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Preterm Lung Health Research
A clinical trial for babies born very prematurely
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Congratulations to

John Radcliffe Hospitalfor recruiting the latest BALLOON baby on .

Recruitment dashboard

Families and neonatal teams are moving BALLOON forward.

Recruitment figures show progress towards the trial target and contributions from participating neonatal units across the UK.

At a glance

Current recruitment

Total recruited113Target: 542
Progress20.8%429 participants remaining
Latest recruitment20 August 2026John Radcliffe Hospital
Centres reporting recruitment20Across the UK

Contributions across the network

Recruitment by centre

Figures are ordered by number recruited. Every participating family contributes equally to the trial, wherever recruitment takes place.

View recruitment by centre as a table
CentreNumber recruited
Queen Alexandra Hospital21
Royal Victoria Infirmary12
Leicester Royal Infirmary10
University Hospital of Wales10
John Radcliffe Hospital9
Southmead Hospital7
Mid Yorkshire Teaching NHS Trust6
Hull Royal Infirmary5
Royal Preston Hospital5
Royal Sussex County Hospital5
University Hospitals Birmingham NHS Foundation Trust5
Maidstone and Tunbridge Wells NHS Trust4
Medway Maritime Hospital4
Worthing Hospital3
St. Peters Hospital Chertsey2
Arrowe Park Hospital1
Norfolk and Norwich University Hospitals NHS Foundation Trust1
Royal United Hospital Bath1
St George's Hospital1
St Richard’s Hospital1
Total recruited113

Progress over time

Monthly and cumulative recruitment

Bars show the number recruited each month; the line shows the cumulative total. Exact values are also available in the table below.

View monthly and cumulative figures as a table
MonthRecruited that monthCumulative recruitment
Apr 202511
May 202534
Jun 2025812
Jul 2025820
Aug 2025525
Sep 2025732
Oct 2025941
Nov 2025344
Dec 2025953
Jan 2026861
Feb 2026768
Mar 2026674
Apr 2026276
May 20261288
Jun 2026896
Jul 20266102
Aug 202611113

How recruitment works

Families are approached by their local neonatal research team.

Babies are recruited while receiving care in a participating hospital. Families do not need to search for a centre, arrange a referral or contact another hospital.

For trial questions: participating families should contact the research nurse at their baby’s local hospital.

For clinical advice: contact your baby’s local clinical service, neonatal team, GP or NHS 111. Call 999 in an emergency.