A study to explore knowledge, views and behaviours surrounding inhaler selection and whether knowledge of the carbon footprint of inhalers is important to patients

A randomised controlled trial to explore knowledge, views and behaviours surrounding inhaler selection and whether the carbon footprint of inhalers is important to patients

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN16609010

Enrollment

5492

Registered

2023-11-09

Start date

2023-10-25

Completion date

Unknown

Last updated

2023-11-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Asthma Respiratory

Interventions

Participants will be randomised into either: - The Control arm- Participants will not receive any information regarding the carbon footprint of individual inhalers - Th

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Aged >= 18 years 2. Have a diagnosed respiratory condition and take an inhaler regularly 3. Able to provide e-consent 4. Able to understand and complete the clinical case scenarios

Exclusion criteria

Exclusion criteria: Inability to understand or comply with study procedures and/or inability to give fully informed consent.

Design outcomes

Primary

Measure	Time frame
Measured by questionnaire at point of questionnaire completion: 1. The number and proportion of participants preferring high or low carbon inhalers 2. The number and proportion of participants who think carbon footprint should be included in inhaler choice discussions 3. The number and proportion of participants who would be willing to change their inhaler to a lower carbon option	—

Secondary

Measure	Time frame
Measured by questionnaire at point of questionnaire completion: 1. The rank order of preference of the following factors in carbon-containing and non-carbon containing groups: Cost of the inhaler, Carbon footprint of the inhaler, How many times a day the inhaler needs to be used, The view of the healthcare professional prescribing the inhaler 2. With sensitivity analyses of the order of preference for the following factors in both groups: Age, Respiratory condition, Level of education attainment, Number of inhalers used by the participant, Length of time participant has been using inhalers 3. The number and proportion of participants who are aware of the environmental impact of inhalers 4. The number and proportion of participants matching the inhaler carbon footprint to the equivalent car journey 5. The rank order of preference of the following options in the provision of inhaler carbon footprint: By the healthcare professional prescribing the inhaler, as gCO2Eq on the inhaler packaging, access to a website displaying the carbon footprint of all inhalers, by the pharmacist when collecting prescriptions, would not want to receive the information 6. The rank order of preference of the following options of how inhaler carbon footprint should be made available : By using a traffic light system to demonstrate high/medium/low carbon footprints, As an exact value (in grams of carbon dioxide equivalent), Using everyday measures as a comparator, Would not want to receive the information 7. The proportion of participants that try to recycle their inhalers. 8. The proportion of participants that would use inhaler recycling facilities if available	—

Measure

Time frame

Measured by questionnaire at point of questionnaire completion: 1. The rank order of preference of the following factors in carbon-containing and non-carbon containing groups: Cost of the inhaler, Carbon footprint of the inhaler, How many times a day the inhaler needs to be used, The view of the healthcare professional prescribing the inhaler 2. With sensitivity analyses of the order of preference for the following factors in both groups: Age, Respiratory condition, Level of education attainment, Number of inhalers used by the participant, Length of time participant has been using inhalers 3. The number and proportion of participants who are aware of the environmental impact of inhalers 4. The number and proportion of participants matching the inhaler carbon footprint to the equivalent car journey 5. The rank order of preference of the following options in the provision of inhaler carbon footprint: By the healthcare professional prescribing the inhaler, as gCO2Eq on the inhaler packaging, access to a website displaying the carbon footprint of all inhalers, by the pharmacist when collecting prescriptions, would not want to receive the information 6. The rank order of preference of the following options of how inhaler carbon footprint should be made available : By using a traffic light system to demonstrate high/medium/low carbon footprints, As an exact value (in grams of carbon dioxide equivalent), Using everyday measures as a comparator, Would not want to receive the information 7. The proportion of participants that try to recycle their inhalers. 8. The proportion of participants that would use inhaler recycling facilities if available

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Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026