Statistical analysis

FG F. Grillo
MP M. Paudice
AG A. Gambella
SB S. Bozzano
SS S. Sciallero
AP A. Puccini
SL S. Lastraioli
MD M. Dono
PP P. Parente
AV A. Vanoli
VA V. Angerilli
MF M. Fassan
LM L. Mastracci
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Descriptive statistics was applied to demographic and histologic characteristics, including median and range of number of biopsies per patient/median and range of biopsies with invasive cancer. Differences in staining intensity and patchiness between immunostains and between endoscopic biopsies and surgical specimens for each stain were calculated using the chi-squared test. A cut-off of p < 0.05 indicated a significant difference between groups.

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