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. 2014 Jan 6;14:3. doi: 10.1186/1471-2458-14-3

Table 2.

Exposure risks with significant associations comparing HCV antibody positive and negative men who have sex with men from Zurich, stratified by HIV diagnosis

Factor (exposure risk)
HCV pos. 1
HCV neg.
Fisher’s 2 OR 3 95% CI 4 of OR
(Without substitution of missing values) n % n %
HIV5diagnosis
 
 
 
 
 
 
 
 
Total sample (n = 840)
Yes
4
21.1
15
78.9
0.000
72.70
14.95-353.56
No
3
0.4
818
99.6
Non-Swiss origin
 
 
 
 
 
 
 
 
Total sample (valid n = 769)
Yes
5
2.8
173
97.2
0.009
8.51
1.64-18.75
No
2
0.3
589
99.7
No known HIV infection (valid n = 752)
Yes
1
0.6
171
99.4
0.542
1.69
0.15-18.75
No
2
0.3
578
99.7
HIV diagnosed (valid n = 17)
Yes
4
66.7
2
33.3
0.006
n.a.7
 
No
0
0.0
11
100.0
Tattooed
 
 
 
 
 
 
 
 
Total sample (valid n = 727)
Yes
5
3.4
140
96.6
0.004
10.36
1.99-53.94
No
2
0.3
580
99.7
No known HIV infection (valid n = 710)
Yes
2
1.4
137
98.6
0.100
8.32
0.75-92.43
No
1
0.2
570
99.8
HIV diagnosed (valid n = 17)
Yes
3
50.0
3
50.0
0.099
10.00
0.74-135.33
No
1
9.1
10
90.9
NIDU6of cocaine or amphetamines NIDU only
 
 
 
 
 
 
 
 
Total sample (valid n = 727)
Yes
4
4.0
95
96.5
0.012
8.77
1.93-39.81
No
3
0.5
625
99.5
No known HIV infection (valid n = 710)
Yes
0
0.0
91
100.0
0.621
n.a.
 
No
3
0.5
616
99.5
HIV diagnosed (valid n = 17) Yes
4
50.0
4
50.0
0.053 n.a.  
No 0 0.0 9 100.0

1HCV pos./neg.: positive/negative for antibodies against hepatitis C virus; 2Fisher’s exact test; 3OR: odds ratio; 4CI: confidence interval; 5HIV: human immunodeficiency virus; 6NIDU: non-injection drug use; 7n.a.: not applicable (division by zero).