Table 2 Demographic characteristics of MSM respondents in the Internet-based cross-sectional study.

age groups (years)

16-25

768 (31.6)

37 (36.6)

ref. group

16 (45.7)

ref. group

7 (16.7)

ref. group

3 (17.6)

ref. group

26-35

769 (31.6)

35 (34.6)

0.9 [0.6-1.5]

8 (22.9)

0.5 [0.2-1.2]

15 (35.7)

2.1 [0.9-5.2]

6 (35.3)

2.0 [0.5-8.0]

36-45

551 (22.7)

22 (21.8)

0.8 [0.5-1.4]

8 (22.9)

0.7 [0.3-1.6]

11 (26.2)

2.2 [0.8-5.6]

5 (29.4)

2.3 [0.6-10.0]

≥ 46

342 (14.0)

7 (6.9)

0.4 [0.2-0.9]

3 (8.6)

0.4 [0.1-1.4]

9 (21.4)

2.9 [1.1-7.7]

3 (17.6)

2.2 [0.4-11.1]

health region of residence

East

1415 (58.2)

70 (69.3)

ref. group

26 (74.3)

ref. group

36 (85.7)

ref. group

15 (88.2)

ref. group

West

369 (15.2)

16 (15.8)

0.9 [0.5-1.5]

5 (14.3)

0.7 [0.3-1.9]

1 (2.4)

0.1 [0.0-0.8]

0

South

254 (10.4)

7 (6.9)

0.6 [0.3-1.2]

2 (5.7)

0.4 [0.1-1.8]

2 (4.8)

0.3 [0.1-1.3]

2 (11.8)

0.7 [0.2-3.2]

Mid-Norway

236 (9.7)

7 (6.9)

0.6 [0.3-1.3]

2 (5.7)

0.5 [0.1-1.9]

1 (2.4)

0.2 [0.0-1.2]

0

North

151 (6.2)

1 (1.0)

0.1 [0.2-0.9]

0

2 (4.8)

0.5 [0.1-2.1]

0

unknown

5 (0.2)

0

0

0

0

residing in Oslo/Akershus

county

no

1200 (49.4)

38 (37.6)

ref. group

11 (31.4)

ref. group

10 (23.8)

ref. group

4 (23.5)

ref. group

yes

1225 (50.4)

63 (62.4)

1.6 [1.1-2.4]

24 (68.6)

2.1 [1.0-4.3]

32 (76.2)

3.1 [1.5-6.3]

13 (11.8)

3.1 [1.5-6.3]

unknown

5 (0.2)

0

0

0

0

ethnic background:

Norwegian

2265 (93.2)

95 (94.1)

ref. group

30 (85.7)

ref. group

37 (88.1)

ref. group

13 (76.5)

ref. group

western background

90 (3.7)

1 (1.0)

0.3 [0.0-1.9]

2 (5.7)

1.7 [0.4-6.9]

1 (2.4)

0.7 [0.1-4.9]

1 (5.9)

1.9 [0.2-14.6]

non-western background

41 (1.7)

5 (4.9)

2.9 [1.2-6.8]

1 (2.9)

1.8 [0.3-13.2]

3 (7.1)

4.5 [1.4-13.9]

2 (11.8)

8.5 [2.0-36.5]

unknown

34 (1.4)

0

2 (5.7)

4.4 [1.1-17.8]

1 (2.4)

1.8 [0.2-12.7]

1 (5.9)

5.1 [0.7-38.1]

education

primary school or less

121 (5.0)

6 (5.9)

ref. group

2 (5.7)

ref. group

1 (2.4)

ref. group

1 (5.9)

ref. group

secondary school

903 (37.2)

36 (35.6)

0.8 [0.3-1.9]

16 (45.7)

1.1 [0.3-4.6]

15 (35.7)

2.0 [0.3-15.1]

5 (29.4)

0.7 [0.1-5.7]

high school/university

1401 (57.6)

59 (58.4)

0.8 [0.4-1.9]

17 (48.6)

0.7 [0.2-3.1]

26 (62)

2.2 [0.3-16.4]

11 (64.7)

0.9 [0.1-7.3]

unknown

5 (0.2)

0

0

0

0

income before tax in 1000

NOK** in 2005

< 150

670 (27.6)

24 (23.8)

ref. group

12 (34.3)

ref. group

5 (11.9)

ref. group

4 (23.5)

ref. group

150-299

573 (23.6)

22 (21.8)

1.1 [0.6-1.9]

11 (31.4)

1.1 [0.5-2.4]

8 (19.0)

1.9 [0.6-5.7]

4 (23.5)

1.2 [0.3-4.6]

300-500

854 (35.3)

37 (36.6)

1.2 [0.7-2.0]

3 (8.6)

0.2 [0.1-0.7]

18 (42.9)

2.8 [1.0-7.6]

4 (23.5)

0.9 [0.2-3.2]

> 500

323 (13.3)

18 (17.8)

1.5 [0.9-2.8]

8 (22.9)

1.4 [0.6-3.3]

10 (23.8)

4.1 [1.2-12.0]

5 (29.4)

2.6 [0.7-9.6]

unknown

10 (0.4)

0

1 (2.9)

5.6 [0.8-38.9]

1 (2.4)

13.4 [1.7-104.5]

0