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

Table 1

Distribution of ABO and Rh blood groups in women with and without endometriosis.

	Endometriosis; (%)	Controls; (%)	Crude OR; (95% CI)	aOR; (95% CI)^a	value^b
ABO groups
A	148 (47.5)	139 (43.2)	1.20 (0.86–1.68)	1.18 (0.82–1.70)	0.270
AB	10 (3.0)	10 (3.1)	1.10 (0.45–2.80)	1.24 (0.47–3.29)	0.780
B	32 (10.3)	36 (11.2)	1.01 (0.58–1.70)	1.04 (0.58–1.80)	0.980
O	121 (38.9)	137 (42.6)	1
Rhesus
Negative	72 (23.1%)	49 (15.2)	1.27 (1.07–1.52)	1.90 (1.20–2.90)	0.011
Positive	239 (76.9%)	273 (84.8)	1
Total	311	322

^aLogistic binary regression (age, pain, BMI, blood type and rhesus, parity, and gestity); aOR: adjusted odds ratio.
^bPearson chi-square.