Table 1 Baseline socio-demographic and clinical characteristics of pregnant and non-pregnant women enrolled in the CAPRISA 002 Study, KwaZulu-Natal Province (2004–2019)

Socio-demographic

 Median age at enrollment (IQR), years

22.0

(19.0—26.0)

37.5

(26.0—43.0)

24.0

(22.0—27.5)

25.0

(22.0—31.0)

29.0

(26.0—32.0)

29.0

(26.0—34.0)

 Median age at pregnancy (IQR), years

23

(20.5–26.5)

26.5

(24–30)

31

(28–33)

Age group, years (n, %)

 18–24

14 (58.3)

32 (14.3)

28 (43.8)

57 (35.4)

6 (8.8)

16 (9.8)

  > 24

10 (41.7)

192 (85.7)

36 (56.3)

104 (64.6)

62 (91.2)

148 (90.2)

Highest level of education (n, %)^a

  < grade 8

0

60 (26.8)

2 (3.1)

9 (5.6)

10 (6.1)

  ≥ grade 8

24 (100.0)

164 (73.2)

62 (96.9)

152 (94.4)

68 (100.0)

154 (93.9)

Relationship status (n, %)

 Married

0

16 (7.1)

1 (1.6)

8 (5.0)

2 (2.9)

7 (4.3)

 Stable partner

9 (37.5)

64 (28.6)

46 (71.9)

114 (70.8)

54 (79.4)

116 (70.7)

 Casual partner(s)

12 (50.0)

127 (56.7)

7 (10.9)

15 (9.3)

1 (1.5)

18 (11.0)

 Other^b

3 (12.5)

17 (7.6)

10 (15.6)

24 (14.9)

11 (16.2)

23 (14.0)

Number of dependents (n, %)

 0–1

19 (79.2)

75 (33.6)

47 (74.6)

98 (62.0)

45 (68.2)

105 (64.0)

  > 1

5 (20.8)

148 (66.4)

16 (25.4)

60 (38.0)

21 (31.8)

59 (36.0)

Pregnant before (n, %)

 Yes

2 (33.3)

36 (60.0)

51 (76.1)

 No

4 (66.7)

24 (40.0)

16 (23.9)

Laboratory evaluations at enrolment into each study phase

 Median CD4 count (IQR), cell/µL

-

-

519 (417—696)

526 (420—667)

423 (313—601)

413 (287—566)

 Mean log10viral load (SD), copies/ml

-

-

4.3 (0.8)

4.5 (0.9)

4.2 (1.0)

4.0 (1.1)