The Auckland Stillbirth Study
Well, we have been going for over a year now and already there are some interesting things beginning to emerge from this study. But first, for those that don't know, what is the Auckland Stillbirth Study (or TASS for short)? The study aims to gain a greater understanding of third trimester stillbirth in order to help reduce the incidence of this tragic event.
Why study risks for stillbirth? In New Zealand there are more than 600 perinatal deaths each year, that is 30 per cent higher than the road toll and 14 times the cot death rate. The rate of stillbirth in New Zealand (as in other developed countries is no longer declining, and over the last few years appears to be rising again.
Around 200 of these babies die in the third trimester, at a time when if the baby was born it would have a high chance of survival. If we can better predict which babies might be at greatest risk, then we might be able to manage those pregnancies accordingly. However, we are currently not so good at predicting which pregnancy is at risk, in fact we often do not know why the baby died at all. This is partly due to our low post mortem rate in New Zealand (and especially South Auckland) but even with post mortem we at times do not have an explanation for the death.
What does the study involve? The study is being conducted across all 3 Auckland DHB's for 3 years (we started in July 2006). We seek to recruit women who have experienced a third trimester stillbirth (in a singleton pregnancy without major congenital abnormality). If the woman agrees to take part then I contact her and arrange a time for the interview, this takes about 1 to 1 and a half hours and I do it in her home (unless she wants to meet elsewhere).
The interview covers a wide range of questions from general health, sleep patterns, stress to fetal movements and family violence. This is a case control study, so we
You may have already heard from me, either because of a woman you are caring for who has had a fetal loss, or to help me in the recruitment of controls. THANK YOU to all those who have helped so far in this study, couldn't do it without you.
Preliminary demographic results: During the first year there were 74 eligible cases (32 of them in CMDHB) The post mortem rate at CMDHB (for those in the study is about 22% (compared to over 50% at the other DHB's...perhaps it is an area that is worth us thinking about). 53 of them consented to be part of the study. Stillborn babies are more likely to be small for gestational age with 36% of them being under the 10th percentile (using customised charts) and only 4% of controls being small. Women who have a high body mass index (over 30( at the beginning of pregancy also appear to be at almost twice the risk of stillbirth. Women of European ethnicity have a reduced risk and those of Pacific Island an increased risk (we don't know as yet how much this is related to obesity, something we hope to explore with this study). Maori women do not as yet appear to have a significant risk either way. ...watch out for big mothers and small babies!
The other study investigators are:
Thank you again for all those who have helped with recruitment and data collection. Do feel free to contact me if you want any more information on the study.
Tomasina t.stacey@auckland.ac.nz