A phenome-wide association study of ABO blood groups

Table 2 Number of significant associations of tag blood group antigens with binary phenotypes by phenotype category

Binary category	Total number	Number significant by blood group antigen
Binary category	Total number	A₁	A₂	B	O
Circulatory	335	10	0	4	13
Endocrine	171	5	0	0	4
Respiratory	179	3	0	1	2
Neoplasms	108	2	0	0	2
Digestive	369	2	0	1	3
Symptoms	176	1	0	0	0
Other categories*	2202	0	0	0	0

*Other categories include neurological, musculoskeletal, gynecologic and obstetric, hematopoietic, dermatologic, genitourinary, neoplasms, mental health, infectious diseases, sense organs, injuries and poisonings, and others

ISSN: 1741-7015