. Author manuscript; available in PMC: 2015 May 1.

Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2014 Apr 3;23(5):735–741. doi: 10.1158/1055-9965.EPI-13-0855

Table 2.

Associations between upper digestive tract microbial richness or β-diversity metrics and PGI/II ratio in the Cytology Sampling Study 2

	Adjusted Model^a		Model Further adjusted for ESD^b		Interaction ESD*PGI/II^b
	coefficient	P value	coefficient	P value	P value
Microbial richness
No. of genera	0.029±0.013	0.034	0.025±0.013	0.059	0.029
β-diversity
PC1	−0.038±0.013	0.004	−0.035±0.013	0.009	0.081
PC2	0.013±0.014	0.346	0.015±0.014	0.287	0.904
PC3	0.034±0.013	0.009	0.034±0.013	0.011	0.833

linear regression model adjusted for smoking, gender, age, balloon sampling device and antibiotic usage in the last three months.

linear regression model further adjusted for ESD besides smoking, gender, age, balloon sampling device and antibiotic usage in the last three months.