Table 3 Prevalence of syphilis in association with social-demographic characteristics of the ANC attendees, Tanzania 2011

Marital status

Married

34,543

2.5

1

1

Single

4565

2.2

0.90(0.733–1.12)

0.35

1.19(0.95–1.48)

0.12

Divorced

78

4

1.64(0.52–5.22)

0.40

1.47(0.458–4.69)

0.52

Other

103

1.9

0.78(0.19–3.2)

0.74

0.8(0.19–3.28)

0.76

Age group

15–24

19,316

2.4

1

1

25–34

16,321

2.8

1.37(1.19–1.57)

<0.05

1.12(0.94–1.33)

0.20

35+

3725

3.3

1.66(1.34–2.03)

<0.05

1.06(0.81–1.39)

0.67

Not stated

336

1.6

0.77(0.31–1.86)

0.56

0.76(0.31–1.86)

0.55

Previous pregnancy

0

10,487

1.7

1

1

1–2

16,401

2.1

1.23(1.03–1.48)

0.06

1.13(0.93–1.39)

0.23

3–4

8121

3.3

1.94(1.60–2.35)

<0.05

1.50(1.17–1.92)

<0.05

>5

4004

4.2

2.48(2.00–3.08)

<0.05

1.70(1.27–2.29)

< 0.05

Not stated

694

1.6

0.95(0.52–1.76)

0.88

0.78(0.41–1.49)

0.46

Residence

Urban

20,397

1.69

1

1

Semi Urban

10,680

3.13

1.88(1.62–2.19)

< 0.05

1.65(1.40–1.93)

< 0.05

Rural

8621

3.2

1.89(1.61–2.24)

< 0.05

1.37(1.14–1.65)

<0.05

Education

No Formal Education

6017

4.5

1

1

Adult Education

255

3.2

1.40(0.44–4.46)

0.57

1.02(0.32–3.29)

0.97

Primary education

27,222

2.3

0.96(0.25–3.71)

0.96

0.73(0.19–2.85)

0.65

Secondary

5521

1.3

0.69(0.22–2.17)

0.52

0.58(0.18–1.87)

0.37

Post Secondary

581

0.7

0.39(0.12–1.28)

0.12

0.39(0.12–1.26)

0.12

Not stated

102

3.3

0.21(0.05–0.96)

0.04

0.22(0.05–0.99)

0.05

Duration of stay

Less than 6 months

4991

2.2

1

1

6 months and above

33,985

2.5

0.79(0.48–1.29)

0.34

1.01(0.61–1.67)

0.97

Not stated

722

2.8

0.89(0.56–1.42)

0.63

0.87(0.55–1.38)

0.56