Table 2 Sociodemographic and sex work characteristics of female sex workers with available data on pregnancy intention for each study period

Age

30.9 (10.2)

 < 25

211 (35.2)

73 (37.8)

138 (33.9)

115 (30.8)

33 (36.7)

82 28.9)

 25–29

132 (22.0)

59 (30.6)

73 (17.9)

62 (16.6)

21 (23.3)

41 (14.4)

 30–34

83 (13.8)

27 (14.0)

56 (13.8)

53 (14.2)

10 (11.1)

43 (15.1)

 ≤ 35

174 (29.0)

34 (17.6)

140 (34.4)

< 0.0001

144 (38.5)

26 (28.9)

118 (41.5)

0.0413

Migrant

 No

325 (54.2)

99 (51.3)

226 (55.5)

209 (55.8)

38 (42.2)

171 (60.2)

 Yes

275 (45.8)

94 (48.7)

181 (44.5)

0.3310

165 (44.1)

52 (57.8)

113 (39.8)

0.0027

Religion

 Muslim

252 (42.2)

84 (44.2)

168 (41.3)

146 (39.0)

33 (36.7)

113 (39.8)

 Catholic

134 (22.5)

38 (20.0)

96 (23.6)

95 (25.4)

23 (25.6)

72 (25.4)

 Other

211 (35.3)

68 (35.8)

143 (35.1)

0.5998

133 (35.6)

34 (37.8)

99 (34.9)

0.8456

 Missing

3

3

Education

 Unschooled or Koranic school

200 (33.5)

64 (33.7)

136 (33.4)

132 (35.4)

26 (28.9)

106 (37.5)

 Primary

238 (39.9)

73 (38.4)

165 (40.5)

149 (40.0)

42 (46.7)

107 (37.8)

 Secondary

121 (20.3)

40 (21.1)

81 (19.9)

71 (20.3)

15 (16.7)

56 (19.8)

 Superior

38 (6.4)

13 (6.8)

25 (6.1)

0.9537

21 (6.4)

7 (7.8)

14 (5.0)

0.2531

 Missing

3

3

1

1

Marital status

 Married or non-marital relationship

51 (8.5)

12 (6.3)

39 (9.6)

33 (8.8)

7 (7.8)

26 (9.2)

 Divorced, separated or widowed

214 (35.9)

52 (27.4)

162 (39.8)

162 (43.8)

35 (38.9)

127 (44.7)

 Single

332 (55.6)

126 (66.3)

206 (50.6)

0.0015

179 (47.9)

48 (53.3)

131 (46.1)

0.4905

 Missing

3

3

Has a boyfriend

 Yes

369 (62.9)

116 (63.0)

253 (62.8)

228 (61.4)

63 (70.8)

166 (58.5)

 No

218 (37.1)

68 (37.0)

15 (37.2)

0.9510

143 (38.5)

26 (29.2)

117 (41.5)

0.0380

 Missing

13

9

4

3

1

1

Number of biological children

1.5 (1.5)

 None

198 (33.0)

77 (39.9)

121 (29.7)

107 (28.6)

30 (33.3)

77 (27.1)

 1

167 (27.8)

55 (28.5)

112 (27.5)

100 (26.7)

25 (27.8)

75 (26.4)

 ≥ 2

235 (39.2)

61 (31.6)

174 (42.8)

0.0158

167 (44.7)

35 (38.9)

132 (46.5)

0.3957

HIV status

 Positive

131 (21.8)

37 (19.2)

94 (23.1)

91 (24.5)

13 (14.6)

78 (27.6)

 Negative

467 (77.8)

156 (80.8)

311 (76.8)

0.2642

281 (75.5)

76 (85.4)

205 (72.4)

0.0131

 Missing

2

2

2

1

1

At least one pregnancy

 Yes

39 (6.5)

24 (7.2)

 No

368 (61.3)

221 (66.0)

Total number of pregnancies (mean)

43 (1.1)

25 (1.0)

Pregnancy intention

 Positive

97 (16.2)

