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. 2020 Jun 1;20:824. doi: 10.1186/s12889-020-08952-7

Table 4.

Sex-specific univariate and multivariate analyses of factors associated with syphilis infection

Variables Male (N = 608) Female (N = 1700)
Prevalence (%) cOR (95% CI) aOR (95% CI) Prevalence (%) cOR (95% CI) aOR (95% CI)
Age group (years)
 14–24 0 - 1.3 Ref.
 25–34 1.0 0.95(0.09–10.59) 1.8 1.34 (0.36–6.64)
 35–44 2.2 2.01(0.24–16.90) 1.6 1.23 (0.34–5.96)
 45–54 0.6 0.65(0.03–8.46) 0.8 0.61 (0.10–3.58)
 ≥ 55 1.1 Ref. 0.5 0.47 (0.02–4.07)
Ethnicity
 Yi 0 0
 Han and others 1.2 1.3
Education
 Illiteracy 2.3 Ref. 1.2 Ref.
 Primary school 0 1.4 1.13 (0.31–3.13)
 High school and above 0.6 0.25(0.03–2.00) 1.8 1.56 (0.23–5.64)
Occupation
 Students 0 0
 Farmers 1.1 1.2 0.36(0.05–2.81)
 Others 0 0.1 Ref.
Ever working away from home
 No 0.6 0.59 (0.02–3.25) 1.4 Ref.
 Yes 1.2 Ref. 1.3 0.88 (0.32–3.14)
Annual income
 < 1000 0 0.7 Ref.
 1000–2999 1.0 1.6 2.07 (0.53–14.82)
 3000–4999 2.6 1.0 1.30 (0.24–10.57)
 5000–9999 1.5 1.1 2.15 (0.32–18.66)
 ≥ 10,000 0 1.1 2.15 (0.32–18.66)
Marital status
 Ever married 1.4 1.4 Ref.
 Never married 0 0.4 0.32 (0.01–1.52)
Spouse syphilis
 No or unknown 1.0 Ref. 1.2 Ref. Ref.
 Yes 20.0 26.54 (0.91–217.16) 50.0 78.04 (1.96–3015.11) ** 126.66 (7.58–2122.94) **
Ever using injection drugs
 No 0.7 Ref. Ref. 1.3
 Yes 5.4 7.94 (1.91–29.32) ** 9.42 (2.47–35.87) ** 0
Having multiple sexual partners
 No 0.8 Ref. 1.1 Ref.
 Yes 2.1 2.55 (0.62–9.27) 2.6 2.41 (0.84–5.98)
Condom use
 Always or occasionally 1.5 Ref. 2.5 Ref.
 Never 1.2 0.79 (0.20–3.98) 0.8 0.34 (0.12–0.90)
Ever having blood transfusion
 No or unknown 1.1 1.2 Ref. Ref.
 Yes 0 10.5 10.32 (1.43–39.98) * 10.51 (1.58–41.21) **
HIV infection
 No 1.0 Ref. 1.2 Ref.
 Yes 2.5 2.73 (0.37–11.42) 3.1 2.78 (0.40–9.89)
HBV infection
 No 1.1 Ref. 1.1 Ref. Ref.
 Yes 1.3 1.3 (0.06–7.68) 4.2 4.11 (1.31–10.71) * 4.19 (1.35–10.93) **
HCV infection
 No 0.7 Ref. Ref. 1.2 Ref.
 Yes 7.4 11.18 (2.67–41.63) ** 13.28 (3.20–51.70) ** 11.8 11.42 (1.58–44.99) * 8.93 (0.82–96.97)

*P < 0.05, **P < 0.01