China
Descriptive (Case report/series)
Medical records
1775
Patients infected with SARS-CoV-2 in Wuhan Jinyintan Hospital. Controls (Wuhan Area) N=3694
none
Total
1 Day
COVID-19 (any condition)
Patient characteristics
ABO blood group
Persons with other than A blood group
1105
3611
A blood group
670
1858
Odds ratio
1.280 (1.140-1.440)
No
Yes
random effects model
Average