Study	Reason for exclusion
Ai 2020a	Insufficient data for 2x2 table
Chen 2020a	Insufficient data for 2x2 table
Chen 2020b	Insufficient data for 2x2 table + target condition not clear
Cheng 2020	Insufficient data for 2x2 table
Giamarellos 2020	Insufficient data for 2x2 table
Han 2020	Insufficient data for 2x2 table
Kurstjens 2020	Insufficient data for 2x2 table
Li 2020a	Insufficient data for 2x2 table + Hospital discharge versus no discharge
Li 2020b	Insufficient data for 2x2 table + Mechanical ventilation versus no mechanical ventilation
Li 2020c	Insufficient data for 2x2 table + RNA positive versus RNA negative
Ling 2020	Insufficient data for 2x2 table
Meng 2020	Insufficient data for 2x2 table
Peng 2020	Insufficient data for 2x2 table
Peng 2020a	Insufficient data for 2x2 table
Shi 2020	Insufficient data for 2x2 table
Song 2020	Insufficient data for 2x2 table
Spiezia 2020	Insufficient data for 2x2 table
Sun 2020	Insufficient data for 2x2 table
Tang 2020	Insufficient data for 2x2 table
Wang 2020	Insufficient data for 2x2 table + diagnostic prediction model
Wu 2020	Insufficient data for 2x2 table + diagnostic artificial intelligence model
Xu 2020	Insufficient data for 2x2 table
Yang 2020a	Insufficient data for 2x2 table
Yin 2020	Insufficient data for 2x2 table