Table 1 Baseline characteristics of N = 941 pregnant and postpartum adult women enrolled in a prospective observational cohort study in Botswana, 2010–2012 overall and according to knowledge of HIV status prior to becoming pregnant

Demographics

Location (n = 941)

0.16

 Mochudi

394 (42 %)

117 (41 %)

200 (45 %)

77 (37 %)

 Gaborone

547 (58 %)

171 (59 %)

246 (55 %)

130 (63 %)

Age, in years (n = 941)

<0.0001

 18 to 24 years

319 (34 %)

46 (16 %)

169 (38 %)

104 (50 %)

 25 to 29 years

261 (28 %)

69 (24 %)

143 (32 %)

49 (24 %)

 30 to 34 years

216 (23 %)

98 (34 %)

87 (20 %)

31 (15 %)

 25 to 39 years

105 (11 %)

56 (19 %)

33 (7 %)

16 (8 %)

 40 years and older

40 (4 %)

19 (7 %)

14 (3 %)

7 (3 %)

 Median (IQR)^b

27 (23, 32)

30 (26, 34)

26 (22, 30)

24 (21, 30)

<0.0001**

Relationship status (n = 941)

0.10

 Married

70 (7 %)

24 (8 %)

35 (8 %)

11 (5 %)

 Not married, but living together

239 (25 %)

75 (26 %)

116 (26 %)

48 (23 %)

 Not married and not living together

574 (61 %)

167 (58 %)

278 (62 %)

129 (62 %)

 Not in a serious relationship

58 (6 %)

22 (8 %)

17 (4 %)

19 (9 %)

Maternal HIV serostatus at enrolment (n = 941)

<0.0001

 HIV-uninfected

473 (50 %)

9 (3 %)

377 (85 %)

87 (42 %)

 HIV-infected

468 (50 %)

279 (97 %)

69 (15 %)

120 (58 %)

Socioeconomic factors

Education (n = 939)

<0.0001

 None or primary

94 (10 %)

49 (17 %)

24 (5 %)

21 (10 %)

 Junior secondary

449 (48 %)

176 (61 %)

178 (40 %)

95 (46 %)

 Senior secondary

272 (29 %)

43 (15 %)

162 (36 %)

67 (32 %)

 Tertiary

124 (13 %)

19 (7 %)

81 (18 %)

24 (12 %)

Employment (n = 939)

0.20

 Employed

401 (43 %)

130 (45 %)

188 (42 %)

83 (40 %)

 Unemployed and looking for work

248 (26 %)

80 (28 %)

121 (27 %)

47 (23 %)

 Unemployed but not looking for work^c

290 (31 %)

77 (27 %)

137 (31 %)

76 (37 %)

Income (n = 939)^d

<0.0001

 None

574 (61 %)

161 (56 %)

289 (65 %)

124 (60 %)

 <$57 per month

50 (5 %)

28 (10 %)

13 (3 %)

9 (4 %)

 $57 to $113 per month

144 (15 %)

53 (19 %)

48 (11 %)

43 (21 %)

 >$113 per month

171 (18 %)

44 (15 %)

96 (22 %)

31 (15 %)

Household size (n = 938)

0.04

 0 to 4 people

277 (30 %)

83 (29 %)

139 (31 %)

55 (27 %)

 5 to 6 people

201 (21 %)

54 (19 %)

107 (24 %)

40 (19 %)

 7 to 9 people

218 (23 %)

80 (28 %)

95 (21 %)

43 (21 %)

 10 or more people

242 (26 %)

70 (24 %)

104 (23 %)

68 (33 %)

 Television or car in the household (n = 935)

619 (66 %)

168 (59 %)

325 (73 %)

126 (61 %)

0.0001

Reproductive history

Total number of prior pregnancies including current pregnancy (n = 941)

<0.0001

 1

296 (31 %)

34 (12 %)

165 (37 %)

97 (47 %)

 2

279 (30 %)

77 (27 %)

159 (36 %)

43 (21 %)

 3

175 (19 %)

74 (26 %)

62 (14 %)

39 (19 %)

 4 or more

191 (20 %)

103 (36 %)

60 (13 %)

28 (14 %)

 Median (IQR)^b

2 (1 – 3)

3 (2 – 4)

2 (1 – 3)

2 (1 – 3)

<0.0001**

Any child died before age 5 years (n = 941)

93 (10 %)

51 (18 %)

26 (6 %)

16 (8 %)

<0.0001

Current pregnancy unintended (n = 940)

416 (44 %)

141 (49 %)

168 (38 %)

107 (52 %)

0.001

Contraception use prior to current pregnancy among women with unintended pregnancy (n = 416)

0.54

 Was using contraception

268 (64 %)

93 (66 %)

103 (61 %)

72 (67 %)

 Was not using contraception

148 (36 %)

48 (35 %)

65 (39 %)

35 (33 %)

Type of contraception used (n = 269)

0.41

 Oral contraceptive pills

36 (13 %)

16 (17 %)

11 (11 %)

9 (13 %)

 Injectable contraception

14 (5 %)

4 (4 %)

8 (8 %)

2 (3 %)

 Condoms

219 (81 %)

74 (79 %)

84 (82 %)

61 (85 %)

 Intrauterine device, diaphragm or other

0 (0 %)

0 (0 %)

0 (0 %)

0 (0 %)

Future desire for children (n = 941)

<0.0001

 No

577 (61 %)

223 (77 %)

225 (50 %)

129 (62 %)

 Yes

229 (24 %)

34 (12 %)

155 (35 %)

40 (19 %)

 Do not know

135 (14 %)

31 (11 %)

66 (15 %)

38 (18 %)