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Table 1 Socio-demographic and behavioural characteristics and STI (chlamydia, gonorrhoea, syphilis or HIV) positivity rate by age group in consultations in MSM visiting STI clinics, the Netherlands, 2006-2012

From: Increasing sexually transmitted infection rates in young men having sex with men in the Netherlands, 2006–2012

Characteristics 15-24 yrs (n = 16,603; STI positivity =18.6%) ≥ 25 yrs (n = 82,502; STI positivity =17.7%)
  N (%) STI positivity (%) N (%) STI positivity (%)
Age, years     
15-19 3023 (18.2) 16.4   
20-24 13580 (81.8) 19.1   
25-34    28550 (34.6) 19.5
35-44    26932 (32.6) 18.3
45-54    17871 (21.7) 16.5
≥55    9149 (11.1) 12.9
Sexual behaviour     
Sex with both men and women 2700 (16.3) 16.4 16391 (19.9) 12.9
Sex with men only 13903 (83.7) 19.0 66111 (80.1) 18.9
Ethnicity     
Dutch 12657 (76.2) 17.0 64657 (78.4) 17.0
Surinam/Antilles 854 (5.1) 28.3 2351 (2.9) 23.5
Turkey/Morocco 373 (2.3) 19.6 1291 (1.6) 20.4
Eastern Europe 486 (2.9) 27.6 1425 (1.7) 21.7
Sub-Sahara Africa 167 (1.0) 23.4 449 (0.5) 24.3
Latin America 359 (2.2) 29.8 1871 (2.3) 22.0
Asia 551 (3.3) 18.5 2633 (3.2) 22.1
Other 1156 (7.0) 20.9 7825 (9.5) 18.2
Previous HIV test     
No 6123 (36.9) 16.5 12785 (15.5) 18.8
Yes 10043 (60.5) 20.0 67622 (82.0) 17.6
Unknown 437 (2.6) 13.7 2095 (2.5) 16.2
Previous STI     
No 12618 (76.0) 17.4 60215 (73.0) 16.1
Yes 1915 (11.5) 28.8 12150 (14.7) 24.9
Unknown 2070 (12.5) 16.2 10137 (12.3) 18.6
CSW     
No 15822 (95.3) 18.3 80153 (97.2) 17.8
Yes, in past 6 months 592 (3.6) 29.7 1386 (1.7) 16.9
Unknown 189 (1.1) 7.4 962 (1.2) 10.3
Client of CSW     
No 16281 (98.1) 18.7 79640 (96.5) 18.0
Yes, in past 6 months 149 (0.9) 18.8 1988 (2.4) 9.5
Unknown 173 (1.0) 8.7 874 (1.1) 12.0
Nr of partners in < 6 months    
0-1 2884 (17.4) 13.6 8342 (10.1) 12.9
2-10 9581 (57.7) 18.9 40959 (49.7) 17.1
>10 992 (6.0) 31.1 10751 (13.0) 20.4
Unknown 3146 (18.9) 19.0 22450 (27.2) 19.4
STI symptoms     
No 11134 (67.1) 14.9 50728 (61.5) 13.6
Yes 3076 (18.5) 34.0 17607 (21.3) 28.7
Unknown 2393 (14.4) 16.1 14167 (17.2) 19.0
Notified     
No 12239 (73.7) 16.2 58147 (70.5) 15.5
Yes 1992 (12.0) 36.0 9764 (11.8) 29.0
Unknown 2372 (14.3) 16.3 14591 (17.7) 19.4
STI positivity     
Chlamydia 1627 (9.9) - 7292 (8.9) -
Gonorrhoea 1465 (9.0) - 6078 (7.5) -
Infectious syphilis 272 (1.7) - 1867 (2.3) -
HIV 246 (1.5) - 1778 (2.4) -