A Systematic Review and Meta-Analysis of Risk Factors Associated with Severity and Death in COVID-19 Patients

Table 1

Characteristics and qualities of studies included in the meta-analysis.

PMID	Author	Year	Country	Ethnicity	Sample size	Mean age (year)	Male (%)	Type	NOS or AHQR
32217556	Chen T	2020	China	Chinese	274	62	62.4	Retrospective cohort	7
32217650	Guan WJ	2020	China	Chinese	1590	48.9 ± 16.3	56.8	Retrospective cohort	8
32269088	Du RH	2020	China	Chinese	179	57.6 ± 13.7	54.2	Retrospective cohort	8
32188484	Shi Y	2020	China	Chinese	487	46	53.2	Retrospective cohort	7
32294485	Li XC	2020	China	Chinese	548	60	50.9	Ambispective cohort	8
32304745	Zhang JX	2020	China	Chinese	663	55.6	48.4	Retrospective cohort	7
31986264	Huang CL	2020	China	Chinese	41	49	73.2	Retrospective cohort	7
32031570	Wang DW	2020	China	Chinese	138	56	54.3	Retrospective cohort	7
32105632	Yang XB	2020	China	Chinese	52	59.7	67.3	Retrospective cohort	7
32109013	Guan WJ	2020	China	Chinese	1099	47	58.1	Retrospective cohort	8
32167524	Wu CM	2020	China	Chinese	201	51	63.4	Retrospective cohort	7
32171076	Zhou F	2020	China	Chinese	191	56	62.3	Retrospective cohort	8
32191764	Yuan ML	2020	China	Chinese	27	56	44.4	Retrospective	7
32173725	Mo PZ	2020	China	Chinese	155	54	55.5	Retrospective	7
32176772	Wang ZL	2020	China	Chinese	69	42	46.4	Retrospective	7
32409504	Shi Q	2020	China	Chinese	306	65/64	49%	Retrospective	8
32564693	Iaccarino G	2020	Italy	Italian	1591	66.5 ± 0.4	64%	Cross-sectional	8

NOS: Newcastle–Ottawa Scale; AHQR: Agency for Healthcare Research and Quality.