Plain English Summary
Background and study aims
Evidence from the last influenza pandemic in 2009 showed that pregnant women were particularly vulnerable to severe infection. The aims of this study are, in a future influenza pandemic, to estimate the incidence of hospitalisation with pandemic-type influenza in pregnancy, and to describe the outcomes of pregnancy particularly in relation to specific treatments and according to whether women have received influenza immunisation.
Who can participate?
We anticipate collecting anonymous data on approximately 500 women with influenza in pregnancy in a future pandemic.
What does the study involve?
This study will collect anonymous data only. The cohort of pregnant women infected with influenza will be identified through the UK Obstetric Surveillance System (UKOSS) network of nominated reporting clinicians in each consultant maternity unit in the UK. Doctors and midwives will be asked to report anonymous details of pregnant women with confirmed pandemic influenza admitted to their unit. Each month throughout the study, the information collected will be analysed to describe the pregnancy and other outcomes for women and their babies and to describe their treatment. These data will be compared with previously collected information about women who do not have influenza in pregnancy. These analyses will be used to develop guidance for prevention and treatment during the pandemic.
What are the possible benefits and risks of participating?
There will be no benefit to individual women of inclusion of their anonymous data in the study. However, the information will be used to improve care for women and babies in the future.
This study will collect anonymous data only, after women have been admitted to hospital and treated. There are thus no risks to participants.
Where is the study run from?
The study will run from the National Perinatal Epidemiology Unit, University of Oxford.
When is the study starting and how long is it expected to run for?
The study was funded in 2012, but will only be activated in the event that there is a new influenza pandemic.
Who is funding the study?
Funding has been provided by the National Institute for Health Research Health technology Assessment programme (NIHR HTA).
Who is the main contact?
Professor Marian Knight
HTA: 11/46/12, Version 3 12/09/12
Maternal and perinatal outcomes of pandemic influenza in pregnancy: a cohort study
The hypothesis of this study is that in a future influenza pandemic, pregnant women will be at increased risk of poor maternal and pregnancy outcomes, and a rapid study of this susceptible group will be important to inform both ongoing preventive and management policies.
Further details of the UK-wide Obstetric Surveillance System (UKOSS) which will be used to collect these data can be found on www.npeu.ox.ac.uk/ukoss
More details can be found at http://www.hta.ac.uk/2887
Study protocol can be found at http://www.hta.ac.uk/2887
NRES Committee East Midlands - Nottingham, 11/09/2012, ref: 12/EM/0365
Primary study design
Secondary study design
Patient information sheet
There is no participant information sheet for this study as it uses anonymous data only.
Pandemic influenza in pregnancy
Observational study of pregnancy outcomes in women hospitalised with the pandemic influenza. Outcomes following extra corporeal membrane oxygenation (ECMO) and influenza immunisation will be described.
Primary outcome measures
Incidence of hospitalisation with pandemic influenza in pregnancy
Secondary outcome measures
1. Maternal death
2. Level 3 critical care unit admission
3. Other major complication
4. Preterm birth
5. Congenital anomaly
7. Early neonatal death
8. Perinatal death
Overall trial start date
Overall trial end date
Participant inclusion criteria
The cohort will be all pregnant women in the UK admitted to hospital with confirmed pandemic influenza
Target number of participants
Participant exclusion criteria
Women not meeting the inclusion criteria will be excluded
Recruitment start date
Recruitment end date
Countries of recruitment
Trial participating centre
National Perinatal Epidemiology Unit
University of Oxford (UK)
Joint Research Office
NIHR Health Technology Assessment Programme - HTA (UK) ref: 11/46/12
Funding Body Type
Funding Body Subtype
Results and Publications
Publication and dissemination plan
Not provided at time of registration
Intention to publish date
Participant level data
Not provided at time of registration
Results - basic reporting