AsthmaNCT00489762
Does Improving Insulation and Heating Improve Health?
A study testing Installation of an energy efficient heater in people with Asthma, run by University of Otago at 1 site in New Zealand.
Trial summary
The Housing, Heating and Health Study has enrolled 409 households with ineffective heaters, who have a child with asthma between 6 and 12 years. In the winter of 2005, houses were insulated and baseline measures taken of indoor temperatures, nitrogen dioxide, with more intensive indoor air quality monitoring in a… Read more about this study
- Who is it for?
- Ages 6 to 12 years
- Conditions the study is for
- Asthma
- What is being tested?
- Installation of an energy efficient heater
- Type of treatment
- Surgery or procedure
- How many people
- 409 participants
- Where
- 1 siteNew Zealand
- Study dates
- Jun 2005to Oct 2006
- Phase
- Interventional
- Are there results?
- None posted in the registry
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 6 to 12 years
- All sexes
- No healthy volunteers
- Child
Who may be able to join
- Household has asthmatic child between 6 and 12, is living in study area, and will not be moving in the two years after applying to join the study.
Who cannot join
- Heating of good quality and comparable to heater that will be installed by the study
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Housing, Heating and Health Study:a Randomised Community Trial
The Housing, Heating and Health Study has enrolled 409 households with ineffective heaters, who have a child with asthma between 6 and 12 years.
In the winter of 2005, houses were insulated and baseline measures taken of indoor temperatures, nitrogen dioxide, with more intensive indoor air quality monitoring in a sub-sample of 33 homes.
Objective data are being collected on the household's health and energy usage. The households randomly assigned to the intervention group will have new heaters installed over the summer.
Results will be available after the follow-up data collection in 2006.
Read the detailed description
- Introduction New Zealand houses are relatively poorly constructed and maintained for the temperate climate and most homes are heated to less than the WHO recommended minimum winter temperature of 18°C. Excess winter mortality is comparable to the levels in Portugal and Scotland. The Group's previous Housing, Insulation and Health Study has shown that insulating existing homes leads to a small but significant improvement in health and energy consumption, but raised the question as to whether installing more sustainable heating could increase these gains.
- Study design
We have enrolled 409 households, who use either plug-in electric heaters or unflued gas heating, and where there is a child with asthma, aged between 6 and 12 years. In the winter of 2005, uninsulated houses were insulated and baseline measures taken of indoor temperatures in the living room and the child's bedroom, and levels of nitrogen dioxide. Intensive monitoring of indoor air quality is being carried out in a sub-sample of 33 homes. All members of the child's family have filled out detailed questionnaires of their health and the heads-of -household have completed a questionnaire on the characteristics of the household's energy usage. Objective measures are also being collected of the household's fuel bills, the child's attendance at school and the family's health care utilisation.
Households are randomised so that the intervention group will have their choice of new, more efficient and sustainable heaters (heat pumps, wood pellet burners, or flued gas heaters) that heat more of the house and which emit no internal emissions installed over the summer. In the winter of 2006, follow-up measures will be taken and then the control households will receive their choice of new heaters.
- Conditions
- Asthma
- Being tested
- Installation of an energy efficient heater
- Keywords
- Childhood, Asthma, Heating, Insulation, Respiratory symptoms
- Medical subject headings
- Asthma, Signs and Symptoms, Respiratory
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Installation of an energy efficient heaterProcedure or surgery
What is being measured
The primary outcome is the main question the study is designed to answer.
Asthma Symptoms
Measured: One year
FEV1
Measured: One year
Children's days off school and general practitioner visits
Measured: One year
Secondary outcomes (3)
Energy usage
Measured: One year
Hospitalisation
Measured: One year
Temperature in the Home
Measured: Four months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted21 Jun 2007 (estimated)
- Study startJun 2005
- Study completionOct 2006
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (2)Papers the sponsor has linked to this study.
- Other trials for AsthmaStudies 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
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Enrolment
- 409 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Otago
- Sponsor type
- University, hospital or other
- Investigators
- Philippa Howden-Chapman, PhD, Study director, Housing and Health Research Programme
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00489762
- Sponsor's protocol ID
- Heating Study
- Status last verified
- Jun 2007
- First submitted
- 19 Jun 2007
- Last updated
- 21 Jun 2007
- Results posted
- No
- Data monitoring committee
- No
Publications
Gillespie-Bennett J, Pierse N, Wickens K, Crane J, Howden-Chapman P; Housing Heating and Health Study Research Team. The respiratory health effects of nitrogen dioxide in children with asthma. Eur Respir J. 2011 Aug;38(2):303-9. doi: 10.1183/09031936.00115409. Epub 2010 Dec 22.
PubMed 21177840Howden-Chapman P, Pierse N, Nicholls S, Gillespie-Bennett J, Viggers H, Cunningham M, Phipps R, Boulic M, Fjallstrom P, Free S, Chapman R, Lloyd B, Wickens K, Shields D, Baker M, Cunningham C, Woodward A, Bullen C, Crane J. Effects of improved home heating on asthma in community dwelling children: randomised controlled trial. BMJ. 2008 Sep 23;337:a1411. doi: 10.1136/bmj.a1411.
