Alloimmunization to Rh Antigen (D, C, E, C, E) Among Pregnant Women Attending Antenatal Care in South Western Uganda

Figures & data

Table 1 Demographic and Clinical Characteristics of the Participants (N=1369)

Variable	Category	Frequency	%
Age (n=1364)	10–20 years	338	24.8
	21–30 years	681	49.9
	31–40 years	328	24.1
	41–50 years	17	1.2
Parity (n=1349)	0–2	826	61.2
	3–5	418	31.0
	6–8	99	7.3
	9–11	6	0.4
Gravidity (n=1353)	0	592	43.8
	2–4	540	39.9
	5+	196	14.5
Trimester (n=1327)	First	88	6.6
	Second	862	65.0
	Third	377	28.4
Blood transfusion (n=1069)	No	1040	97.3
	Yes	29	2.7
Transfusion times (n=24)	Once	19	79.2
	Twice	2	8.3
	More than three times	3	12.5
Indication for transfusions (n=12)	Anemia	7	58.3
	Hemorrhage	5	41.7

Table 2 Distribution of D Antigens by Blood Group (N=1369)

Blood Group	D
	Positive (%)	Negative (%)
A	385 (29.8)	19 (24.3)
B	212 (16.5)	21 (27.1)
AB	52 (4.1)	4 (2.9)
O	642 (49.6)	34 (45.7)

Table 3 Distribution of IAT-Positive Results by Rh Blood Group (N=1369)

Rh D	IAT
	Negative	Positive	% Positive
Positive	1176	115	8.9
Negative	59	19	24.4
Total		134

Table 4 Rh Antigen and IAT Distribution (N=1369)

Antigen	Total	IAT
		%	Positive	% Positive
Rh antigen D	1299	94.9	114	8.77
Rh antigen E	218	15.92	12	0.94
Rh antigen C	263	19.21	32	2.34
Rh antigen e	1366	99.78	133	9.72
Rh antigen c	1360	99.34	34	2.48

Figure 1 Percentage distribution of Rh alloimmunization among the Rh D⁺ pregnant women.

Table 5 Distribution of IAT-Positive Results by ABO Blood Group (N=1369)

Blood Group	Total	IAT
		Negative	Positive	% Positive
A	404	361	43	10.6
B	233	208	25	10.7
AB	56	52	4	7.1
O	676	614	62	9.2