The distributions of the different ABO-Rhesus blood groups among the general population in Nigeria, compared with the distribution among healthy female controls and patients with PPCM in Sokoto, Northwestern Nigeria.

Table 4: The distributions of the different ABO-Rhesus blood groups among the general population in Nigeria, compared with the distribution among healthy female controls and patients with PPCM in Sokoto, Northwestern Nigeria.

Blood group	% National average (males + females)	% National average (females only)	% distribution among female controls in Sokoto	% Distribution among PPCM patients in Sokoto
A	20.78	20.50	26.7	10.3
B	23.50	20.70	21.9	55.1^***
AB	3.18	1.60	1.9	3.8
O	51.91	57.20^**	49.5	30.8

(Adeyemo and Soboyejo, [18]; Egesie, et al. [19]; Jeremiah [20])

** = p < 0.005; *** = p < 0.0001