Asthma ControlNCT07603206
Replacing Gas Stoves With Portable Electric Appliances to Improve Indoor Air Quality and Asthma Control
A study testing Portable cooking appliances in people with Asthma Control, run by MetroHealth Medical Center.
Trial summary
The goals of this study are to determine if replacing gas stoves with portable electric hot plates and electric toaster ovens will improve indoor air quality and asthma control. Researchers will enroll participants with poorly controlled asthma and provide them with hot plates and toaster ovens to use instead of gas… Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Asthma Control
- What is being tested?
- Portable cooking appliances
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 20 participants
- Where
- No sites listed yet
- Study dates
- Jun 2026to May 2029
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Currently use gas stove for cooking or baking at least three times a week
- Poorly controlled asthma as defined by an Asthma Control Questionnaire score of 1.5 or larger
Who cannot join
- Impaired decision making capacity
- Pregnancy
Trial locations and contacts
No sites are listed yet. Contact the study team or a site near you to ask about taking part.
About this study
The goals of this study are to determine if replacing gas stoves with portable electric hot plates and electric toaster ovens will improve indoor air quality and asthma control. Researchers will enroll participants with poorly controlled asthma and provide them with hot plates and toaster ovens to use instead of gas stoves. Researchers will measure indoor air quality about 1-2 weeks before and about 2-3 months after providing portable appliances. Participants will answer questions about their asthma symptoms and take lung function tests about 1-2 weeks before and about 2-3 months after using portable appliances.
Read the detailed description
Cooking on natural gas stoves is a major source of indoor air pollution and may contribute to asthma exacerbations. The investigators recently completed a single-arm trial in which gas stoves were replaced with electric induction stoves in the homes of 85 individuals with poorly controlled asthma. This led to 70% reductions in indoor NO2 levels and clinically important improvements in multiple measures of asthma control. Asthma Control Questionnaire scores improved by 1.1 points in this trial, which is twice as large as the average improvement seen with medical treatment such as inhaled corticosteroids and/or long-acting beta-agonists.
While these results are promising, the trial lacked a control group which limits the causal inferences that can be drawn. In addition, lung function was not directly measured. Moreover, the costs for stove installation and required electrical upgrades averaged nearly $10,000 per home. Most of this cost was related to the older housing stock of trial participants that often required upgrading the entire electrical panel in a house to install a new 240-volt kitchen outlet for the new electric stove. These costs can be a financial challenge for low-income households, limiting the scalability of a potentially effective solution for improving indoor air quality and asthma control.
To address these limitations, the investigators now propose a pilot randomized controlled trial using a delayed crossover design to evaluate the effectiveness of a low-cost intervention to improve indoor air quality, asthma control, and lung function. The investigators will leave gas stoves in place but will instruct participants to preferentially use two relatively inexpensive portable electric appliances that the investigators will provide. Cooking will be done with an electric induction hot plate and baking with an electric toaster oven. Induction hot plates use magnetic coils beneath a ceramic glass surface to send electromagnetic pulses directly to cookware. The investigators will provide induction stove compatible cookware because it is necessary to use cookware that has some steel or iron in order for the energy transfer to work.
The two portable electric appliances and induction cookware are estimated to cost approximately $600 in total and may provide a more affordable option for low-income households. If a household already has a microwave oven, they will be encouraged to use that as well. As the future scalability of the intervention will depend on its usage, the investigators will also evaluate usage and identify facilitators and barriers to consistent use of the portable devices.
- Conditions
- Asthma Control
- Being tested
- Portable cooking appliances
- Keywords
- asthma, indoor air quality
- Medical subject headings
- Asthma
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Portable cooking appliancesOther
The investigators will leave gas stoves in place but will instruct participants to preferentially use two relatively inexpensive portable electric appliances that the investigators will provide. Cooking will be done with an electric induction hot plate and baking with an electric toaster oven.
| Study group | Role | What they receive |
|---|---|---|
| Immediate Intervention | Experimental | Participants will receive electric hotplate and electric toaster oven immediately after enrollment. Receives: Other: Portable cooking appliances |
| Delayed Intervention | Experimental | Participants will receive electric hotplate and electric toaster oven six months after enrollment. Receives: Other: Portable cooking appliances |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in asthma control
Change in Asthma Control Questionnaire score from baseline to final assessment. Asthma Control Questionnaire scores can range from 0 to 6 with higher scores indicating poor asthma control.
