Table 1.

Characteristics of the studied subjects from the CSS2 cancer screening study

N (total = 333)Percentage
Tobacco smoker
 Yes4212.6
 No29187.4
Gender
 Female16248.6
 Male17151.4
Balloon sampling device
 Chinese balloon16148.3
 Wilson-Cook balloon17251.7
Antibiotic usage within the last 3 months
 Yes4212.6
 No29187.4
Histologically diagnosed ESD
 Yes14242.6
 No19157.4
MeanSD
Age55.034.54
PGI/II ratio9.404.12
Number of genera22.936.11
Number of families16.933.26
Number of orders12.121.84
Number of classes10.021.19
Number of phyla5.370.72