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

Table 1 The baseline details of studies included in our meta-analysis considering the groups with raised and normal values of troponin I

Ref.	Country	Population	Mean age	Male/female	Cutoff for TnI raising
Arcari et al[17]	Italy	Normal TnI: 39	66 ± 17	28/11	14 pg/mL
		Raised TnI: 64	79 ± 13	19/45
Fan et al[18]	China	Normal TnI: 67	58 ± 15	38/29	0.01 μg/L
		Raised TnI: 22	71 ± 12	11/11
Guo et al[19]	China	Normal TnI: 135	53 ± 13	57/78	99th percentile
		Raised TnI: 52	71 ± 9	34/18
Lala et al[20]	United States	Normal TnI: 2206	66 ± 13	1312/894318/212	0.09 ng/mL
		Raised TnI: 530	68 ± 15
Lombardi et al[21]	Italy	Normal TnI: 336	64 ± 13	234/102201/77	99th percentile
		Raised TnI: 278	71 ± 12
Lorente-Ros et al[22]	Spain	Normal TnI: 560	63 ± 12	367/193	14 ng/L
		Raised TnI: 147	78 ± 14	77/70
Raad et al[23]	United States	Normal TnI: 630	59 ± 11	280/350	18 ng/L
		Raised TnI: 390	70 ± 13	229/161
Karbalai Saleh et al[24]	Iran	Normal TnI: 271	57 ± 15	167/104	99th percentile
		Raised TnI: 115	65 ± 15	69/46
Shah et al[25]	United States	Raised TnI: 116	59 ± 14	70/123	0.05 ng/ml
		Normal TnI: 193	68 ± 14	62/54
Singh et al[26]	United States	Normal TnI: 129	53 ± 11	54/75	17 ng/L
		Raised TnI: 132	71 ± 12	70/62