PubMed 18812366
Study at a glance
From the registry record, last updated by the sponsor on 21 Jun 2007. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Housing, Heating and Health Study:a Randomised Community Trial
- ClinicalTrials.gov ID
- NCT00489762
- Acronym / sponsor ID
- Heating Study
- Conditions
- Asthma
- Keywords
- Childhood, Asthma, Heating, Insulation, Respiratory symptoms
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 409 participants (actual)
- Lead sponsor
- University of OtagoUniversity, hospital or other
- Study start
- Jun 2005
- Study completion
- Oct 2006 (actual)
- First posted
- 21 Jun 2007 (estimated)
- 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 Housing, Heating and Health Study has enrolled 409 households with ineffective heaters, who have a child with asthma between 6 and 12 years.
In the winter of 2005, houses were insulated and baseline measures taken of indoor temperatures, nitrogen dioxide, with more intensive indoor air quality monitoring in a sub-sample of 33 homes.
Objective data are being collected on the household's health and energy usage. The households randomly assigned to the intervention group will have new heaters installed over the summer.
Results will be available after the follow-up data collection in 2006.
Detailed description
- Introduction New Zealand houses are relatively poorly constructed and maintained for the temperate climate and most homes are heated to less than the WHO recommended minimum winter temperature of 18°C. Excess winter mortality is comparable to the levels in Portugal and Scotland. The Group's previous Housing, Insulation and Health Study has shown that insulating existing homes leads to a small but significant improvement in health and energy consumption, but raised the question as to whether installing more sustainable heating could increase these gains.
- Study design
We have enrolled 409 households, who use either plug-in electric heaters or unflued gas heating, and where there is a child with asthma, aged between 6 and 12 years. In the winter of 2005, uninsulated houses were insulated and baseline measures taken of indoor temperatures in the living room and the child's bedroom, and levels of nitrogen dioxide. Intensive monitoring of indoor air quality is being carried out in a sub-sample of 33 homes. All members of the child's family have filled out detailed questionnaires of their health and the heads-of -household have completed a questionnaire on the characteristics of the household's energy usage. Objective measures are also being collected of the household's fuel bills, the child's attendance at school and the family's health care utilisation.
Households are randomised so that the intervention group will have their choice of new, more efficient and sustainable heaters (heat pumps, wood pellet burners, or flued gas heaters) that heat more of the house and which emit no internal emissions installed over the summer. In the winter of 2006, follow-up measures will be taken and then the control households will receive their choice of new heaters.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
Who may qualify
- Ages
- 6 to 12 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child
Key inclusion criteria (1 listed)
- Household has asthmatic child between 6 and 12, is living in study area, and will not be moving in the two years after applying to join the study.
Key exclusion criteria (1 listed)
- Heating of good quality and comparable to heater that will be installed by the study
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 |
|---|---|---|
| Installation of an energy efficient heater | Procedure or surgery | – |
Primary outcome
Asthma Symptoms
Time frame: One year
FEV1
Time frame: One year
Children's days off school and general practitioner visits
Time frame: One year
3 secondary outcomes
Energy usage
Time frame: One year
Hospitalisation
Time frame: One year
Temperature in the Home
Time frame: Four months
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 21 Jun 2007.
- Derived from this study: PubMed 21177840Gillespie-Bennett J, Pierse N, Wickens K, Crane J, Howden-Chapman P; Housing Heating and Health Study Research Team. The respiratory health effects of nitrogen dioxide in children with asthma. Eur Respir J. 2011 Aug;38(2):303-9. doi: 10.1183/09031936.00115409. Epub 2010 Dec 22.
- Derived from this study: PubMed 18812366Howden-Chapman P, Pierse N, Nicholls S, Gillespie-Bennett J, Viggers H, Cunningham M, Phipps R, Boulic M, Fjallstrom P, Free S, Chapman R, Lloyd B, Wickens K, Shields D, Baker M, Cunningham C, Woodward A, Bullen C, Crane J. Effects of improved home heating on asthma in community dwelling children: randomised controlled trial. BMJ. 2008 Sep 23;337:a1411. doi: 10.1136/bmj.a1411.
- Click here for more information about the "Housing, Heating and Health Study" on the website of the Housing and Health Research Programme, University of Otago, WellingtonLink provided by the sponsor.
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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. This study is not recruiting at the moment.
Philippa Howden-Chapman, PhD study director
Housing and Health Research Programme
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Installation of an energy efficient heater in people with Asthma, run by University of Otago at 1 site in New Zealand.
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 1 inclusion and 1 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: finished, as of the sponsor's last update on 21 Jun 2007. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in New Zealand. Whether a site is taking part right now should be confirmed with that site. See every site.
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?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Asthma Symptoms (time frame: One year). The study lists 3 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 NCT00489762, which also lists 2 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 21 Jun 2007.