Table 1 

Comparison of characteristics of patients infected with a subtype B virus and patients infected with a virus of the nonB subtypes. 

Subtype B 
NonB subtypes 
Multivariate Bin. Log. Regression 

Count (%) 
Count (%) 
pvalue 
ODDS ratio 
95% CI 
pvalue 



# Patients (n = 506) 
302 (59.7%) 
204 (40.3%) 



Homosexual transmission 
229/271 (84.5%) 
13/137 (9.5%) 
< 0.001 
33.1 
14.5  75.6 
< 0.001 
HBV^{+} 
106/296 (35.8%) 
82/195 (42.1%) 
0.164 
 

HCV^{+} 
26/295 (8.8%) 
8/197 (4.1%) 
0.042 
9.1 
1.5  56.2 
0.017 
Syphilis^{+} 
119/300 (39.7%) 
21/200 (10.5%) 
< 0.001 
 

Chlamydia^{+} 
106/259 (40.9%) 
21/126 (16.7%) 
< 0.001 
3.6 
1.4  9.6 
0.01 
Gender (male) 
279/302 (92.4%) 
94/204 (46.1%) 
< 0.001 
 

Caucasian origin 
285/299 (95.3%) 
68/202 (33.7%) 
< 0.001 
21.0. 
5.3  82.5 
< 0.001 
DRM 
25/302 (8.3%) 
8/204 (3.9%) 
0.052 
 

PHI 
60/275 (21.8%) 
12/189 (6.3%) 
0.021 
 



Median (IQR) 
Median (IQR) 
pvalue 



CD4^{+ }T cells (cells/μl) 
420 (284592) 
330 (182516) 
< 0.001 
 

Age (years) 
38.5 (3244) 
36 (3036) 
0.018 
 



Values are given as counts per number of patients for which data was available. For the multivariate analysis, odds ratios are given with regard to Subtype B infection. The pvalue for the HosmerLemeshow test for the multivariate model is 0.528. HBV, Hepatitis B virus; HCV, Hepatitis C virus; DRM, Drug resistant mutations; PHI, Primary HIV infection; IQR, interquartile range; CI, confidence interval. 

Chalmet et al. BMC Infectious Diseases 2010 10:262 doi:10.1186/1471233410262 