Kudo’s pit pattern classification for colorectal neoplasms: A meta-analysis

Table 1 Main characteristics of the studies selected for meta-analysis

Ref.	Country	Type of study	Type of classification	Patients (n)	Polyps (n)	Type of endoscopy
Kiesslich et al[26]	Germany	Single center	Type I to Type V	100	283	Magnifying chromoendoscopy
Kiesslich et al[9]	Germany	Single center	Neoplastic/non-neoplastic	84	118	Magnifying chromoendoscopy
Liu et al[10]	China	Single center	Type I to Type V	948	954	Magnifying chromoendoscopy
Su et al[11]	China	Single center	Type I to Type V	230	270	Magnifying chromoendoscopy
Hurlstone et al[12]	United Kingdom	Single center	Neoplastic/non-neoplastic	350	288	Magnifying chromoendoscopy
Apel et al[19]	Germany	Single center	Neoplastic/non-neoplastic	158	273	Chromoendoscopy
Kato et al[13]	Japan	Single center	Neoplastic/non-neoplastic	180	210	Magnifying chromoendoscopy
Su et al[20]	China	Single center	Neoplastic/non-neoplastic	79	110	Chromoendoscopy
Chiu et al[14]	China	Single center	Neoplastic/non-neoplastic	133	180	Magnifying chromoendoscopy
Tischendorf et al[28]	Germany	Single center	Neoplastic/non-neoplastic	52	100	NBI magnifying endoscopy
Tischendorf et al[28]	Germany	Single center	Neoplastic/non-neoplastic	47	100	Magnifying chromoendoscopy
East et al[24]	United Kingdom	Single center	Type I to Type V	62	116	NBI magnifying endoscopy
Liu et al[15]	China	Single center	Neoplastic/non-neoplastic	223	451	Magnifying chromoendoscopy
Rogart et al[21]	United States	Single center	Neoplastic/non-neoplastic	131	265	NBI
van den Broek et al[23]	Netherlands	Single center	Neoplastic/non-neoplastic	50	98	NBI magnifying endoscopy
Togashi et al[16]	Japan	Single center	Neoplastic/non-neoplastic	50	107	Magnifying chromoendoscopy
dos Santos et al[17]	Brazil	Single center	Neoplastic/non-neoplastic	72	137	Magnifying chromoendoscopy
van den Broek et al[22]	Netherlands	Single center	Neoplastic/non-neoplastic	48	153	NBI
Chan et al[25]	United States	Single center	Neoplastic/non-neoplastic	43	103	i-SCAN
Dos Santos et al[18]	Brazil	Single center	Neoplastic/non-neoplastic	69	120	Magnifying chromoendoscopy
Schachschal et al[27]	Germany	Single center	Neoplastic/non-neoplastic	309	675	White light imaging, i-SCAN

NBI: Narrow band imaging.