Background
Preterm deliveries in Aotearoa New Zealand
Design
Outcome measures
Primary outcomes
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Death, up to 1 year post birth
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Brain injury (defined as periventricular and/or cerebellum haemorrhage and/or Periventricular Leucomalacia (PVL))
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Chronic lung disease of infancy (Bronchopulmonary BPD subtype)
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Oxygen and/or tube feeding on discharge
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Length of stay (LOS) (until first discharge home) at hospital > 4 months
Secondary outcomes
Study population
Inclusion criteria
Exclusion criteria
Data sources
National health and clinical information collections in Aotearoa New Zealand
Dataset | Type of information | Examples of variables extracted |
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National health index | Sociodemographic | NHI number, area deprivation, ethnicity |
Mortality collection | Mortality | Ethnicity, date of death, gestational age at termination of pregnancy, birth-weight, diagnostic codes on cause of death, sudden and unexpected death indicator |
National maternity collection | Pregnancy and delivery information | Maternal ethnicity, maternal height and weight at time of booking with a maternity care provider, maternal smoking status at time of booking with maternity care provider, plurality, parity, mode of delivery, Apgar at 5 min, birth weight, gestational age at delivery |
National minimum dataset | Hospital events | Ethnicity, maternal and/or infant hospital admissions (public) and discharge dates, length of stay, diagnostic (ICD-10) codes |
Australia New Zealand Neonatal network | Neonatal intensive care | Ethnicity, corticosteroid administration before delivery, length of stay, neonatal surgery, corrected gestational age on discharge, oxygen on discharge, enteral tube feeding on discharge (e.g. nasogastric tube) |
Local hospital (DHB specific) | Pregnancy and delivery events | Maternal and paternal ethnicity, obstetric history, plurality, parity, date of admission, date of delivery |
Community laboratory | Screening and diagnostics | Antenatal booking screening (e.g. blood count), gestational diabetes screening, sexually transmitted infection (note: only if screened and not results) |
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born at less than 32 weeks gestation, or
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weighed less than 1500 g at birth, or
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received assisted ventilation (mechanical ventilation) including intermittent positive pressure ventilation (IPPV) or continuous positive airways pressure (CPAP) or high flow nasal cannulae for four or more consecutive hours, or died while receiving mechanical ventilation prior to 4 hours of age, or
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received major surgery (surgery that involved opening a body cavity), or
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received therapeutic hypothermia