Table 3.

Results with autofluorescence (AF) and methylene blue (MB) staining compared with histological findings as the reference standard in the 35 patients with Barrett’s osophagus (BO); the results of video endoscopy (VE) alone are also shown (with respect to the respective accuracy achieved, no statistically significant differences were found among the different methods used)

Histolopathological diagnosis* per patient	n	Method	AF	MB	VE alone
Cancer	8	True positive	3 (38%)	6 (75%)	7 (88%)
HGD	1	True positive	1 (100%)	1 (100%)	1 (100%)
LGD	8	True positive	3 (38%)	3 (38%)	4 (50%)
Normal BO	18	True negative	14 (78%)	9 (50%)	11 (61%)

*Most advanced diagnoses per patient—that is, a patient with 10 normal biopsies, four LGD, and one HGD is a “HGD patient”.

HGD, high grade dysplasia; LGD, low grade dysplasia.