# Factors That Impact the Relationship Between Pulmonary Status and Actual Electronic Cigarette Use

> **NCT04135404** · — · COMPLETED · sponsor: **University of Alabama at Birmingham** · enrollment: 400000 (actual)

## Conditions studied

- Electronic Cigarette Use
- Pulmonary Disease

## Interventions

- **OTHER:** health-related telephone surveys

## Key facts

- **NCT ID:** NCT04135404
- **Lead sponsor:** University of Alabama at Birmingham
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2017-01-01
- **Primary completion:** 2017-12-30
- **Final completion:** 2017-12-30
- **Target enrollment:** 400000 (ACTUAL)
- **Last updated:** 2019-10-22


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04135404

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04135404, "Factors That Impact the Relationship Between Pulmonary Status and Actual Electronic Cigarette Use". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04135404. Licensed CC0.

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