Table 2 Factors associated with chlamydia testing among FSW in Southern China, 2018 (N = 1207)

 18–25

Ref

–

Ref

–

 26–29

0.51(0.28–0.93)

0.028

0.73(0.37–1.46)

0.371

 30–34

0.56(0.30–1.02)

0.058

1.12(0.44–2.90)

0.808

  ≥ 35

1.51(0.90–2.54)

0.115

2.14(0.85–5.39)

0.106

 Han

Ref

–

Ref

–

 Non-Han

2.05(1.24–3.40)

0.005

2.24(1.28–3.93)

0.005

 Not married

Ref

–

Ref

–

 Married

0.71(0.46–1.08)

0.109

0.58(0.27–1.25)

0.164

 Divorced or widowed

2.56(1.46–4.49)

0.001

1.46(0.58–3.64)

0.423

 Illiterate or elementary school

Ref

–

Ref

–

 Junior high school

1.06(0.68–1.65)

0.789

1.51(0.94–2.45)

0.090

 High school and above

1.67(0.86–3.25)

0.131

2.52(1.19–5.33)

0.016

  < $500

Ref

–

Ref

–

 $500–$1000

0.49(0.33–0.74)

0.001

0.47(0.29–0.74)

0.001

  > $1000

0.48(0.27–0.84)

0.010

0.29(0.16–0.55)

0.001

 Local city

Ref

–

Ref

–

 Other cities in this province

0.74(0.39–1.39)

0.348

0.77(0.39–1.50)

0.478

 Other provinces

0.30(0.17–0.53)

< 0.001

0.30(0.16–0.55)

0.001

 1 year and above

Ref

–

Ref

–

 6–12 months

0.42(0.25–0.70)

0.001

0.47(0.27–0.81)

0.006

  < 6 months

0.10(0.03–0.32)

< 0.001

0.14(0.04–0.45)

0.001

 Middle tier

Ref

–

Ref

–

 Low tier

4.06(1.47 ~ 11.18)

0.007

3.53(1.23 ~ 10.14)

0.019

1.04(1.01 ~ 1.07)

0.041

1.03(1.01 ~ 1.05)

0.043

 No

Ref

Ref

 Yes

1.41(0.93 ~ 2.13)

0.101

1.79(1.12 ~ 2.86)

0.016

 No

Ref

–

Ref

–

 Yes

3.50(2.38 ~ 5.16)

< 0.001

2.36(1.54 ~ 3.60)

< 0.001

 No

Ref

–

Ref

–

 Yes

1.86(1.12 ~ 3.09)

0.017

3.12(1.72 ~ 5.68)

0.002

 No

Ref

–

Ref

–

 Yes

5.44(3.66 ~ 8.09)

< 0.001

4.09(2.62 ~ 6.40)

< 0.001

 No

Ref

–

Ref

–

 Yes

5.32(3.57 ~ 7.92)

< 0.001

5.16(3.21 ~ 8.30)

< 0.001

 No

Ref

–

Ref

–

 Yes

6.82(4.5 ~ 10.33)

< 0.001

6.90(4.21 ~ 11.22)

< 0.001

 No

Ref

–

Ref

–

 Yes

0.57(0.33–1.01)

0.051

0.59(0.33–1.06)

0.076

 No

Ref

–

Ref

–

 Yes

3.60(2.11–6.15)

< 0.001

4.42(2.64–7.39)

< 0.001