Table 2 Logistic regression analyses of factors associated with HIV and syphilis co-infection (compared with the non-infected individuals)

<25

9 (14.5)

53 (85.5)

1

1

≥25

61 (18.9)

262 (81.1)

1.37 (0.64–2.93)

1.82 (0.71–4.64)

Han

64 (17.8)

296 (82.2)

1

1

Other minorities

6 (24.0)

19 (76.0)

1.46 (0.56–3.80)

2.00 (0.65–6.15)

Married

13 (14.9)

74 (85.1)

1

1

Unmarried

57 (19.1)

241 (80.9)

1.35 (0.70–2.59)

1.64 (0.69–3.89)

≤Junior middle school

24 (22.2)

84 (77.8)

1

1

>Junior middle school

46 (16.6)

231 (83.4)

0.69 (0.40–1.21)

0.91 (0.47–1.79)

Yes

8 (20.5)

31 (79.5)

1

1

No

62 (17.9)

284 (82.1)

0.85 (0.37–1.93)

0.94 (0.35–2.52)

≤3000

32 (21.9)

114 (78.1)

1

3001–5000

22 (16.3)

113 (83.7)

0.69 (0.38–1.27)

0.62 (0.30–1.28)

>5000

16 (15.4)

88 (84.6)

0.65 (0.33–1.26)

0.61 (0.26–1.40)

>2

14 (10.8)

116 (89.2)

1

1

1–2

11 (19.6)

45 (80.4)

2.03 (0.86–4.79)

2.34 (0.81–6.78)

<1

45 (22.6)

154 (77.4)

2.42 (1.27–4.62)*

2.80 (1.30–6.05)*

Yes

48 (18.5)

212 (81.5)

1

1

No

22 (17.6)

103 (82.4)

0.94 (0.54–1.65)

0.83 (0.41–1.68)

≥18

50 (15.5)

272 (84.5)

1

1

<18

20 (31.7)

43 (68.3)

2.53 (1.38–4.66)*

2.78 (1.29–5.89)*

Yes

53 (19.5)

219 (80.5)

1

1

No

17 (15.0)

96 (85.0)

0.73 (0.40–1.33)

0.74 (0.35–1.54)

≤2

22 (13.8)

137 (86.2)

1

1

3–5

29 (26.6)

80 (73.4)

2.26 (1.21–4.19)*

2.54 (1.19–5.40)*

>5

19 (16.2)

98 (83.8)

1.21 (0.62–2.35)

1.17 (0.52–2.61)

Insertive

13 (8.0)

149 (92.0)

1

1

Receptive

29 (37.2)

49 (62.8)

6.78 (3.27–14.07)*

6.87 (3.02–15.61)*

Both

26 (19.8)

105 (80.2)

2.84 (1.39–5.78)*

3.65 (1.64–8.09)*

Yes

19 (11.4)

148 (88.6)

1

1

No

48 (24.0)

152 (76.0)

2.46 (1.38–4.38)*

2.13 (1.08–4.19)*

<6

50 (18.5)

220 (81.5)

1

1

≥6

20 (17.4)

95 (82.6)

0.92 (0.52–1.84)

0.91 (0.47–1.79)