Randomized clinical study on diagnostic accuracy of magnified endoscopic examination with narrow band imaging (NBI) for small depressive lesion in the stomach

Randomized clinical study on diagnostic accuracy of magnified endoscopic examination with narrow band imaging (NBI) for small depressive lesion in the stomach - NBI study for gastric small lesion

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000001072

Enrollment

1100

Registered

2008-03-15

Start date

2008-06-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Gastric cancer

Interventions

Magnified endoscopic examination with NBI system Conventional non-magnified examination without NBI system

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: (a)Depressive undiagnosed lesion within 10mm in length without ulceration or erosion in the stomach (b)Written informed consent (3)20<=age

Exclusion criteria

Exclusion criteria: (a)Pathologically diagnosed lesion (b)The history of surgical gastric resection (c)Severe concomitant disease (d)User of anti-coagulant (e)Any other inappropriate condition for participating this study estimated by physician

Design outcomes

Primary

Measure	Time frame
Diagnostic accuracy	—

Secondary

Measure	Time frame
(1)Diagnostic sensitivity (2)Diagnostic specificity (3)Time required for confirming the endoscopic diagnosis (4)Added efficacy of magnified examination with NBI on conventional non-magnified examination without NBI (5)Frequency of endoscopically inconclusive lesions	—

Countries

Japan

Contacts

Public ContactYasumasa Ezoe

Graduate school of medicine, Kyoto University Department of multidisciplinary cancer treatment

yasuzoe@kuhp.kyoto-u.ac.jp075-751-4319

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026