Gestational age, mode of birth and breastmilk feeding all influence acute early childhood gastroenteritis: a record-linkage cohort study.
Acute gastroenteritis (AGE) is a leading cause of infectious morbidity in childhood. Clinical studies have implicated caesarean section, early birth and formula feeding in modifying normal gut microbiota development and immune system homeostasis in early life. Rates of early birth and cesarean delivery are also increasing worldwide. This study aimed to investigate the independent and combined associations of the mode and timing of birth and breastmilk feeding with AGE hospitalisations in early childhood.



Population-based record-linkage study of 893,360 singleton livebirths of at least 33 weeks gestation without major congenital conditions born in hospital, New South Wales, Australia, 2001-2011. Using age at first AGE hospital admission, Cox-regression was used to estimate the associations for gestational age, vaginal birth or caesarean delivery by labour onset and formula-only feeding while adjusting for confounders.



There were 41,274 (4.6 %) children admitted to hospital at least once for AGE and the median age at first admission was 1.4 years. Risk of AGE admission increased with decreasing gestational age (37-38 weeks: 15 % increased risk, 33-36 weeks: 25 %), caesarean section (20 %), planned birth (17 %) and formula-only feeding (18 %). The rate of AGE admission was highest for children who were born preterm by modes of birth other than vaginal birth following the spontaneous onset of labour and who received formula-only at discharge from birth care (62-78 %).



Vaginal birth following spontaneous onset of labour at 39+ weeks gestation with any breastfeeding minimised the risk of gastroenteritis hospitalisation in early childhood. Given increasing trends in early planned birth and caesarean section worldwide, these results provide important information about the impact obstetric interventions may have on the development of the infant gut microbiota and immunity.
Clinical and Population Perinatal Health Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia. jben9630@uni.sydney.edu.au.|University Department of Obstetrics, Building 52, Royal North Shore Hospital, St Leonards, NSW, 2065, Australia. jben9630@uni.sydney.edu.au.
Jason P
JP
Bentley
Sydney School of Public Health, University of Sydney, Sydney, NSW, Australia.
Judy M
JM
Simpson
Clinical and Population Perinatal Health Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia.|Department of Neonatology, Royal North Shore Hospital, Sydney, NSW, Australia.
Jenny R
JR
Bowen
Clinical and Population Perinatal Health Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia.
Jonathan M
JM
Morris
Clinical and Population Perinatal Health Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia.
Christine L
CL
Roberts
Clinical and Population Perinatal Health Research, Kolling Institute, University of Sydney, Sydney, NSW, Australia.
Natasha
N
Nassar
D000208:Acute Disease; D001942:Breast Feeding; D002585:Cesarean Section / Q000009:adverse effects; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D036861:Delivery, Obstetric / Q000009:adverse effects* / Q000379:methods; D005260:Female; D005759:Gastroenteritis / Q000453:epidemiology / Q000209:etiology*; D005865:Gestational Age; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D007223:Infant; D041943:Infant Formula / Q000009:adverse effects*; D007231:Infant, Newborn; D007234:Infant, Premature; D007235:Infant, Premature, Diseases / Q000453:epidemiology / Q000209:etiology*; D008297:Male; D008498:Medical Record Linkage; D009517:New South Wales / Q000453:epidemiology; D047928:Premature Birth; D016016:Proportional Hazards Models; D065840:Protective Factors; D012307:Risk Factors
Acute gastroenteritis; Breastfeeding; Caesarean section; Child; Early term birth; Healthy start to life