Narrow-band imaging versus white light for detection of diminutive colorectal adenoma using wide-view and high-definition colonoscope (HQ290ZI): A randomized controlled trial

Narrow-band imaging versus white light for detection of diminutive colorectal adenoma using wide-view and high-definition colonoscope (HQ290ZI): A randomized controlled trial - Narrow-band imaging versus white light for detection of diminutive colorectal adenoma using wide-view and high-definition colonoscope (HQ290ZI): a randomized controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000017083

Enrollment

450

Registered

2015-04-09

Start date

2015-04-13

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

colorectal adenoma

Interventions

narrow-band imagaing white light

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: First colonoscopy patient patient who has been tereated all colorectal polyps in the past colonoscopy

Exclusion criteria

Exclusion criteria: history of surgical resection for colorectum inflammatory bowel deisease Lynch syndrome hereditary colorectal polyposis active intestinal bleeding colorectal stenosis colorecatl diverticulosis toxicic mega-colon unsuccess of cecal insertion poor colon creansing antithrombotic drug melanosis of colorectum

Design outcomes

Primary

Measure	Time frame
Comparison of narrow-band imaging versus white light imaging for diminutive adenoma detection rate	—

Countries

Japan

Contacts

Public ContactAtsushi Katagiri

Showa University, Northern Yokohama Hospital Digestive Disease Center

katsushi0324@hotmail.com+81-45-949-7000

Outcome results

None listed

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