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

From: Self-reported sexually transmitted infections and their correlates among men who have sex with men in Norway: an Internet-based cross-sectional survey

Demographic characteristics respondents
N = 2430 (%)
Chlamydia*
N= 101 (%)
Crude PR
Chlamydia
[95% CI]
gonorrhoea
N = 35 (%)
Crude PR
gonorrhoea
[95% CI]
HIV
N = 42 (%)
Crude PR HIV
[95% CI]
Syphilis
N = 17 (%)
Crude PR
syphilis
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  
  1. * only those, who reported Chlamydia as a single STI infection in the past 12 months, were included in this group
  2. ** NOK - Norwegian crowns
  3. Proportion of MSM, reporting Chlamydia, gonorrhoea, HIV infection or syphilis in the previous 12 months and their crude associations