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Table 2 Factors associated with syphilis and HCV infection among club drug users in Shandong, China

From: Syndemics of syphilis, HCV infection, and methamphetamine use along the east coast of China

Factors

Syphilis infection(n=77)

HCV infection (n=30)

Unprotected sex

%

OR(95% CI)

AOR(95% CI)

%

OR(95% CI)

AOR(95% CI)

%

OR(95% CI)

AOR(95% CI)

Gender

         

 Male

7.9

1.0

1.0

3.9

1.0

 

37.6

1.0

1.0

 Female

17.5

2.5(1.5-4.2)**

2.8(1.2-6.5)*

2.8

0.7(0.2-2.0)

 

53.3

3.0(1.8-5.1)**

2.9(1.7-4.9)**

Education

         

 Middle school or lower

9.5

1.0

 

2.9

1.0

 

58.5

3.7(2.3-5.9)**

3.4(2.0-5.5)**

 High school or higher

9.7

1.0(0.6-1.7)

 

5.2

1.8(0.9-3.8)

 

27.4

1.0

1.0

Had ever injected

        

 Yes

8.7

0.9(0.4-1.9)

 

9.8

3.6(1.6-8.1)**

2.7(1.1-6.5)*

44.0

0.8(0.4-1.7)

 

 No

9.7

1.0

 

2.9

1.0

1.0

50.3

1.0

 

Had ever sex with regular sex partners in last year

      

 Yes

8.8

0.1(0.1-0.6)**

0.2(0.1-0.6)**

3.6

     

 No

42.9

1.0

 

0.0

     

Had ever sex with commercial sex partners in last year

    

 Yes

11.6

1.7(1.0-2.7)*

2.0(1.0-3.9)*

3.1

0.7 (0.5-1.2)

    

 No

7.3

1.0

1.0

4.5

1.0

    

Ever received intervention

       

 Yes

10.8

1.0

 

3.8

1.0

 

34.1

1.0

1.0

 No

9.3

0.9(0.5-1.6)

 

3.7

1(0.4-2.6)

 

53.8

2.3(1.4-3.7)**

2.1(1.2-3.6)*

HCV infection

         

 Yes

36.7

6.2(2.8-13.6)**

12.1(4.1-20.3)**

   

42.9

0.9(0.4-1.9)

 

 No

8.5

1.0

1.0

   

45.4

1.0

 

Syphilis

        

 Yes

   

14.3

6.2(2.8-13.6)**

8.0(3.5-18.0)**

56.2

3.0(1.8-5.1)**

4.2(2.4-7.4)**

 No

   

2.6

1.0

 

27.9

1.0

1.0

  1. OR: Odds ratio; AOR: Adjusted odds ratio, controlled factors included study sites, age, sex, residency, ethnicity, education, marital status, sexual behavior, HIV-related prevention services; CI: Confidence interval; NA: Not applicable; * P < 0.05; ** P < 0.01.