Table 1.

Characteristics of included studies.

Author	Design	Samples	Cut-off (g/L)	Age (years)	Male (%)	Outcome	HT (%)	DM (%)	CKD (%)	Liver Disease (%)	Malignancy (%)	NOS
Bassoli et al., 2021 [15]	Retrospective Cohort	207	30	61	68.6	Severity	34.3	13.1	NA	NA	NA	7
Chen (1) et al., 2020 [16]	Retrospective Cohort	274	32	62	62	Death	34	17	1	4	3	8
Liu et al., 2020 [17]	Retrospective Cohort	12	40	59	67	Severity	25	16.7	16.7	0	0	7
Chen (2) et al., 2020 [18]	Retrospective Cohort	21	32	56	81	Severity	23.1	14.1	NA	NA	NA	7
Deng et al., 2020 [19]	Retrospective Cohort	65	40	35	55	Severity	4.6	3.1	NA	NA	1.53	8
Gao et al., 2020 [20]	Retrospective Cohort	210	30	71	48	Death	55	18	9	9	3	8
Hirashima et al., 2020 [21]	Retrospective Cohort	8	32	65	87.5	Severity	62.5	62.5	NA	NA	NA	7
Hu et al., 2020 [22]	Retrospective Cohort	40	35	51	60	Severity	32.5	15	NA	NA	2.5	8
Huang et al., 2020 [23]	Retrospective Cohort	299	35	53	53	Severity & Death	24.7	11.7	NA	NA	3	7
Hundt et al., 2020 [8]	Retrospective Cohort	1827	35	65	53	Severity	NA	39	NA	NA	NA	8
Lei et al., 2020 [24]	Retrospective Cohort	115	35	66	50	Severity	NA	NA	NA	NA	NA	8
Li et al., 2020 [25]	Retrospective Cohort	523	35	54	48	Severity & Death	25.	18	NA	NA	NA	8
Ma et al., 2020 [26]	Retrospective Cohort	523	30	44	55.26	Severity & Death	15.9	9.1	1.63	NA	3.04	8
Nakamura et al., 2020 [27]	Retrospective Cohort	32	30	75	69	Death	41	22	NA	NA	100	7
Pan et al., 2020 [28]	Retrospective Cohort	124	28.2	68	68.5	Death	50	20.2	NA	NA	NA	8
Shi et al., 2020 [29]	Retrospective Cohort	87	33	60	56.3	Severity	NA	NA	1.8	NA	2.3	7
Wang et al., 2020 [30]	Retrospective Cohort	275	45	49	46.5	Severity	19.6	6.2	1.5	2.2	0.7	7
Yu et al., 2020 [31]	Retrospective Cohort	1443	35	64	50.4	Severity	20.9	14.7	1.9	2.3	1.1	7
Zhang et al., 2020 [9]	Retrospective Cohort	115	40	50	42.6	Severity	NA	NA	NA	0	NA	7