Table 3

Total prevalence of syphilis (scar and active infections) and Neisseria gonorrhoeae (NG) infection, and risk factors associated with active syphilis only and NG infection within the healthcare-based population of New Caledonia aged 18–49 years

Active syphilis infectionNG infection
Univariate analysisMultivariate analysisUnivariate analysisMultivariate analysis
Variablesn cruden weightedweighted and adjusted prevalencecrudep Valueadjustedp Valuep Valuen cruden weightedweighted and adjusted prevalencecrudep Valueadjustedp Valuep Value
% and (95% CI)OR (95% CI)OR (95% CI)c% and (95% CI)OR (95% CI)OR (95% CI)c
Total prevalence
 Active syphilis4498.40.42(0.00 to 0.86)
 NG2141 7303.51(1.93 to 5.09)
Sex0.4312
 Male082135.03.55(1.04 to 6.06)1–
 Female4498.40.85(0.00 to 1.73)132038.03.47(1.55 to 5.38)0.98(0.92 ; 1.04)
Ethnicity*<0.0001†<0.0001‡<0.0001‡ c=0.783
 Melanesian4498.41.1(0.0 to 2.24)132139.04.73(2.05 to 7.40)4.32(3.72 to 5.02)4.14(3.55–4 to.83)
 Polynesian01188.81.13(0.00 to 3.36)1– –1– –
 European041129.02.94(0.03 to 5.85)2.64(2.26 to 3.08)3.22(2.75 to 3.76)
 Asian00
 Mixed race02526.23.78(0.00 to 9.08)3.42(2.89 to 4.05)3.47(2.92 to 4.11)
Age group (years)<0.0001†<0.0001‡<0.0001‡ c=0.874<0.0001†<0.0001‡
 18–252310.80.94(0.00 to 2.28)3.17(2.46 to 4.09)2.50(2.46 to 4.09)101813.05.47(1.96 to 8.97)8.56(7.32 to 10.01)7.87(6.71 to 9.23)
 26–331114.30.37(0.00 to 1.09)1.22(0.91 to 1.64)1.19(0.91 to 1.64)81562.05.01(1.32 to 8.69)7.80(6.66 to 9.13)8.49(7.23 to 9.98)
 34–4102623.42.19(0.00 to 5.18)3.31(2.80 to 3.92)3.59(3.03 to 4.25)
 42–49173.30.28(0.0 to 0.84)1–1–1174.50.67(0.00 to 1.99)1–1–
Province<0.0001†<0.0001‡<0.0001†<0.0001‡
 Loyalty Islands173.31.01(0.00 to 2.99)4.99(3.81 to 6.54)6.95(3.81 to 6.54)1144.61.99(0.00 to 5.86)1–1–
 North2230.41.04(0.0 to 2.49)4.99(4.12 to 6.05)4.11(4.12 to 6.05)81074.04.87(1.46 to 8.28)2.52(2.11 to 3.00)2.11(1.76 to 2.53)
 South1194.70.22(0.00 to 0.64)1–1–122954.03.3(1.40 to 5.20)1.68(1.42 to 1.98)2.37(1.99 to 2.82)
Marital status<0.0001†<0.0001‡<0.0001†<0.0001‡
 Single3425.10.88(0.00 to 1.91)8.42(6.57 to 10.80)6.28(6.57 to 10.80)122482.05.13(2.06 to 8.20)2.2(2.07 to 2.34)2.16(2.02 to 2.31)
 In couples173.30.1(0.00 to 0.31)1–1–91691.02.4(0.78 to 4.02)1– –1–
Study level<0.0001†<0.0001‡<0.0001†<0.0001‡
 Without a diploma173.31.08(0.00 to 3.22)1.73(1.32 to 2.27)2.02(1.32 to 2.27)4898.25.91(0.16 to 11.67)2.16(1.99 to 2.35)4.25(3.88 to 4.65)
 Intermediate2230.40.61(0.00 to 1.47)2.2(1.82 to 2.67)1.99(1.82 to 2.67)91406.03.74(1.13 to 6.35)1.34(1.25 to 1.44)1.81(1.67 to 1.96)
 Bachelor and higher study1194.70.29(0.00 to 0.87)1–1–81868.02.82(0.79 to 4.86)1–1–
  • *1 missing value for ethnicity among a participant with gonorrhoea.

  • †RV test p<0.20.

  • ‡RV test p<0.05.