A multicenter cohort study to elucidate the effect of endoscopic polypectomy on the incidence of colorectal cancer- the Japan Polyp Study Cohort

A multicenter cohort study to elucidate the effect of endoscopic polypectomy on the incidence of colorectal cancer- the Japan Polyp Study Cohort - Japan Polyp Study (JPS) Cohort

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000040731

Enrollment

2000

Registered

2020-06-12

Start date

2008-09-01

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

Colorectal cancer

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Japan Polyp Study enrolled patients who are considered to be available until the completion of the cohort study

Exclusion criteria

Exclusion criteria: 1. Informed Consent (IC) refusal example 2. Subjects with serious comorbidities (active other organ cancer, severe chronic heart failure, renal failure, liver failure, etc.) 3. When the doctor in charge determines that the registration for this study is inappropriate

Design outcomes

Primary

Measure	Time frame
Incidence of invasive cancer at 6, 9 and 12 years after clean colon (Complete removal of colorectal neoplasia)	—

Secondary

Measure	Time frame
1) Incidence of index lesions (ILs: large adenoma >10 mm, high-grade adenoma, cancer) at 6, 9 and 12 years after clean colon (Complete removal of colorectal neoplasia) 2) Effect of reduction for colorectal cancer mortality by endoscopic polypectomy	—

Countries

Japan

Contacts

Public ContactMika Mori

National Cancer Center Hospital, Tokyo Cancer Screening Center/ Endoscopy Division

mmori@ncc.go.jp0335422511

Outcome results