BACKGROUND: @entity28 is associated with significantly elevated rates of @entity2143 complications, adverse perinatal outcomes and interventions. The purpose of this study was to determine the prevalence, risk factors, management and perinatal outcomes of @entity28 @entity1 giving birth in Australia. METHODS: A national population-based cohort study. @entity28 pregnant @entity1 (body mass index (BMI) >50  kg/m(2) or weight >140  kg) who gave birth between January 1 and October 31, 2010 and a comparison cohort were identified using the Australasian Maternity Outcomes Surveillance System (AMOSS). Outcomes included maternal and perinatal morbidity and mortality. Prevalence estimates calculated with 95  % confidence intervals (CIs). Adjusted odds ratios (ORs) were calculated using multivariable logistic regression. RESULTS: 370 @entity28 @entity1 with a median BMI of 52.8  kg/m(2) (range 40.9-79.9  kg/m(2)) and prevalence of 2.1 per 1 000 @entity1 giving birth (95  % CI: 1.96-2.40). @entity28 @entity1 were significantly more likely to be public @entity1 (96.2  %), smoke (23.8  %) and be socio-economically disadvantaged (36.2  %). Compared with other @entity1 , @entity28 @entity1 had a significantly higher risk for @entity2143 (adjusted odds ratio (AOR) 2.42, 95  % CI: 1.77-3.29) and medical (AOR: 2.89, 95  % CI: 2.64-4.11) complications during pregnancy, birth by caesarean section (51.6  %) and admission to special care (HDU/ICU) (6.2  %). The 372 babies born to 365 @entity28 @entity1 with outcomes known had significantly higher rates of birthweight >= 4500  g (AOR 19.94, 95 % CI: 6.81-58.36), hospital transfer (AOR 3.81, 95 % CI: 1.93-7.55) and admission to Neonatal Intensive Care Unit (NICU) (AOR 1.83, 95 % CI: 1.27-2.65) compared to babies of the comparison group, but not prematurity (10.5  % versus 9.2  %) or perinatal mortality (11.0 (95  % CI: 4.3-28.0) versus 6.6 (95  % CI: 2.6- 16.8) per 1 000 singleton births). CONCLUSIONS: @entity28 in pregnancy in Australia is associated with increased rates of pregnancy and birth complications, and with social disadvantage. There is an urgent need to further address risk factors leading to super- @entity28 among pregnant @entity1 and for maternity services to better address pre-pregnancy and pregnancy care to reduce associated inequalities in perinatal outcomes.

XXXX and perinatal outcomes in Australia: a national population-based cohort study.

@entity1 :: ('9606', 'Species') :: ['women', 'patients'] @entity2143 :: ('MESH:D048949', 'Disease') :: ['obstetric'] @entity28 :: ('MESH:D009765', 'Disease') :: ['Super-obesity', 'super-obese', 'Super-obese', 'obesity']
@entity28 :: (MESH:D009765,Disease) :: ['Maternal super-obesity']
