Table 2 (Sero) prevalence ratios of CT for potential determinants, by ethnic group. Results of stratified unadjusted Poisson regression with robust variance

  Male

1

1

1^*

1

1

1

1^*

  Female

0.97 (0.75–1.25)

1.08 (0.84–1.37)

1.18 (1.01–1.38)

0.96 (0.79–1.18)

0.80 (0.59–1.09)

1.21 (0.90–1.63)

1.12 (1.01–1.23)

  First

N/A

1

1

1^*

1

1

1^***

  Second

N/A

1.00 (0.74–1.35)

0.97 (0.85–1.12)

0.73 (0.53–0.99)

1.06 (0.77–1.45)

0.95 (0.70–1.29)

0.82 (0.74–0.91)

  18–24 years

1

1

1

1

1

1

1

  25–29 years

0.98 (0.70–1.36)

1.31 (0.93–1.83)

1.03 (0.87–1.22)

0.96 (0.73–1.27)

1.11 (0.73–1.68)

0.88 (0.58–1.32)

0.98 (0.86–1.11)

  30–34 years

0.99 (0.70–1.38)

1.45 (1.05–2.00)^*

1.03 (0.87–1.23)

1.17 (0.93–1.47)

1.08 (0.72–1.63)

0.96 (0.65–1.41)

1.01 (0.89–1.14)

  Low

1

1

1

1

1

1

1

  Intermediate

1.24 (0.65–2.39)

1.05 (0.76–1.44)

0.97 (0.81–1.17)

0.76 (0.62–0.94)^*

0.83 (0.60–1.14)

1.01 (0.71–1.44)

0.99 (0.87–1.11)

  High

1.09 (0.59–2.04)

0.93 (0.66–1.32)

0.91 (0.73–1.13)

0.79 (0.60–1.05)

0.66 (0.42–1.04)

0.95 (0.63–1.42)

0.84 (0.74–0.96)^*

  Low

1

1

1

1

1

1

1

  Intermediate

0.69 (0.43–1.10)

1.13 (0.83–1.53)

1.09 (0.92–1.28)

0.74 (0.53–1.02)

0.86 (0.61–1.21)

0.99 (0.68–1.36)

0.91 (0.80–1.03)

  High

0.82 (0.58–1.15)

1.11 (0.81–1.52)

0.90 (0.71–1.14)

0.77 (0.49–1.20)

0.62 (0.38–1.01)

0.81 (0.52–1.27)

0.80 (0.70–0.91)^**

  Number of lifetime sex partners^a

1.32 (1.17–1.50)^***

1.19 (1.06–1.33)^**

1.05 (0.97–1.13)

1.02 (0.90–1.17)

1.12 (1.00–1.25)

1.12 (1.00–1.25)

1.16 (1.11–1.21)^***

  Age at sexual debut^b

0.90 (0.84–0.98)^*

0.97 (0.93–1.01)

0.99 (0.96–1.02)

0.96 (0.93–1.00)^*

0.96 (0.92–1.00)^*

0.96 (0.93–1.00)^*

0.95 (0.93–0.96)^***

  No sexual contact

1

1

1

1

1

1

1

  Steady partner^c

0.97 (0.64–1.48)

1.02 (0.72–1.43)

1.16 (0.89–1.52)

1.11 (0.86–1.43)

1.16 (0.75–1.79)

1.53 (0.95–2.45)

1.11 (0.96–1.29)

  Consistent condom use^d

1.32 (0.77–2.26)

1.16 (0.71–1.90)

1.40 (1.04–1.87)^*

0.42 (0.16–1.13)

0.88 (0.43–1.79)

0.56 (0.20–1.54)

1.10 (0.88–1.36)

  Inconsistent condom use ^d

1.37 (0.87–2.16)

1.41 (0.86–2.29)

1.34 (1.00–1.80)

0.92 (0.58–1.47)

1.35 (0.75–2.45)

2.44 (1.38–4.30)^**

1.42 (1.18–1.70)^***

  No

1

1

1^*

1

1^*

1^*

1^***

  Yes

1.24 (0.87–1.77)

1.38 (1.00–1.92)

1.16 (1.00–1.33)

1.12 (0.90–1.40)

1.68 (1.10–2.54)

1.56 (1.06–2.30)

1.51 (1.35–1.68)

  No

1^*

1^***

1

1

1

1

1^***

  Yes

1.38 (1.04–1.83)

1.64 (1.26–2.13)

1.07 (0.93–1.24)

1.15 (0.93–1.43)

1.48 (0.96–2.29)

1.18 (0.80–1.75)

1.45 (1.31–1.61)