2-4

2-4. Pregnancy outcomes

2-4-1. Antenatal visits

2-4-2. Smoking during pregnancy

2-4-3. Gestational diabetes

2-4-4. Overweight and obesity in pregnancy

Sources

 

2-4-1. Antenatal visits

  • More than four in five (80.8%) women who gave birth in South Australia in 2013 had their first antenatal visit within the first 14 weeks of pregnancy.
  • The rate for Aboriginal women is significantly lower, at just over half (53.4%).
  • The overall trend for Aboriginal and non-Aboriginal women has been trending up since 2007 when this time series began.

 

Antenatal visit within first 14 weeks of pregnancy, 2013
Aboriginal status%
Aboriginal53.4%
Non-Aboriginal81.7%
South Australia80.8%
Australian.a.

2-4-1 SA

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2-4-2. Smoking during pregnancy

  • Data for 2013 shows that around one in seven (14.5%) women who gave birth in South Australia reported being smokers at their first antenatal visit.
  • To enable interstate comparison, this rate includes women who reported smoking during pregnancy, but had quit before their first antenatal visit.
  • The proportion of women smoking at the first antenatal visit (including quitters) continues to decline since 2006 when this time series (with Aboriginal and non-Aboriginal comparisons) began. In 2006 the state rate was 22.3%.
  • The corresponding rate for Aboriginal women also continues to decline, down from 60.8% in 2006 to 51.5% in 2013.
  • Data for 2013 shows a drop in reported smoking rates between the first antenatal visit and second half of pregnancy.
  • Less than one in ten (9.8%) women who gave birth in South Australia report being smokers in the second half of their pregnancy, 4.7 percentage points lower than the 14.5% who reported smoking at (or before) their first antenatal visit.
  • However, South Australia ranks third-highest compared to the other states and territories for proportion of women who gave birth who reported being smokers during their pregnancy at their first antenatal visit.
  • The state rate of 14.5% is above the national average of 11.7%.

 

Smoking rate at first antenatal visit, 2013
Aboriginal status%
Aboriginal51.5%
Non-Aboriginal13.1%
South Australia14.5%
Australia11.7%

2-4-2a

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Smoking rate in second half of pregnancy, 2013
Aboriginal status%
Aboriginal43.7%
Non-Aboriginal8.5%
South Australia9.8%
Australian.a.

2-4-2b

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Smoking rate at first antenatal visit, 2013
State/Territory%
Australian Capital Territory6.1%
New South Wales9.7%
Western Australia10.8%
Victoria11.2%
Queensland14.2%
South Australia14.5%
Tasmania16.7%
Northern Territory23.4%
Australia11.7%

2-4-2 AU

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2-4-3. Gestational diabetes

  • There has been a significant increase in the prevalence of gestational diabetes among women who give birth in South Australia over the last decade of collected data.
  • In 2003, 3.5% of women who gave birth in South Australia experienced gestational diabetes as an obstetric complication.
  • By 2013, the prevalence in this state had more than doubled to 8.2%.

 

Gestational diabetes, 2013
Region% of women
who gave birth
Metro. Adelaiden.a.
Country SAn.a.
South Australia8.2%
Australian.a.

2-4-3 SA

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2-4-4. Overweight and obesity in pregnancy

  • Body mass index, or BMI is a measure of body fat based on the ratio of weight and height (bodyweight in kilograms divided by height in metres squared).
  • The normal range of BMI for non-pregnant women is 18.5 to 24.9 kg/m2.
  • BMI increases are expected in pregnancy. However, a BMI in the range 25.0 to 29.9 at the first antenatal consultation is defined as overweight, while a BMI of 30.0 or more is defined as obesity in pregnancy.
  • In 2013, over a quarter (28.0%) of women in South Australia who gave birth were recorded as being overweight during their pregnancy, above the national average of 26.3%.
  • At the same time, a slightly lower proportion (24.4%) were recorded as being obese although again this was above the national average of 20.3%.
  • Over the last four years for which time series data is available, the trend in overweight and obesity in pregnancy has increased slightly in South Australia but fallen nationally.
  • Of the states and territories that reported data, South Australia is ranked second highest for overweight and highest for obesity in pregnancy. However, readers should note that figures may not be directly comparable between jurisdictions because of differences in how and when data was collected.

 

Overweight in pregnancy, 2013
Region%
Metropolitan Adelaiden.a.
Country SAn.a.
South Australia28.0%
Australia26.3%

2-4-4 SA overweight

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Obesity in pregnancy, 2013
Region%
Metropolitan Adelaiden.a.
Country SAn.a.
South Australia24.4%
Australia20.3%

2-4-4 SA obese

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Overweight in pregnancy, 2013
State/Territory%
Queensland23.3%
Australian Capital Territory23.6%
Tasmania24.9%
Victoria27.6%
South Australia28.0%
Western Australia28.8%
New South Walesn.a.
Northern Territoryn.a.
Australia26.3%

2-4-4 AU overweight

N.B. figures may not be directly comparable between jurisdictions due to differences in how and when data was collected.


Obesity in pregnancy, 2013
State/Territory%
Australian Capital Territory17.9%
Queensland19.0%
Victoria20.1%
Western Australia20.7%
Tasmania23.4%
South Australia24.4%
New South Walesn.a.
Northern Territoryn.a.
Australia20.3%

2-4-4 AU obese

N.B. figures may not be directly comparable between jurisdictions due to differences in how and when data was collected.


Sources

  1. Based on Pregnancy Outcome Unit, SA Health, Government of South Australia 2015, 'Table 9a: Gestation at first antenatal visit, women who gave birth, by race, South Australia, 2013', Pregnancy Outcome in South Australia 2013, Scheil W, Jolly K, Scott J, Catcheside B, Sage L, Kennare R, viewed 11 March 2016.
  2. Based on Pregnancy Outcome Unit, SA Health, Government of South Australia 2015, 'Table 10a: Tobacco smoking status at first antenatal visit, non-Aboriginal and Aboriginal women who gave birth, South Australia, 2013' and 'Table 10b: Average number of tobacco cigarettes smoked per day in the second half of pregnancy, non-Aboriginal and Aboriginal women who gave birth, South Australia, 2013', Pregnancy Outcome in South Australia 2013, Scheil W, Jolly K, Scott J, Catcheside B, Sage L, Kennare R, viewed 11 March 2016.
  3. Based on AIHW National Perinatal Data Collection, 'Table 6 Smoking anytime in pregnancy, by selected characteristics of women who gave birth in 2013', Antenatal period module, Perinatal data portal, accessed 8 March 2016.
  4. Based on Pregnancy Outcome Unit, SA Health, Government of South Australia 2015, 'Table 12: Frequency of some obstetric complications, women who gave birth, South Australia, 2013', Pregnancy Outcome in South Australia 2013, Scheil W, Jolly K, Scott J, Catcheside B, Sage L, Kennare R, viewed 8 March 2016.
  5. Based on AIHW National Perinatal Data Collection, 'Table 16 Body mass index (BMI), by selected characteristics of women who gave birth in 2013', Antenatal period module, Perinatal data portal, http://www.aihw.gov.au/perinatal-data/, accessed 8 March 2016.