Measured: Baseline assessment 1-2 weeks before portable appliances given to participant. Final assessment 2-3 months after portable appliances given to participant.
Change in indoor nitrogen dioxide levels
Change in nitrogen dioxide level from baseline to final assessment
Measured: Baseline assessment 1-2 weeks before portable appliances given to participant. Final assessment 2-3 months after portable appliances given to participant.
Secondary outcomes (1)
Change in forced expiratory volume in 1 second (FEV1)
Changes in FEV1 from baseline to final assessment.
Measured: Baseline assessment 1-2 weeks before portable appliances given to participant. Final assessment 2-3 months after portable appliances given to participant.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted22 May 2026
- Study startJun 2026 (estimated)
- Primary completionMay 2029 (estimated)
- Study completionMay 2029 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for Asthma ControlStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- None (open label)
- Enrolment
- 20 participants (estimated)
Sponsor and investigators
- Lead sponsor
- MetroHealth Medical Center
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Ash Sehgal, MetroHealth Medical Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07603206
- Sponsor's protocol ID
- STUDY00001017
- Status last verified
- May 2026
- First submitted
- 28 Apr 2026
- Last updated
- 22 May 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Bime C, Nguyen J, Wise RA. Measures of asthma control. Curr Opin Pulm Med. 2012 Jan;18(1):48-56. doi: 10.1097/MCP.0b013e32834db0f2.
PubMed 22081089Audignon-Durand S, Ramalho O, Mandin C, Roudil A, Le Bihan O, Delva F, Lacourt A. Indoor exposure to ultrafine particles related to domestic activities: A systematic review and meta-analysis. Sci Total Environ. 2023 Dec 15;904:166947. doi: 10.1016/j.scitotenv.2023.166947. Epub 2023 Sep 9.
PubMed 37690752Lebel ED, Finnegan CJ, Ouyang Z, Jackson RB. Methane and NOx Emissions from Natural Gas Stoves, Cooktops, and Ovens in Residential Homes. Environ Sci Technol. 2022 Feb 15;56(4):2529-2539. doi: 10.1021/acs.est.1c04707. Epub 2022 Jan 27.
PubMed 35081712
Study at a glance
From the registry record, last updated by the sponsor on 22 May 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Replacing Gas Stoves With Portable Electric Appliances to Improve Indoor Air Quality and Asthma Control
- ClinicalTrials.gov ID
- NCT07603206
- Acronym / sponsor ID
- STUDY00001017
- Conditions
- Asthma Control
- Keywords
- asthma, indoor air quality
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 20 participants (estimated)
- Lead sponsor
- MetroHealth Medical CenterUniversity, hospital or other
- Study start
- Jun 2026 (estimated)
- Primary completion
- May 2029 (estimated)
- Study completion
- May 2029 (estimated)
- First posted
- 22 May 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The goals of this study are to determine if replacing gas stoves with portable electric hot plates and electric toaster ovens will improve indoor air quality and asthma control. Researchers will enroll participants with poorly controlled asthma and provide them with hot plates and toaster ovens to use instead of gas stoves. Researchers will measure indoor air quality about 1-2 weeks before and about 2-3 months after providing portable appliances. Participants will answer questions about their asthma symptoms and take lung function tests about 1-2 weeks before and about 2-3 months after using portable appliances.
Detailed description
Cooking on natural gas stoves is a major source of indoor air pollution and may contribute to asthma exacerbations. The investigators recently completed a single-arm trial in which gas stoves were replaced with electric induction stoves in the homes of 85 individuals with poorly controlled asthma. This led to 70% reductions in indoor NO2 levels and clinically important improvements in multiple measures of asthma control. Asthma Control Questionnaire scores improved by 1.1 points in this trial, which is twice as large as the average improvement seen with medical treatment such as inhaled corticosteroids and/or long-acting beta-agonists.
While these results are promising, the trial lacked a control group which limits the causal inferences that can be drawn. In addition, lung function was not directly measured. Moreover, the costs for stove installation and required electrical upgrades averaged nearly $10,000 per home. Most of this cost was related to the older housing stock of trial participants that often required upgrading the entire electrical panel in a house to install a new 240-volt kitchen outlet for the new electric stove. These costs can be a financial challenge for low-income households, limiting the scalability of a potentially effective solution for improving indoor air quality and asthma control.
