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. 2013 Aug 29;8(8):e72149. doi: 10.1371/journal.pone.0072149

Table 2. Univariate and multivariate analysis of demographic and socioeconomic factors associated with positive syphilis test among pregnant women.

Positive syphilis test Univariate analysis Multivariate analysis
Characteristic No. positive (n = 106) % positive (0.4%) OR (95% CI) p OR (95% CI) p
Age
Less than 21 years old 5 0.2 1.00 1.00
21 to 25 years old 24 0.2 1.22 (0.47–3.20) 0.69 1.01 (0.38–2.68) 0.99
26 to 30 years old 38 0.4 2.26 (0.89–5.74) 0.09 1.81 (0.71–4.67) 0.22
31 to 35 years old 19 0.6 3.19 (1.19–8.56) 0.02 2.70 (0.99–7.32) 0.05
More than 35 years old 20 1.3 7.29 (2.73–19.46) <0.01 5.90 (2.13–16.34) <0.01
Marital status
Single* 8 0.9 2.55 (1.24–5.26) 0.01
Married 98 0.4 1.00
Highest level of school completed
Illiterate/elementary school 19 0.7 6.23 (0.83–46.64) 0.08
Middle school 73 0.4 3.14 (0.44–22.63) 0.26
High school 13 0.4 3.24 (0.42–24.29) 0.26
More than high school 1 0.1 1.00
No. of children
Zero 25 0.2 1.00
One 49 0.5 2.21 (1.36–3.58) <0.01
Two or more 32 0.7 3.37 (2.00–5.70) <0.01
History of adverse pregnancy outcome
No 74 0.3 1.00
Yes 31 1.2 3.81 (2.50–5.81) <0.01 3.64 (2.30–5.76) <0.01
Gestational trimester at testing
First trimester 17 0.4 1.00
Second trimester 26 0.5 1.43 (0.77–2.64) 0.25
Third trimester and later 47 0.3 0.85 (0.49–1.48) 0.56
Time spent residing in current community (months)
Less than 3 months 10 0.4 1.00
3 to 6 months 4 0.4 1.10 (0.34–3.50) 0.88
6 to 12 months 8 0.6 1.65 (0.65–4.20) 0.29
More than 12 months 76 0.4 1.07 (0.55–2.07) 0.84
Amount of time husband/boyfriend slept outside the house in last 12 months
Less than 1 week 71 0.4 1.00
1 week to 1 month 11 0.6 1.79 (0.95–3.39) 0.07
1 to 3 months 8 1.1 3.03 (1.45–6.32) <0.01
3 to 6 months 3 0.7 2.08 (0.65–6.63) 0.22
More than 6 months 12 0.3 0.92 (0.50–1.70) 0.78
*

Includes women who are not married, separated, widowed, and divorced.