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Enrolling by invitationNCT06422988Updated May 7, 2025

Do Probiotics Reduce The Risk Of Severe Necrotising Enterocolitis (NEC) In Infants Born Before 32 Weeks Gestation?

An observational study in Enterocolitis, Necrotizing, sponsored by Imperial College London. Enrolling by invitation at 1 site in United Kingdom. Open to participants aged Up to 32 Weeks. Per ClinicalTrials.gov, last updated 2025-05-07.

Sponsored by Imperial College London · Observational

From the registry’s dates

  • Primary completion was expected by Jul 2025, 1 year 3 months ago, but the record still lists the study as enrolling by invitation.
Study type
Observational
Model
Cohort
Time perspective
Retrospective
Enrollment
48,000
Ages
Up to 32 Weeks
Sex
All
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Study summary

Necrotising enterocolitis (NEC) is one of the leading causes of mortality and morbidity in very preterm infants. This study aims to determine whether NEC rates are different between infants who receive probiotics versus infants who do not receive probiotics. The study has a retrospective cohort design and will utilise routinely collected data from the UK National Neonatal Research Database (NNRD). The cohort will comprise all infants born before 32 weeks gestation and cared for in neonatal units in England and Wales between 2016 and 2022. A propensity score matched approach will be used to conduct two comparisons: i) the risk of necrotising enterocolitis (NEC) between who do and those who do not receive probiotics in the first 14 days of life ii) the risk of NEC between babies who receive the two most common probiotic products used in UK units, (Labinic and Proprems).

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Conditions studied

  • Enterocolitis, Necrotizing

Keywords

  • Probiotics
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In context

Enterocolitis, Necrotizing

228 studies on the registry are indexed under Enterocolitis, Necrotizing; 44 are open to participants now.

This study's planned enrollment of 48,000 is above the median of 144 across 95 observational studies indexed under Enterocolitis, Necrotizing.

Browse Enterocolitis, Necrotizing studies →

Lead sponsor

Imperial College London is the lead sponsor of 843 studies on the registry; 180 are open to participants now.

Of its 9 completed or terminated interventional studies of FDA-regulated products, 6 (67%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
Up to 32 Weeks
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Infants born very preterm i.e. before 32 weeks gestation

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Eligible infants must have been born at less than 32 weeks gestation and be cared for in a English or Welsh unit which contributes data to the National Neonatal Research Database (this includes all NHS neonatal units in England and Wales).
  • Infants born in the period January 1st, 2016, to December 31st, 2022 (7 years) will be included.

Exclusion criteria

Exclusion Criteria:

  • They have missing data for any of: gestational age at birth, birth weight, year of birth and date of death (for those that died).
  • Their NNRD record does not include details of their first admission or begins after Day 3 of life.
  • The absolute value of their recorded birthweight for gestational age z score exceeds 4 or is missing.
  • They die in the first two postnatal days of life.
  • They have a major congenital abnormality
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Study design

Observational model
Cohort
Time perspective
Retrospective
Enrollment
48,000 participants (estimated)
Patient registry
No

Groups and cohorts

  • Exposed to probiotics

    Receipt of any probiotic in the first 14 days of life. Probiotics to include: Labinic, Proprems probiotic, Acidophillus, Bifidobacterium, Bio-kult, Infloran, LB2. To address potential recording error, infants whose NNRD records show minimal (one day) of probiotic exposure will only be classed as exposed if they are cared for in a probiotic unit. Probiotic units are defined as: * units who have confirmed that a guideline was in place to provide probiotics to infants born before 32 weeks gestation and that the guideline was in place at any point in the year that the infant was born OR * units where more than 50% of the infants eligible to be part of the cohort received probiotics in the six months after the infant was born.

    Dietary Supplement: Probiotics

  • No probiotic exposure

    Did not receive any probiotic in the first 14 days of life.

    Dietary Supplement: Probiotics

Interventions

  • Dietary supplementProbiotics

    Any exposure to probiotics in first 14 days of life

    Also known as: Labinic, Proprems, Acidophillus, Bifidobacterium, Bio-kult, Infloran, LB2

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What researchers measure

Primary outcomes

  1. Severe necrotising enterocolitis (NEC)

    NEC confirmed at surgery or postmortem or listed as a cause of death

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

Secondary outcomes

  1. Necrotising enterocolitis (NNAP definition)

    NEC diagnosed at postmortem or NEC diagnosed during surgery or NEC diagnosed using clinical and radiographic features (where the infant has at least one clinical feature (bilious gastric aspirate or emesis, abdominal distension, occult, gross blood in stool) and at least one radiographic feature (pneumatosis, hepato-biliary gas, pneumoperitoneum)).

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

  2. Pragmatically defined NEC

    Infants who had a recorded diagnosis of necrotising enterocolitis and received at least 5 consecutive days of antibiotics whilst also nil by mouth

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

  3. Late onset sepsis

    HQIP NNAP case definition

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

  4. Pragmatically defined late onset sepsis

    Growth of any organisms that appear in the NNAP lists of "Clearly pathogenic organisms" and "Other organisms"

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

  5. Survival to discharge home

    Time frame: On date of discharge from final neonatal unit, assessed up to 24 months

  6. Survival without severe NEC or late onset sepsis (LOS)

    LOS is defined according to the Healthcare Quality Improvement Partnership (HQIP) National Neonatal Audit Programme (NNAP) case definition i.e. blood stream or cerebrospinal fluid confirmed pure growth in culture after first three days of life

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

  7. Survival without any NEC

    NEC is defined as per the NNAP definition

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

  8. Brain injury

    Either left or right grade 3 or higher intra-ventricular haemorrhage or cystic periventricular leukomalacia

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

  9. Treated retinopathy of prematurity

    Defined as cryotherapy, laser therapy or injection of anti-vascular endothelial growth factor therapy for ROP in either or both eyes

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

  10. Stage of retinopathy of prematurity

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

  11. Bronchopulmonary dysplasia

    Defined as any respiratory or ventilatory support or supplemental oxygen at 36 weeks postmenstrual age

    Time frame: 36 weeks postmenstrual age

  12. Severe bronchopulmonary dysplasia

    Defined as ventilation via endotracheal tube or trachestomy, and excluding non-invasive support or CPAP, at 36 weeks postmenstrual age

    Time frame: 36 weeks postmenstrual age

  13. Length of stay

    Number of days between first neonatal unit admission and final neonatal unit discharge for surviving infants

    Time frame: From date of birth until the date of discharge from final neonatal unit, assessed up to 24 months

  14. Time to full feeds

    Defined as the number of days until an infant is recorded as not requiring any parenteral nutrition or fluid (i.e. no parenteral nutrition or intravenous dextrose)

    Time frame: Before discharge from final neonatal unit

  15. Growth

    Weight for post-menstrual age standard deviation score

    Time frame: 36 weeks corrected gestational age

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Study locations

1 site
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References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: Undecided — Study protocol available now. Analysis code will be available after publication of results.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 7, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06422988
Collaborators
University of Nottingham, Newcastle University, Queen Mary University of London
Responsible party
Cheryl Battersby (Clinical Senior Lecturer, Imperial College London) — Principal investigator
First posted
May 21, 2024
Start date
May 30, 2024
Primary completion
Jul 30, 2025 (estimated)
Completion
Dec 30, 2026 (estimated)
Last update
May 7, 2025

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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