To address these limitations, the investigators now propose a pilot randomized controlled trial using a delayed crossover design to evaluate the effectiveness of a low-cost intervention to improve indoor air quality, asthma control, and lung function. The investigators will leave gas stoves in place but will instruct participants to preferentially use two relatively inexpensive portable electric appliances that the investigators will provide. Cooking will be done with an electric induction hot plate and baking with an electric toaster oven. Induction hot plates use magnetic coils beneath a ceramic glass surface to send electromagnetic pulses directly to cookware. The investigators will provide induction stove compatible cookware because it is necessary to use cookware that has some steel or iron in order for the energy transfer to work.
The two portable electric appliances and induction cookware are estimated to cost approximately $600 in total and may provide a more affordable option for low-income households. If a household already has a microwave oven, they will be encouraged to use that as well. As the future scalability of the intervention will depend on its usage, the investigators will also evaluate usage and identify facilitators and barriers to consistent use of the portable devices.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Immediate Intervention | Experimental | Other: Portable cooking appliancesParticipants will receive electric hotplate and electric toaster oven immediately after enrollment. |
| Delayed Intervention | Experimental | Other: Portable cooking appliancesParticipants will receive electric hotplate and electric toaster oven six months after enrollment. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Currently use gas stove for cooking or baking at least three times a week
- Poorly controlled asthma as defined by an Asthma Control Questionnaire score of 1.5 or larger
Key exclusion criteria (2 listed)
- Impaired decision making capacity
- Pregnancy
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Portable cooking appliancesThe investigators will leave gas stoves in place but will instruct participants to preferentially use two relatively inexpensive portable electric appliances that the investigators will provide. Cooking will be done with an electric induction hot plate and baking with an electric toaster oven. | Other | Delayed Intervention, Immediate Intervention |
Primary outcome
Change in asthma control
Time frame: Baseline assessment 1-2 weeks before portable appliances given to participant. Final assessment 2-3 months after portable appliances given to participant.
Change in Asthma Control Questionnaire score from baseline to final assessment. Asthma Control Questionnaire scores can range from 0 to 6 with higher scores indicating poor asthma control.
Change in indoor nitrogen dioxide levels
Time frame: Baseline assessment 1-2 weeks before portable appliances given to participant. Final assessment 2-3 months after portable appliances given to participant.
Change in nitrogen dioxide level from baseline to final assessment
1 secondary outcome
Change in forced expiratory volume in 1 second (FEV1)
Time frame: Baseline assessment 1-2 weeks before portable appliances given to participant. Final assessment 2-3 months after portable appliances given to participant.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 May 2026.
- Background: PubMed 22081089Bime C, Nguyen J, Wise RA. Measures of asthma control. Curr Opin Pulm Med. 2012 Jan;18(1):48-56. doi: 10.1097/MCP.0b013e32834db0f2.
- Background: PubMed 37690752Audignon-Durand S, Ramalho O, Mandin C, Roudil A, Le Bihan O, Delva F, Lacourt A. Indoor exposure to ultrafine particles related to domestic activities: A systematic review and meta-analysis. Sci Total Environ. 2023 Dec 15;904:166947. doi: 10.1016/j.scitotenv.2023.166947. Epub 2023 Sep 9.
- Background: PubMed 35081712Lebel ED, Finnegan CJ, Ouyang Z, Jackson RB. Methane and NOx Emissions from Natural Gas Stoves, Cooktops, and Ovens in Residential Homes. Environ Sci Technol. 2022 Feb 15;56(4):2529-2539. doi: 10.1021/acs.est.1c04707. Epub 2022 Jan 27.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Questions about this trial
What is this clinical trial studying?
A study testing Portable cooking appliances in people with Asthma Control, run by MetroHealth Medical Center.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 22 May 2026. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Ash Sehgal, MD (216-778-7728, axs81@cwru.edu), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in asthma control (time frame: Baseline assessment 1-2 weeks before portable appliances given to participant. Final assessment 2-3 months after portable appliances given to participant.). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07603206, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 May 2026.