Variation of treatment decision-making for laryngeal cancer in Japan a retrospective observational study using a nationalwide database

Treatment of laryngeal cancer in Japan - Treatment of laryngeal cancer in Japan

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000041785

Enrollment

400

Registered

2020-09-15

Start date

2019-10-31

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

Laryngeal cancer

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients were identified using Diagnosis Procedure Combination (DPC) data, and target ICD-10 (C320, C321, C322, C329)

Exclusion criteria

Exclusion criteria: T4, N3, or M1 cases, as well as patients with unclear T stage, were excluded. Patients who had surgeries with Japanese procedure code C112 (tracheostomy), K394-2 (laryngectomy), K395 (pharyngolaryngectomy), K403-2-4 (laryngotracheal separation), and K403-2-3 (total laryngectomy for aspiration) before the index date, were also excluded.

Design outcomes

Primary

Measure	Time frame
Type of initial treatment	—

Secondary

Measure	Time frame
Regimens of radiotherapy	—

Countries

Japan

Contacts

Public ContactTakashi Fujiwara

Kurashiki Central Hospital Otolaryngology

t.fujiwarabi@gmail.com086-422-0210

Outcome results