Table 1

Prevalence and odds of C. trachomatis and N. gonorrhoeae infections by socio-demographic and behavioral characteristics and other STIs
Factor Sample size Gonorrhoea Chlamydia
% OR (95% CI) % OR (95% CI)
FSW category
 High-tier 1192 5.54 Reference 16.36 Reference
 Middle-tier 1298 5.24 0.94 (0.67–1.34) 0.74 16.87 1.04 (0.84–1.28) 0.73
 Low-tier 609 8.04 1.49 (1.02–2.19) 0.04 20.03 1.28 (1.00–1.65) 0.05
Age group (years)
 15–20 617 8.10 Reference 27.88 Reference
 21–25 1149 5.05 0.60 (0.41–0.89) 0.01 18.53 0.59 (0.47–0.74) <0.001
 26–30 648 4.94 0.59 (0.37–0.93) 0.02 10.03 0.29 (0.21–0.39) <0.001
 >30 685 6.28 0.76 (0.50–1.16) 0.20 12.55 0.37 (0.28–0.49) <0.001
Geographic area
 Other provinces 2301 5.43 Reference 16.30 Reference
 Guangxi 798 7.27 1.36 (0.99–1.88) 0.06 20.18 1.30 (1.06–1.59) 0.01
Education level
 Primary school or below 460 7.17 Reference 14.56 Reference
 Secondary school 2074 5.59 0.77 (0.51–1.14) 0.19 17.84 1.27 (0.96–1.69) 0.09
 High school or above 562 6.05 0.83 (0.51–1.37) 0.47 17.61 1.25 (0.89–1.76) 0.19
Marital status
 Never married 1890 5.38 Reference 19.79 Reference
 Married 1113 6.65 1.25 (0.92–1.70) 0.15 13.57 0.64 (0.52–0.78) <0.001
 Divorced 87 5.75 1.07 (0.42–2.70) 0.88 11.49 0.53 (0.27–1.03) 0.06
Consistent condom use in past month
 Yes 1611 6.33 Reference 16.57 Reference
 No 1488 5.44 0.85 (0.63–1.15) 0.29 17.08 1.11 (0.92–1.34) 0.27
Other STIs
 Syphilis 200 9.00 1.64 (0.99–2.73) 0.06 14.00 0.77 (0.51–1.15) 0.20
 Gonorrhoea 183 28.41 1.99 (1.43–2.79) <0.001
 Chlamydia 536 9.70 1.99 (1.43–2.79) <0.001

OR: odds ratio; CI: confidence interval.

Chen et al.

Chen et al. BMC Public Health 2013 13:121   doi:10.1186/1471-2458-13-121

Open Data