Using linkage of state maternity and perinatal death data collections the authors assessed risk factors for antepartum stillbirth in New South Wales Australia for births between 2002 – 2006 (n = 327,690) using a Cox proportional hazards model.
The observation period ended at the earliest of the following dates: turning 14 (Pedianet) or 18 years of age, transfer out of the practice or insurance system, death, or last data collection.
The cohort members were followed from 1 July 2005 until the earliest of: first code of IBD, migration out of practice, death, or last data collection up to 31 October 2008.
Moreover, to carry out a validation study of cause-of-death data collection in hospitals, a gold standard framework is required, against which the hospital cause-of-death reports can be compared [ 29].
Maternal death review is based on the surveillance cycle which consists of identification of maternal deaths, data collection and interviews, analysis of findings, recommendations and action, evaluation and refinement.
Follow-up was censored at the earliest of the outcome of interest, transfer out of the practice, last data collection or death.
Patients left the study at the earliest date of death, leaving the practice, last data collection from the practice, renal replacement therapy (dialysis or kidney transplantation), or March 31 , 2011
Patients were followed from the index date until the earliest of the respective outcome of interest, transfer out of the practice, last data collection or death, whichever date came first.
