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Table 2 The prevalence of syphilis and associated factors among pregnant women

From: HIV-1, HSV-2 and syphilis among pregnant women in a rural area of Tanzania: Prevalence and risk factors

Characteristics

N (%)

Syphilis prevalence % (95% CI)

Age-adjusted OR (95% CI) (p-value)

Multivariate analysis OR (95% CI) (p-value)

Total

1296

1.6 (1.03 – 2.51)

  

Age groups (years)

    

15–19

165 (12.7)

0

__

__

20–24

417 (32.2)

2.4 (1.22 – 4.51)

  

25–29

349 (26.9)

0.9 (0.22 – 2.69)

  

30–34

224 (17.3)

3.1 (1.38 – 6.60)

  

≥35

141 (10.9)

0.7 (0.03 – 4.47)

  

Marital status

    

Married

1183 (91.3)

1.8 (1.13 – 2.75)

  

Single/divorced/separated/widow

113 (8.7)

0

__

__

Education (years)

    

None

349 (28.2)

2.3 (1.07 – 4.64)

1

 

1–6 years

174 (13.4)

1.7 (0.45 – 5.36)

0.8 (0.20 – 2.85)

 

7 years or more

773 (59.7)

1.3 (0.66 – 2.48)

0.6 (0.22 – 1.43)

__

Polygamous relationship

    

No

1024 (79.0)

1.1 (0.57 – 1.98)

1

1

Yes

272 (21.0)

3.7 (1.88 – 6.87)

2.7 (1.08 – 6.64) (p = 0.03)

2.6 (1.06 – 6.51) (p = 0.03)

a Age at first pregnancy

    

< 18 years

158 (14.0)

2.5 (0.81 – 6.76)

__

 

≥ 18 years

974 (86.0)

1.7 (1.05 – 2.84)

  

Outcome of previous pregnancy (n = 1155)

    

Live child

916 (79.3)

1.3 (0.71 – 2.34)

1

1

Stillbirth

140 (12.1)

2.1 (0.55 – 6.62)

1.6 (0.45 – 5.92)

2.4 (0.64 – 8.95)

Spontaneous abortion

99 (8.57)

6.1 (2.49 – 13.24)

4.9 (1.78 – 13.25) (p = 0.00)

4.3 (1.52 – 12.02) (p = 0.00)

Number of lifetime sexual partners

    

One only

1231 (95.0)

1.2 (0.71 – 2.05)

1

1

More than one

65 (5.0)

8.8 (3.64 – 18.85)

7.8 (2.94 – 20.86) (p = 0.00)

5.4 (1.88 – 15.76) (p = 0.00)

Use of contraceptives other than condom

    

No

1088 (84.0)

1.8 (1.16 – 2.88)

1

1

Yes

208 (16.0)

0.5 (0.02 – 3.06)

0.3(0.03 – 1.93)

0.3 (0.04 – 2.66)

History of sexually transmitted infections

    

No

1135 (87.6)

1.4 (0.84 – 2.33)

1

1

Yes

161 (12.4)

3.1 (1.15 – 7.48)

2.2 (0.81 – 6.20)

1.8 (0.60 – 5.18)

Ever used condom

    

No

1233 (95.1)

1.7 (1.08 – 2.64)

__

__

Yes

63 (4.9)

0

  
  1. Total syphilis positive (n = 21/1296). Results for analysis of syphilis prevalence by clinic locations are not shown due to very small numbers or none-to give any substantial statistical inference.
  2. a Analysed for those aged 20 ≥ years at the time of survey (n = 1132)