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Nature-based activities to support mental ill health

Nature on prescription to support mental ill health (GREENGAGE): a pilot randomised controlled trial and process evaluation

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN12900725
Enrollment
84
Registered
2025-07-04
Start date
2025-06-16
Completion date
Unknown
Last updated
2026-03-16

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

Conditions

Mental health Mental and Behavioural Disorders

Interventions

The participation process for individuals will be: 1. Reading the project PIS. 2. Opportunity to discuss the project with the research team. 3. Initial suitability for location and timing of nature-ba
Mental health and wellbeing measures
Health service use questionnaire). 7. Random allocation to either the intervention group (nature-based activities) or the control group (usual care, wait list). 8. Those allocated to the intervention
Loneliness measure
Health service use questionnaire). 10. Participation in a focus group discussion about their experience of the pilot trial (optional). 11. Those allocated to the control group will be offered the oppo

Sponsors

University of Exeter
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 100 Years

Inclusion criteria

Inclusion criteria: 1. People aged 18 years and over 2. People with mild to moderate depression and/or anxiety assessed by scores of 10-19 on the Patient Health Questionnaire (PHQ-9) and/or 5-14 on the Generalised Anxiety Disorder assessment (GAD-7) 3. Ability to give informed consent to written information sheets and consent forms 4. Participants may be on any current treatment for mild to moderate depression and/or anxiety, or none

Exclusion criteria

Exclusion criteria: 1. People with severe depression and/or anxiety (as assessed by scores of 20 or more on the PHQ-9 and/or 15 or more on GAD-7) 2. People unable to understand written and verbal instructions in English 3. Those with serious physical impairment that would prevent participation in even adapted nature-based activities (such as walking, gardening, pond dipping) 4. Actively suicidal or psychotic (as assessed by the mood screener – see later details) Participants will need to have a good understanding of English to participate given that the intervention instructions, including safety instructions related to specific activities or tool use, will be given in English by the nature-based providers on the day. As these are small VCSE groups, it is not possible for staff to accommodate other languages.

Design outcomes

Primary

MeasureTime frame
1. Anxiety is measured using the Generalised Anxiety Score scale (GAD-7) at T0 (baseline), T1 (end of intervention), and T2 (6-week follow-up). 2. Depressive symptoms are measured using the Patient Health Questionnaire scale (PHQ-9) at T0 (baseline), T1 (end of intervention), and T2 (6-week follow-up).

Secondary

MeasureTime frame
1. Mental wellbeing is measured using the short Warwick-Edinburgh Mental Wellbeing Scale (sWEMWBS) at T0 (baseline), T1 (end of intervention), T2 (6-week follow-up) 2. Wellbeing is measured using the ONS4 scale at T0 (baseline), T1 (end of intervention), and T2 (6-week follow-up) 3. Loneliness is measured using both: 3.1. The UCLA Three-Item Loneliness Scale 3.2. A single-item direct measure, asking "How often do you feel lonely?" both at T0 (baseline), T1 (end of intervention), and T2 (6-week follow-up) 4. Health services use/economics is a bespoke measure at T0 (baseline), T1 (end of intervention), and T2 (6-week follow-up) Process measures: 1. Decliner data measured using bespoke questionnaire at identified point of decline to participate/drop out at any time post randomisation 2. Intervention Group participant experience assessed using Focus Groups at Post-intervention (T1) 3. Waitlist control group participant experience assessed using Focus Groups before they participated in the waitlist intervention 4. Nature-Based Provider experience assessed using Focus Groups after the wait list intervention has taken place.

Countries

England, United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Sep 18, 2026