Table 2.

Association between relative abundance of Prevotella and clinicopathological factors.

Variables	Relative abundance (+/−SE)	P
Age
<  = 65y (29)	0.16 ± 0.02	Reference
> 65y (36)	0.14 ± 0.02	0.32
Gender
Female (15)	0.18 ± 0.03	Reference
Male (50)	0.14 ± 0.02	0.54
Smoking history
Non smoker (16)	0.20 ± 0.03	Reference
Past or current smoker (46)	0.13 ± 0.17	0.035
Drinking history
Non drinker (18)	0.17 ± 0.03	Reference
Past or current drinker (42)	0.14 ± 0.01	0.57
Cancer occurrence
Cancer free (20)	0.22 ± 0.02	Reference
Cancer (45)	0.12 ± 0.01	< 0.0001

Statistical analysis was performed using the Mann–Whitney U test.

Significant results were expressed as bold characters.

Drinking and smoking history were not determined for 5 and 3 patients, respectively.