Table 2 Univariate and multivariate analyses of factors associated with HIV and syphilis infection among low-fee female sex workers in 12 cities in China, 2012-2013

Age (years)

 ≤ 40

44

9.6

1

1

11

2.4

1

1

 >40

73

22.7

2.8(1.9-4.2)

<0.0001

1.8 (1.2-2.9)

0.014

26

8.1

3.6(1.8-7.4)

0.0005

2.6(1.1-6.1)

0.0257

Marital status

 Married/cohabiting

77

13.3

1

1

23

7

1

 Single

40

20

1.6(1.1-2.5)

0.022

1.3(0.8-2.1)

0.2399

14

4

1.8(0.9-3.6)

0.0848

Years of schooling

 >5

21

9.1

1

1

9

3.9

1

 ≤5

96

17.4

2.1(1.3-3.5)

0.0036

1.5(0.9-2.6)

0.1212

28

5.1

1.3(0.6-2.8)

0.4849

Ethnicity

 Han ethnicity

62

13.1

1

22

4.7

1

 Minorities

55

17.9

1.4(1.0-2.1)

0.07

15

4.9

1.0(0.5-2.1)

0.8881

Household registration

 Non-Local

77

15.2

1

16

3.2

1

1

 Local

40

14.5

0.9(0.6-1.4)

0.7776

21

7.6

2.5(1.3-4.9)

0.0067

3.3(1.5-6.9)

0.0022

Province of employment ^a

 Guangxi

44

14.2

1

1

13

4.2

1

1

 Hunan

29

11.8

0.8(0.5-1.3)

0.0773

0.7(0.4-1.2)

0.0045

4

1.6

0.4(0.1-1.2)

0.0104

0.3(0.1-0.9)

0.0024

 Yunnan

44

19.6

1.5(0.9-2.3)

0.02

2.1(1.2-3.8)

0.0003

20

8.9

2.2(1.1-4.6)

0.0005

2.7(1.1-6.7)

0.0003

Had ever changed workplace

 Yes

9

9.2

1

3

3.1

1

 No

108

15.9

1.9(0.9-3.8)

0.0882

34

5

1.7(0.5-5.5)

0.4055

Length of being a FSW

 ≤ 2 year

64

13.3

1

17

3.5

1

 >2 year

53

17.6

1.4(0.9-2.1)

0.1042

20

6.6

1.9(1.0-3.8)

0.0505

Soliciting venues ^b

 Small hair/beauty salons/guesthouses, streets

48

10.3

1

1

14

3

1

1

 Self- rented rooms/“market day” buildings

76

21.9

2.4(1.6-3.6)

<0.0001

2.3(1.4-3.7)

0.0012

23

7.3

2.5(1.3-5.0)

0.0072

3.9(1.5-10.0)

0.0042

Price charged for vaginal sex

 20-50

79

12.5

1

1

22

3.5

1

1

 ≤20

38

25.7

2.4(1.6-3.8)

<0.0001

1.2(0.8-1.9)

0.4277

15

10.1

3.1(1.1-6.2)

0.001

2.2(0.9-5.2)

0.0907

Estimated average age of clients

 ≤50

68

18.9

1

1

18

5

1

 >50

49

11.6

1.8(1.8-2.6)

0.0046

1.2(0.8-1.9)

0.4277

19

4.5

1.1(0.6-2.2)

0.7375

Received HIV testing in the past year

 No

72

15.3

1

16

3.4

1

1

 Yes

45

14.6

0.9(0.6-1.4)

0.7913

21

6.8

2.1(1.1-4.0)

0.0316

1.4(0.7-3.0)

0.3737

Consistent condom use with clients in the past 30 days

 Yes

44

11.5

1

1

20

5.2

1

 No

73

18.2

1.7(1.1-2.6)

0.0092

1.6(1.0-2.6)

0.0431

17

4.2

1.2(0.6-2.4)

0.5119

Injection drug use in the past 6 months

 No

110

14.6

1

28

3.7

1

1

 Yes

7

23.3

1.8(0.7-4.2)

0.1992

9

30.9

11.0(4.6-21.3)

<0.0001

13.5(4.5-40.1)

<0.0001

Syphilis infection

 No

-

-

-

-

25

3.8

1

1

 Yes

-

-

-

-

12

10.3

2.9(1.4-6.0)

0.0035

1.6(0.7-3.6)

0.2439