5	8
3	N/A	0	21	N/D	N/D	38.77	11	3	3	1
4	ECMO, steroid	6	15	32.99	N/D	37.74	10	6	6	6
5	Lopinavir/ritonavir, Camostat mesylate, HCQ	2	12	35.71	N/D	N/D	4	0	3	2
6	Camostat mesylate	0	15	N/D	38.7	37.35	5	1	2	2
7	HCQ	0	5	33.65	N/D	34.56	N/A*	N/A*	N/A*	N/A*
8	N/A	68	76	N/D	N/D	38.69	2	0	0	1
9	Plasma treatment	0	14	37.12	38.22	N/D	3	3	0	2
10	Lopinavir/ritonavir, HCQ, plasma treatment	1	10	N/D	38.95	N/D	5	3	0	6
11	N/A	0	0†	N/D	N/D	36.91	N/A†	N/A†	N/A†	N/A†

*Drop out because transferred to another hospital before negative conversion.
†Diagnosis was made in retesting on same day and there was no further test owing to admission to another hospital.
Abbreviations: rRT-PCR, real-time reverse transcription-polymerase chain reaction; COVID-19, coronavirus disease 2019; Ct, threshold cycle; RdRp, RNA-dependent RNA polymerase gene; E, envelope gene; N, nucleocapsid gene; N/A, not applicable/available; ND, not detected; Pos, positive test; Inc, inconclusive test; Neg, negative test; ECMO, extracorporeal membrane oxygenation; HCQ, hydroxychloroquine.