Troponin I biomarker as a strong prognostic factor for predicting COVID-19 mortality: A systematic review

Table 2 The outcome of coronavirus disease 2019 considering the groups with raised and normal values of troponin

Ref.	Raised TnI rate	Death rate	ARDS	Kidney injury	ICU admission
Arcari et al[17]	39/103	Raised TnI: 12	---	---	---
		Normal TnI: 7
Fan et al[18]	22/89	---	Raised TnI: 20	Raised TnI: 9	---
			Normal TnI: 12	Normal TnI: 10
Guo et al[19]	52/187	Raised TnI:3 1	Raised TnI: 30	Raised TnI: 14	Raised TnI: 31
		Normal TnI: 12	Normal TnI: 16	Normal TnI: 4	Normal TnI: 14
Lala et al[20]	530/2736	Raised TnI: 223	---	---	---
		Normal TnI: 102
Lombardi et al[21]	278/614	Raised TnI: 102	---	Raised TnI: 41	---
		Normal TnI: 43		Normal TnI: 13
Lorente-Ros et al[22]	147/707	Raised TnI: 60; Normal TnI: 130	---	---	Raised TnI: 7Normal TnI: 5
Raad et al[23]	390/1020	Raised TnI: 128	Raised TnI: 93	Raised TnI: 224	Raised TnI: 105
		Normal TnI: 52	Normal TnI: 64	Normal TnI:178	Normal TnI:93
Karbalai Saleh et al[24]	115/386	Raised TnI: 47	Raised TnI: 46	Raised TnI: 35	Raised TnI: 41
		Normal TnI: 30	Normal TnI: 30	Normal TnI: 25	Normal TnI: 38
Shah et al[25]	116/309	Raised TnI: 44	---	Raised TnI: 13	Raised TnI: 58
		Normal TnI: 22		Normal TnI: 5	Normal TnI: 52
Singh et al[26]	132/276	Raised TnI: 20	Raised TnI: 29	---	Raised TnI: 63
		Normal TnI: 5	Normal TnI: 10		Normal TnI: 25