ABO and Rhesus Blood Groups and Risk of Endometriosis in a French Caucasian Population of 633 Patients Living in the Same Geographic Area

Table 4

Distribution of ABO and Rh blood groups in women with endometriosis according to the rAFS classification.

	rAFS I; (%)	rAFS II; (%)	rAFS III; (%)	rAFS IV; (%)	value^a
ABO groups					0.26
A	27 (48)	37 (55)	40 (40)	44 (51)
AB	2 (5)	0 (0)	6 (6)	2 (2)
B	4 (11)	6 (9)	16 (16)	7 (8)
O	23 (36)	24 (36)	28 (38)	34 (39)
Rhesus					0.79
Positive	41 (73)	51 (76)	80 (80)	66 (76)
Negative	15 (27)	16 (24)	20 (20)	22 (24)
Total	66	67	100	88

^aPearson chi-square.
rAFS: revised American Fertility Society classification.