Table 4 Multivariate logistic regression, 2005–2017

Razor reuse

0.354

0.176

4.029

0.045

1.425

1.008

2.012

Ear piercing

0.803

0.210

14.586

0.000

2.232

1.478

3.370

Tattoo

1.035

0.448

5.328

0.021

2.814

1.169

6.774

Number of sex partner (control=0)

53.998

<0.0001

 One statilzed sex partner

-0.030

0.325

0.008

0.928

0.971

0.513

1.836

 ≥2

1.214

0.342

12.611

<0.0001

3.367

1.723

6.580

Condom (control=always)

6.911

0.032

 Occasional

0.057

0.229

0.061

0.805

1.058

0.675

1.658

 Never

0.480

0.228

4.419

0.036

1.616

1.033

2.528

Sexual contact with syphilis (control=yes)

42.577

<0.0001

 No

1.454

0.259

31.451

<0.0001

4.282

2.576

7.118

 Uncertain

2.160

0.650

11.052

0.001

8.674

2.427

31.001