# Controlled Exposure of Healthy Nonsmokers to Secondhand and Thirdhand Cigarette Smoke

> **NCT04013256** · NA · SUSPENDED · sponsor: **University of California, San Francisco** · enrollment: 66 (estimated)

## Conditions studied

- Pollution; Exposure
- Smoke Inhalation
- Exposure to Pollution

## Interventions

- **OTHER:** Cigarette Smoke
- **OTHER:** Clean Air and Clean Clothing/Sham exposure

## Key facts

- **NCT ID:** NCT04013256
- **Lead sponsor:** University of California, San Francisco
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** SUSPENDED
- **Start date:** 2020-01-20
- **Primary completion:** 2024-10-31
- **Final completion:** 2024-10-31
- **Target enrollment:** 66 (ESTIMATED)
- **Why stopped:** The human exposure facility was closed by the University.
- **Last updated:** 2023-08-28

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04013256

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04013256, "Controlled Exposure of Healthy Nonsmokers to Secondhand and Thirdhand Cigarette Smoke". Retrieved via AI Analytics 2026-05-26 from https://api.ai-analytics.org/clinical/NCT04013256. Licensed CC0.

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