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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)