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Evaluating nasal sprays and physical activity/stress management in reducing respiratory infections in primary care

Reducing respiratory infections in primary care: the Immune Defence Study

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN17936080
Enrollment
15000
Registered
2020-10-30
Start date
2020-11-01
Completion date
Unknown
Last updated
2025-09-22

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

Conditions

Respiratory tract infections Respiratory

Interventions

Participants will be invited to take part in the study through invitation letters from their GP surgery. Those who are interested in taking part will be asked to register online and to answer some que

Sponsors

University of Southampton
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Patients aged =18 years with a risk factor: 1.1. Known weakened immune system due to a serious illness or medication (e.g. chemotherapy) 1.2. Known heart disease 1.3. Known asthma or lung disease 1.4. Known diabetes 1.5. Known mild hepatic impairment 1.6. Known stroke or neurological problem 1.7. Obesity (BMI >30) 1.8. Patients with =3 episodes of an RTI in the last year 2. Patients aged =65 3. Have access to the internet

Exclusion criteria

Exclusion criteria: 1. Terminal illness/palliative care 2. Living with dementia 3. Living in residential care 4. Pregnancy or breastfeeding 5. Regular use of nasal sprays for respiratory infection control in the last 6 months 6. Allergy to nasal sprays 7. Living in the same household as another participant 8. Previously involved in RECUR programme development work

Design outcomes

Primary

MeasureTime frame
Duration of illness due to respiratory tract infections (RTIs) measured using patient report of total days with symptoms over 6 months (data collected monthly, at 3, 6 and 12 months)

Secondary

MeasureTime frame
1. The incidence of respiratory tract infections measured using patient report of the total number of infections over 6 months (data collected monthly, at 3, 6 and 12 months) 2. Number of health service contacts measured using patient report over 6 months (data collected monthly, at 3, 6 and 12 months) 3. Number of admissions to hospital in total and for respiratory tract infections using patient report and GP report (data collected monthly, at 3, 6 and 12 months) and medical notes review (12 months) 4. Use of health service resource (to estimate the cost-effectiveness of each intervention) measured by patient report (data collected monthly, at 3, 6 and 12 months) and medical notes review (12 months) 5. Use of antibiotics for respiratory tract infections measured by patient report (data collected monthly, at 3, 6 and 12 months) and medical notes review (12 months) 6. The incidence of COVID-like infections (during winters when COVID is circulating) measured using patient report of the total number of infections over 6 months (data collected monthly and at 6 months) 7. The incidence of confirmed COVID infections measured through patient report as part of normal management (data collected monthly, at 3, 6 and 12 months) and medical notes review (12 months)

Countries

England, United Kingdom

Contacts

Public ContactKate Martinson
k.martinson@soton.ac.uk+44 (0)23 8024 1768

Outcome results

None listed

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