Table 2.

Publications on EQA results for SARS-CoV-2 genome detection categorised according to epidemiological relevance of criteria 1–22

	Relevant										Conditionally or imperceptibly relevant											Not assigned	Total (n)*
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22
Peer reviewed
Asai at al (2022)27	x	x	x	x	x	x	..	..	..	x	..	..	..	..	..	..	x	x	x	x	x	x	7
Buchta et al (2020)28	x	x	..	..	x	x	x	x	..	x†	x	..	x	..	..	..	x	x	x	x	x	x	7
Buchta et al (2021)29	x	x	..	x	x	x	x	x	..	x	x	x	..	..	..	x	x	x	x	x	x	x	8
Buchta et al (2021)30	x	x	..	x	x	x	x	x	x	x†	x	..	x	..	..	x	x	x	x	x	x	x	9
Buchta et al (2022)31	x	x	..	x	x	x	x	x	..	x	x	..	x	x	x	x	x	x	x	x	x	x	8
Edson et al (2020)32	x	x	x	x	x	x	..	..	x	x	x	..	..	..	..	..	x	x	x	x	..	..	8
Fischer et al (2020)33	x	x	x	x	x	x	..	..	..	x	..	..	..	..	..	..	x	x	x	..	..	..	7
Görzer et al (2020)34	x	x	..	x	x	x	..	..	..	x†	..	..	..	..	..	..	x	..	x	x	x	x	6
Guo et al (2022)35	x	x	..	x	x	x	x	x	..	x	..	..	..	..	..	..	x	..	..	x	x	x	8
Ishii et al (2020)36	x	x	x	x	x	x	x	x	..	x	..	..	..	..	..	..	x	..	x	x	..	x	9
Kaur et al (2022)37	x‡	x	x	x	x	x	..	..	..	x†	..	..	..	..	..	x	x	x	..	..	..	x	7
Lau et al (2022)38	x	x	x	x	x	x	..	..	..	x	..	..	..	..	..	..	x	..	..	x	x	x	7
Li et al (2022)39	x	x	x	..	x	x	..	..	..	x	..	..	..	..	..	..	x	..	x	x	..	..	6
Matheeussen et al (2020)40	x	x	..	x	x	x	..	..	..	x	x	x	..	..	..	..	x	..	..	x	..	x	6
Park et al (2022)41	x	x	x	x	x	x	x	..	..	x†	..	..	x	..	..	x	x	x	x	x	x	x	8
Sung et al (2020)42	x	x	x	x	x	x	x	x	..	x	x	..	..	..	..	..	x	..	x	x	x	x	9
Wang et al (2021)43	x	x	..	..	x	x	x	..	..	x	x	..	..	..	..	..	x	..	..	x	..	x	6
Published by the EQA provider
Zeichhardt et al (2020)44	x	x	..	x	x	x	x	x	..	x	x	x	..	..	..	..	x	..	x	x	..	x	8
Total (n)§	17	17	9	14	17	17	9	7	2	17	8	2	4	1	1	5	17	9	12	15	10	14

Cross indicates criteria is present in publication. EQA=external quality assessment.

^*Publications reporting information categorised as relevant.

^†Concentration of pathogen not specified in common units.

^‡Only in-house assays were used.

^§Peer-reviewed publications.