Table 2 

Prevalence of lic1 locus copy number and licD alleles in NT H. influenzae and H. haemolyticus 

Genotype 
H. influenzae n = 88 (%) 
H. haemolyticus n = 109 (%) 
PR^{a} 
P value^{c} 


lic1 copy number 

0 
7 (8.0) 
63 (57.8) 
0.14 
< .0001 
1 
74 (84.0) 
46 (42.2) 
2.18 
< .0001 
2 
7 (8.0) 
0 (0)^{b} 
ND 
.0031 
single licD alleles 

licD_{I} 
40 (45.5) 
1 (0.92) 
49.5 
< .0001 
licD_{III} 
14 (15.9) 
23 (21.1) 
0.75 
.6647 
licD_{IV} 
20 (22.7) 
23 (21.1) 
1.07 
.3536 
dual licD alleles 

licD_{IV}licD_{III} 
4 (4.5) 
0 (0) 
ND 
.0383 
licD_{I}licD_{III} 
1 (1.1) 
0 (0) 
ND 
.4467 
licD_{I}licD_{IV} 
1 (1.1) 
0 (0) 
ND 
.4467 
licD_{I}licD_{I} 
1 (1.1) 
0 (0) 
ND 
.4467 


^{a }Prevalence ratios (PR) were calculated for H. influenzae using H. haemolyticus as the referent group. ^{b }Logit, 0.5 used in place of 0 for PR and statistical calculations. ^{c }P < 0.05 is considered statistically significant using χ^{2 }analysis. 

McCrea et al. BMC Microbiology 2010 10:286 doi:10.1186/1471218010286 