Role of digital single-operator cholangioscopy in the diagnosis and treatment of biliary disorders

Table 1 Studies, evaluating the role of digital single-operator cholangioscopy in defining biliary strictures

Author	Yr	Design	Patients	Visual impression (sensitivity and specificity)	Histology (sensitivity and specificity)
Shah et al[8]	2017	Single center	77	97%, 96%	81%
Navaneethan et al[10]	2016	Multicenter	44	90%, 95.8%	85%, 100%
Varadarajulu et al[17]	2016	Single center	31	-	100%, 88.9
Turowski et al[11]	2018	Multicenter	99	95.5%, 94.5%	57.7%, 100%
Lenze et al[18]	2018	Single center	41	88.9%, 97.6%	62.5%, 90.0%