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Table 4 Associations of potential risk factors with three different STI outcomes among MSM respondents of 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

Potential risk factors

Chlamydia N = 101

 

gonorrhoea N = 35

 

HIV

N = 42

 
 

Adjusted PR [95% CI]

p for trend

Adjusted PR [95% CI]

p for trend

Adjusted PR [95% CI]

p for trend

age groups (years)

 

0.002

 

0.255

 

0.932

16-25

ref. group

 

ref. group

 

ref. group

 

26-35

0.6 [0.4-1.1]

 

0.5 [0.2-1.6]

 

1.4 [0.6-3.2]

 

36-45

0.4 [0.2-0.9]

 

0.7 [0.2-2.3]

 

0.8 [0.3-2.1]

 

≥ 46

0.3 [0.1-0.7]

 

0.6 [0.1-2.2]

 

1.5 [0.6-3.8]

 

residing in Oslo or Akershus county

      

no

ref. group

 

ref. group

 

ref. group

 

yes

1.4 [1.0-2.1]

 

1.9 [0.9-4.1]

 

2.3 [1.2-4.6]

 

ethnic background:

      

Norwegian

ref. group

 

ref. group

 

ref. group

 

immigrant with western background

0.3 [0.0-1.8]

 

1.5 [0.4-6.1]

 

0.4 [0.0-3.0]

 

immigrant with non-western background

2.8 [1.4-5.7]

 

1.8 [0.5-6.1]

 

5.4 [1.9-15.3]

 

unknown

not included

 

5.9 [1.3-26.3]

 

not included

 

education

 

0.568

 

0.987

 

not

primary school or less

ref. group

 

ref. group

 

merged with ref. group

calculated

secondary school

0.6 [0.3-1.2]

 

1.7 [0.2-16.1]

 

ref. group

 

high school/university

0.5 [0.3-1.1]

 

1.6 [0.1-16.5]

 

0.8 [0.5-1.5]

 

annual income before tax in 1000 NOK* in 2005

 

0.204

 

0.380

 

0.102

< 150

ref. group

 

ref. group

 

ref. group

 

150-299

1.1 [0.6-1.9]

 

1.0 [0.4-2.5]

 

1.0 [0.4-2.7]

 

300-500

1.2 [0.6-2.1]

 

0.1 [0.0-0.6]

 

0.8 [0.3-1.9]

 

> 500

1.3 [0.6-2.9]

 

1.0 [0.3-2.9]

 

1.5 [0.6-4.3]

 

unknown

not included

 

not included

 

10.4 [1.5-71.4]

 

N of male sexual partners in life:

 

< 0.001

 

0.056

 

< 0.001

1-10

ref. group

 

ref. group

 

ref. group

 

11-50

4.0 [1.8-8.8]

 

2.4 [0.7-7.6]

 

3.0 [0.7-13.2]

 

51- > 500

4.4 [1.9-10.3]

 

4.5 [1.3-15.6]

 

13.9 [3.5-55.8]

 

N of male sexual partners in the past 6 months

 

0.308

 

0.065

 

0.544

0-2

ref. group

 

ref. group

 

ref. group

 

3-5

1.2 [0.6-2.2]

 

1.7 [0.6-4.9]

 

0.6 [0.2-1.8]

 

6-10

1.2 [0.7-2.3]

 

3.1 [1.1-8.8]

 

0.4 [0.1-1.5]

 

> 10

1.6 [0.8-3.2]

 

3.4 [1.0-11.3]

 

0.7 [0.2-2.3]

 

practice of threesome or group sex

      

no

ref. group

 

ref. group

 

ref. group

 

yes

1.5 [1.0-2.3]

 

0.8 [0.4-1.7]

 

1.0 [0.5-2.1]

 

received money for sex in the last year

      

no

ref. group

 

ref. group

 

ref. group

 

yes

0.9 [0.3-2.2]

 

2.3 [0.7-8.4]

 

1.9 [0.4-8.3]

 

paid for sex in the last year

      

no

ref. group

 

ref. group

 

ref. group

 

yes

1.6 [0.8-3.2]

 

1.2 [0.3-3.9]

 

0.6 [0.1-2.2]

 

unknown

not included

 

5.5 [0.4-82.7]

 

not included

 

how many times feeling drunk in a given month

 

0.409

 

0.283

 

< 0.001

< 1

ref. group

 

ref. group

 

ref. group

 

1

1.6 [0.7-4.0]

 

3.9 [0.9-16.8]

 

1.1 [0.4-2.7]

 

2-3

2.0 [0.9-4.5]

 

3.3 [0.8-12.9]

 

0.6 [0.2-1.3]

 

≥ 4

1.6 [0.7-3.5]

 

1.3 [0.3-5.0]

 

0.1 [0.0-0.3]

 

unsafe sex under the influence of alcohol in the past 12 months

      

no

ref. group

 

ref. group

 

ref. group

 

yes

1.8 [1.1-2.9]

 

1.9 [0.9-4.3]

 

1.5 [0.7-3.4]

 

under the influence of selected drugs** during sex in the past 12 months

      

no

ref. group

 

ref. group

 

ref. group

 

yes

0.8 [0.5-1.5]

 

1.7 [0.8-3.9]

 

5.2 [2.7-11.4]

 

ever had a date in reality with Internet partner

      

no

ref. group

 

not included

 

ref. group

 

yes

1.6 [0.5-5.0]

   

1.4 [0.4-4.6]

 

UAI*** with a casual or anonymous partner in the last 6 months

      

no

ref. group

 

ref. group

 

ref. group

 

yes

1.5 [0.9-2.4]

 

1.0 [0.5-2.2]

 

2.0 [0.9-4.6]

 
  1. * NOK - Norwegian crowns
  2. **selected drugs included: marihuana, prescription drugs, ecstasy, LSD, GHB, cocaine, heroine, amphetamines, methamphetamines
  3. *** UAI - unprotected anal intercourse
  4. Results represent three separate multivariable models with self-reported STI as outcomes. Different exclusion criteria were applied in these models, as described in the text and presented in the Table 1.