Influence of Intrauterine Growth Restriction on Amplitude-integrated EEG in Preterm Infants

September 13, 2013 updated by: Katrin Klebermass-Schrehof, Medical University of Vienna

Intrauterine Growth Restriction Has an Impact on Amplitude-integrated EEG in Preterm Infants

Objective: The impact of intrauterine growth restriction (IUGR) on perinatal morbidity and long-term neurodevelopmental outcome has been published in numerous studies. Throughout this analysis, the influence of IUGR on the postnatal amplitude-integrated EEG (aEEG) in preterm infants below 30 weeks of gestation was assessed. The second concern was the correlation between the pattern of the aEEG in the first two weeks with neurodevelopmental outcome, comparing infants with and without IUGR.

Methods: Routinely assessed aEEG data of preterm infants with IUGR born below 30 weeks of gestation in the years 2005 until 2007 were analysed retrospectively according to the aEEG score (combining occurrence of sleep-wake-cycles, background activity and suspected seizure activity). Neurodevelopmental outcome was evaluated at 24 months using the Bayley Scales of Infant Development and standardized neurologic examination.

Study Overview

Study Type

Observational

Enrollment (Actual)

156

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Vienna, Austria, 1090
        • Medical University Vienna

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

5 months to 6 months (Child)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Retrospectively, children with intrauterine growth restriction (defined as a birth weight below the 10th percentile) treated at the Neonatal Intensive Care Unit (NICU) of the Medical University Vienna between 2005 and 2007 were included in the study. Besides IUGR, inclusion criteria were gestational age between 23+1 and 29+6 weeks and routinely assessed aEEG measurements. Infants with congenital anomalies and severe asphyxia were excluded. The control group consists of infants of the same age with normal birth weight (>10th percentile) in the same study period.

Description

Inclusion Criteria:

  • preterm infants below 30 weeks of gestation

Exclusion Criteria:

  • congenital anomalies
  • severe asphyxia

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Intrauterine growth restriction
birth weight <10th percentile first intervention: aEEG second intervention: assessment of neurodevelopmental follow-up
The amplitude integrated EEG was performed using a single-channel, biparietal aEEG (CFM 6000; Natus Medical Incorporated, San Carlos, CA)
Other Names:
  • assessment of neurodevelopmental follow-up
Appropriate for gestation age
control group with birth weight >10th percentile first intervention: aEEG second intervention: assessment of neurodevelopmental follow-up
The amplitude integrated EEG was performed using a single-channel, biparietal aEEG (CFM 6000; Natus Medical Incorporated, San Carlos, CA)
Other Names:
  • assessment of neurodevelopmental follow-up

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
aEEG score (including background pattern, occurrence of sleep-wake-cycling and presence of seizure activity)
Time Frame: first 14 days of life
composite score background activity (BA), occurrence of sleep-wake-cycling (SWC) and presence of seizure activity (SA) meaning score 1= normal (normal BA, SWC yes, SA no) and score 2 and 3 = abnormal (2=abnormality in 1 category (BA, SWC or SA) and score 3= abnormality in 2 or 3 categories
first 14 days of life

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Neurodevelopmental outcome
Time Frame: 24 months
composite score: Bayley Scales of Infant Development (>85= normal, <70 severely impaired, 71-84= mildly impaired) and standardized neurologic examination (normal or abnormal)
24 months

Other Outcome Measures

Outcome Measure
Measure Description
Time Frame
Morbidity, mortality and neurodevelopmental outcome of patients with IUGR compared to controls
Time Frame: 24 months
morbidities until discharge (Intraventricular hemorrhage, retinopathy, chronic lung disease, necrotizing enterocolitis, periventricular leucomalacia); mortality and neurodevelopmental outcome (via Bayley Scales of Infant Development >85= normal, <70 = severly impaired)
24 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Katrin Klebermass-Schrehof, MD, Medical University of Vienna

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

June 1, 2010

Primary Completion (Anticipated)

September 1, 2013

Study Completion (Anticipated)

September 1, 2013

Study Registration Dates

First Submitted

August 24, 2013

First Submitted That Met QC Criteria

September 13, 2013

First Posted (Estimate)

September 16, 2013

Study Record Updates

Last Update Posted (Estimate)

September 16, 2013

Last Update Submitted That Met QC Criteria

September 13, 2013

Last Verified

September 1, 2013

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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