NCT07414355Completed
Switching to E-Cigarettes After Type 2 Diabetes Diagnosis and Health Outcomes
Clinical Outcomes Associated With Switching From Combustible Cigarettes to Electronic Cigarettes Among Adults With Newly Diagnosed Type 2 Diabetes: A Nationwide Retrospective Cohort Study
Source: ClinicalTrials.gov · Last updated 8 Oct 2026
Brief summary (registry, in English)
Individuals with T2DM who smoke have higher risks of cardiovascular disease and other complications. Many people consider e-cigarette as a "harm-reduction" alternatives to combustible cigarettes, but it is not clear whether switching to e-cigarettes improves health outcomes in patients with diabetes.
- Status (registry)
- Completed
- Study type
- Observational
- Enrollment
- 133320 (actual)
- First submitted
- 22 Jan 2026
- Start date
- 1 Jan 2018
- Primary completion date
- 31 Dec 2023
- Lead sponsor
- Samsung Medical Center
- Diseases
- Type 2 diabetes
- NCT number
- NCT07414355
What you commit to
- Study type: Observational
- Participants enrolled: 133320
- From 1 Jan 2018 to the primary completion date, 31 Dec 2023
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Other illness
- Pre-existing AMI before diabetes diagnosis
- Pre-existing Revascularization before diabetes diagnosis
- Pre-existing diabetes complications before diabetes diagnosis
- Pre-existing cancer before diabetes diagnosis
- Death within 6 months of the first health examination after diabetes diagnosis
- Cancer within 6 months of the first health examination after diabetes diagnosis
Age
- age \<40 years or ≥75 years
Who the study is looking for
- Patients diagnosed with diabetes who reported being a "current smoker" at a health examination within the 4 years prior to the diabetes diagnosis.
Age in the registry: 40 years to 75 years · Sex: All · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Samsung Medical Center Coordinator of this site? Confirm its status | Seoul | South Korea | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.