35 (18.1)

62 (15.2)

61 (16.4)

15 (16.7)

46 (16.3)

 Ambivalent

158 (26.3)

48 (27.0)

110 (27.0)

100 (26.3)

22 (24.4)

78 (27.5)

 Negative

345 (57.5)

110 (57.0)

235 (57.7)

0.6295

213 (57.3)

53 (58.9)

160 (56.3)

0.8519

Pregnancy intention (dichotomic)

 Positive

166 (27.7)

62 (32.1)

104 (25.6)

94 (25.1)

21 (23.3)

73 (25.7)

 Negative

434 (72.3)

131 (67.9)

303 (74.5)

0.0928

280 (74.9)

69 (76.7)

211 (74.3)

0.6514

Age at sex work debut (years)

 ≤ 17

124 (21.1)

38 (20.5)

86 (21.43)

73 (19.7)

21 (23.6)

52 (18.4)

 18–21

154 (26.2)

60 (32.4)

94 (23.3)

81 (21.8)

19 (21.4)

62 (22.0)

 22–25

107 (18.2)

39 (21.1)

68 (16.8)

59 (15.9)

14 (15.7)

45 (16.0)

 26–29

63 (10.7)

17 (9.2)

46 (11.4)

44 (11.9)

14 (15.7)

30 (10.6)

 ≥ 30

141 (23.9)

31 (16.8)

110 (27.2)

0.0193

114 (30.7)

21 (23.6)

93 (33.0)

0.3612

 Missing

11

8

7

3

1

1

Duration of involvement in sex work (years)

 ≤ 1

109 (18.3)

42 (22.2)

67 (16.5)

64 (17.0)

19 (21.1)

45 (15.8)

 2

141 (23.7)

55 (29.1)

86 (21.1)

68 (18.0)

21 (23.3)

45 (15.9)

 3–4

146 (24.5)

40 (21.2)

106 (26.0)

97 (25.7)

22 (24.4)

75 (26.4)

 5–9

131 (22.0)

36 (19.1)

95 (23.3)

92 (24.4)

18 (20.0)

74 (26.1)

 ≥ 10

69 (11.6)

16 (8.5)

53 (13.0)

0.0334

56 (14.9)

10 (11.1)

45 (15.9)

0.2449

 Missing

4

4

0

Money received for last payed sex (FCFA)^©

3616.6 (4082.0)

 ≤ 1500

133 (22.3)

31 (16.3)

102 (25.1)

106 (28.3)

24 (26.7)

82 (28.9)

 1501—2000

139 (23.4)

48 (25.3)

91 (22.4)

83 (22.2)

18 (20.0)

65 (22.9)

 2001—5000

272 (45.6)

94 (49.5)

178 (43.7)

156 (41.7)

42 (46.7)

114 (40.1)

 > 5000

53 (8.9)

17 (9.0)

36 (8.9)

0.1189

29 (7.8)

6 (6.7)

23 (8.0)

0.7404

 Missing

3

3

Condom use with boyfriend^©©

 No boyfriend

162 (27.6)

56 (30.4)

106 (26.3)

95 (25.6)

28 (31.5)

67 (23.8)

 Never/Not always

176 (30.0)

50 (31.3)

126 (31.3)

113 (30.5)

28 (31.5)

85 (30.1)

 Always

31 (5.3)

10 (5.4)

21 (5.2)

20 (5.4)

7 (7.9)

13 (4.6)

 No sexual relation

218 (37.1)

68 (37.0)

150 (37.2)

0.6820

143 (38.5)

26 (29.2)

117 (41.5)

0.1339

 Missing

13

11

3

1

1

Use of hormonal contraception^©©©

 Yes

146 (24.4)

46 (23.8)

100 (24.6)

71 (19.0)

22 (24.4)

49 (17.3)

 No

453 (75.6)

147 (76.2)

306 (75.4)

0.8320

303 (81.0)

68 (75.6)

235 (82.8)

0.1296

 Missing

1

1