Study	Reason for exclusion
Ahava 2021	Ineligible index test (lab‐based antigen assay)
Aoki 2020	Ineligible index test (lab‐based antigen assay)
Bello‐Chavolla 2021	Ineligible index test (multiple assays used)
Chen 2021	Ineligible study design (proof of concept)
Corman 2020	Ineligible study design (analytical accuracy)
Cubas‐Atienzar 2021	Ineligible study design (analytical accuracy)
Dalal 2021	Ineligible study design
Diao 2020	Exclude on index test ‐ not commercially available
Dohla 2020	Ineligible index test
Downs 2021	Ineligible study design (multiple samples per participant; only gives overall positivity rates)
Eshghifar 2021	Inadequate sample size (also analytical accuracy)
Frnda 2021	Accuracy data cannot be extracted
Gili 2021	Ineligible index test (lab‐based antigen assay)
Haage 2021a	Ineligible population
Haage 2021b	Ineligible study design
Herrera 2020	Ineligible reference standard
Hingrat 2020	Ineligible index test (lab‐based antigen assay)
Hirotsu 2020	Ineligible index test
Hirotsu 2021	Ineligible index test (lab‐based antigen assay)
Hledik 2020	Accuracy data cannot be extracted
Hoehl 2020	Ineligible study design
Kannian 2021	Ineligible population (cases PCR positive on NP and saliva; controls PCR negative on saliva but half positive on NP swabs)
Kashiwagi 2020	Inadequate sample size
Kobayashi 2021	Ineligible index test (lab‐based antigen assay)
Koskinen 2021	Ineligible index test (lab‐based antigen assay)
Kotsiou 2021	Accuracy data cannot be extracted (PPV only)
Kurstjens 2020	Ineligible index test
Kyosei 2020	Ineligible study design
Lefever 2021	Ineligible index test (laboratory‐based assay)
Le Hingrat 2020	Ineligible index test
Li 2021	Inelligible index test (in‐house microfluidic assay)
Liu 2021	Ineligible index test (in‐house CLIA)
Mahari 2020	Ineligible study design
Mak 2020a	Ineligible study design (deliberate sampling by Ct values; analytical accuracy)
Mak 2020b	Ineligible study design (deliberate sampling by Ct values; analytical accuracy)
Marzinotto 2020	Accuracy data cannot be extracted
Mboumba 2021	Ineligible study design (analytical accuracy)
McAulay 2020	Ineligible index test (uses serum samples)
McDonald 2020	Ineligible reference standard
Menchinelli 2021	Ineligible index test (lab‐based antigen assay)
Mohamed 2021	Ineligible study design
Moreno 2021	Accuracy data cannot be extracted
Nachtigall 2020	Ineligible index test
Ogawa 2020	Inadequate sample size
Pavelka 2020	Ineligible study design
Pekosz 2021	Ineligible reference standard (also reports subgroup of Young 2020 )
Pellanda 2020	Ineligible index test
Peng 2020	Ineligible study design
Perchetti 2020	Ineligible study design
Pollock 2020a	Ineligible index test
Rastawicki 2021	Ineligible study design (serial testing in hospitalised patients)
Regev‐Yochay 2021	Ineligible index test (multiple assays used)
Ren 2021	Ineligible index test (lab‐based antigen assay)
Rodriguez‐Manzano 2020	Ineligible index test
Rusanen 2020	Ineligible index test (lab‐based antigen assay)
Scheiblauer 2021	Ineligible study design (analytical accuracy only)
Seitz 2021	Accuracy data cannot be extracted (confused reporting)
Seo 2020	Accuracy data cannot be extracted
Singh 2020a	Ineligible index test
Singh 2020b	Ineligible index test
Wang 2020	Ineligible index test (amplification‐free nucleic acid immunoassay)
Wu 2020	Ineligible index test
Yamamoto 2021	Ineligible population (all COVID‐19 inpatients; specificity in previously positive patients)
Yamayoshi 2020	Ineligible study design (analytical accuracy only)
Yokota 2021	Ineligible index test (lab‐based antigen assay)
Yu 2020	Ineligible index test
Zamecnik 2020	Ineligible index test
Zeng 2020	Ineligible study design
Zhang 2020	Ineligible index test