Trial · NCT07914010
Reducing Exposure With Air Cleaners and Technology
NCT07914010, Not applicable, Not yet recruiting, University of California, Berkeley
3 sourcestrials-2026-11-12-0.4.0
Cite this record
ConductScience Library. Reducing Exposure With Air Cleaners and Technology. Trials, record NCT07914010. Release trials-2026-11-12-0.4.0, 12 Nov 2026. https://conductscience.org/library/trials/NCT07914010
On this page
Trial
As registered on ClinicalTrials.gov, in the graph's capture of the registry.
- Title
- Reducing Exposure With Air Cleaners and Technology
- NCT number
- NCT07914010
- Status
- Not yet recruiting
- Phases
- Not applicable
- Enrollment
- 100 participants, estimated
- Lead sponsor
- University of California, Berkeley
- Conditions
- Asthma, COPD (Chronic Obstructive Pulmonary Disease)
- Interventions
- Air Cleaner, PM2.5 Monitor with Visual Air Quality Indicator, Educational Materials, Air Cleaner Technical Assistance
- First posted
- 2026-11-03
- Last updated
- 2026-11-05
Source ClinicalTrials.gov
Registered outcomes4
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Air Quality: Absolute Change in Daily Average Indoor Fine Particulate Matter (PM2.5) Concentration | Baseline (Days 1-30), initial intervention (Days 31-60), and targeted technical assistance (Days 61-90) | Indoor PM2.5 concentrations, measured continuously using PurpleAir monitors and expressed in micrograms per cubic meter (µg/m³), will be summarized as daily averages. To evaluate the impact of the air cleaner intervention on air quality, absolute changes in daily average PM2.5 concentrations (µg/m³) will be assessed across the baseline (30 days) and air-cleaner intervention (60 days). |
| Primary | Air Quality: Percent Change in Daily Average Indoor Fine Particulate Matter (PM2.5) Concentration | Baseline (Days 1-30), initial intervention (Days 31-60), and targeted technical assistance (Days 61-90) | Indoor PM2.5 concentrations, measured continuously using PurpleAir monitors and expressed in micrograms per cubic meter (µg/m³), will be summarized as daily averages. To evaluate the impact of the air quality indicator intervention on air quality, relative (%) differences in daily-average PM2.5 will be assessed across the baseline, air-cleaner intervention, and targeted technical-assistance periods and compared between households with and without visual air quality indicators (Arm 1 vs Arm 2). |
| Primary | Difference in Self-Reported Respiratory Symptoms using Breathlessness, Cough, and Sputum Scale (BCSS) or Asthma Control Test (ACT) | Baseline (Days 1-30), initial intervention (Days 31-60), and targeted technical assistance (Days 61-90) | Self-reported respiratory symptoms will be scored using the BCSS instrument for participants with chronic obstructive pulmonary disease (COPD) and with the ACT for those with asthma. To evaluate the respiratory symptom changes with the introduction of the air cleaner, differences in scores will be assessed across the baseline, air-cleaner intervention, and targeted technical-assistance periods and compared between households with and without visual air quality indicators (Arm 1 vs Arm 2). |
| Secondary | Air Quality: Change in Decay Rate of Episodic Indoor Emission Events | Baseline (Days 1-30), initial intervention (Days 31-60), and targeted technical assistance (Days 61-90) | Indoor PM2.5 concentrations, measured continuously using PurpleAir monitors and expressed in micrograms per cubic meter (µg/m³), will be evaluated to identify episodic indoor emission events (e.g., PM2.5 concentration peaks above the indoor baseline). For each indoor episodic event, a decay rate will be calculated. Using the air cleaner loggers, each episodic event will be categorized by air cleaner usage and speed (0 = off vs speeds 1-4) . To evaluate the efficacy of the air cleaners, differences in decay rates will be assessed across the baseline, air-cleaner intervention, and targeted technical-assistance periods and compared between households with and without visual air quality indicators (Arm 1 vs Arm 2). |
Source ClinicalTrials.gov
Outcomes0
Each outcome the trial posted results for, in ClinicalTrials.gov's words.
None in this release.
Results by group0
Each measurement the trial posted, group by group, in the words and numbers it posted.
None in this release.
Participant flow0
How many started, completed or left each group, period by period.
None in this release.
Adverse events0
Each adverse event the trial posted, group by group: the participants affected out of those at risk.
None in this release.
Adverse event totals0
The totals the trial posted for each group.
None in this release.
Papers7
The papers the trial lists on ClinicalTrials.gov.
Grants0
The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.
None in this release.
Trial comparisons0
Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.
None in this release.
Tests0
The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.
None in this release.
Data dates
The day each source was copied for this release.
Sources 3
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
- NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
- NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
For software
Read this trial from software.
The record and each of its lists are JSON, twenty rows a page. No key.
GET https://conductscience.org/api/trials/v1/NCT07914010
GET https://conductscience.org/api/trials/v1/NCT07914010/registered