Table 2 Factors associated with genital chlamydia infection among men and women aged 18–25 years in Rogaland, Norway

Men

Presence of a local youth clinic

<0.001

Yes

20/307

1

Reference

1

Reference

No

5/15

7.2

2.2-23.0

8.6

2.2-33.5

Do not know

6/283

0.3

0.1-0.8

0.3

0.1-0.7

Using youth clinic’s services

0.066

Yes

2/66

1

Reference

1

Reference

No

29/539

1.8

0.4-7.8

4.1

0.9-19.1

Number of partners during last year

<0.001

0

1/24

6.5

0.6-74.9

6.2

0.5-78.2

1

2/303

1

Reference

1

Reference

2-3

11/154

11.6

2.5-52.9

11.2

2.4-52.5

4-5

9/66

23.8

5.0-112.9

28.6

5.8-142.0

More than 5

8/58

24.1

5.0-116.7

30.5

6.0-155.5

Women

Previously diagnosed with Chlamydia

Yes

19/152

1

Reference

1

Reference

<0.001

No

35/778

0.3

0.2-0.6

0.3

0.2-0.6

Previously diagnosed with genital warts

Yes

1/64

1

Reference

1

Reference

0.071

No

53/866

4.1

0.6-20.2

6.5

0.8-49.1

Consulting family doctor on STI

Yes

18/352

1

Reference

1

Reference

0.027

No

36/578

1.2

0.7-2.2

2.1

1.1-4.2

Number of partners during last year

0

0/15

-

-

-

-

<0.001

1

15/563

1

Reference

1

Reference

2-3

19/222

3.4

1.7-6.9

3.2

1.6-6.5

4-5

12/83

6.2

2.8-13.7

6.5

2.8-14.7

More than 5

8/48

7.3

2.9-18.3

7.9

3.0-20.6