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

  • The majority (83.4%) of women who gave birth in South Australia in 2017 had their first antenatal visit within the first 14 weeks of pregnancy.1
  • The rate for Aboriginal women is lower at 63.3%.1
  • 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, 2017
Aboriginal status %
Aboriginal 63.3%
Non-Aboriginal 84.1%
South Australia 83.4%
Australia n.a.

2-4-1

Data source: SA Health 2019a

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2-4-2. Smoking during pregnancy

  • Data for 2017 shows that around one in nine (11.3%) women who gave birth in South Australia reported being smokers at their first antenatal visit.2
  • To enable interstate comparison, this rate includes women who reported smoking during pregnancy, but had quit before their first antenatal visit.2
  • The proportion of women smoking at the first antenatal visit (including quitters) continues to decline since 2007. In 2007 the state rate was 20.9%.2
  • The corresponding rate for Aboriginal women also continues to decline, down from 65.1% in 2007 to 47.6% in 2017
  • Data for 2017 shows a drop in reported smoking rates between the first antenatal visit and second half of pregnancy.2
  • Less than one in ten (6.8%) women who gave birth in South Australia report being smokers in the second half of their pregnancy, 4.5 percentage points lower than the 11.3% who reported smoking at (or before) their first antenatal visit.2
  • However, South Australia ranks forth-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.3
  • Data for 2017 shows that the state rate of 11.3% is above the national average of 9.9%.3

 

Smoking rate at first antenatal visit, 2017
Aboriginal status %
Aboriginal 47.6%
Non-Aboriginal 9.8%
South Australia 11.3%
Australia 9.9%

2-4-2 visit 1

Data source: SA Health 2019b (SA data) and AIHW 2018a (Aust. data)

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Smoking rate in second half of pregnancy, 2017
Aboriginal status %
Aboriginal 36.5%
Non-Aboriginal 5.7%
South Australia 6.8%
Australia n.a.

2-4-2 visit 2

Data source: SA Health 2019b

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Smoking rate at first antenatal visit, 2017
State/Territory %
Australian Capital Territory 6.2%
New South Wales 8.9%
Western Australia 8.9%
Victoria 9.0%
South Australia 11.3%
Queensland 11.9%
Tasmania 14.5%
Northern Territory 20.6%
Australia 9.9%

2 4 2 states and territories

Data source: AIHW 2018a

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2-4-3. Gestational diabetes

  • There has been a roughly tripling in the prevalence of gestational diabetes among women who give birth in South Australia over the last decade of collected data.
  • In 2007, 4.9% of women who gave birth in South Australia experienced gestational diabetes as an obstetric complication.4
  • In 2017 the prevalence was 13.7%.4

 

Gestational diabetes, 2017
Region % of women
who gave birth
Metro. Adelaide n.a.
Country SA n.a.
South Australia 13.7%
Australia n.a.

2-4-3

Data Source: SA Health 2019c

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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 2017, over a quarter (27.7%) of women in South Australia who gave birth were recorded as being overweight during their pregnancy, above the national average of 26.2%.5
  • At the same time, a slightly lower proportion (24.9%) were recorded as being obese although again this was above the national average of 21.0%.5
  • Over the last six 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, South Australia is ranked second highest for overweight and obesity in pregnancy. However, readers should note that figures may not be directly comparable between jurisdictions due to differences in how and when data was collected.

 

Overweight in pregnancy, 2017
Region %
Metropolitan Adelaide n.a.
Country SA n.a.
South Australia 27.7%
Australia 26.2%

2-4-4 overweight time series

Data source: AIHW 2018b

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Obesity in pregnancy, 2017
Region %
Metropolitan Adelaide n.a.
Country SA n.a.
South Australia 24.9%
Australia 21.0%

2-4-4 obesity time series

Data source: AIHW 2018b

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Overweight in pregnancy, 2017
State/Territory %
Queensland 23.4%
Tasmania 26.7%
Australian Capital Territory 26.7%
Victoria 26.9%
South Australia 27.7%
Western Australia 28.2%
New South Wales n.a.
Northern Territory n.a.
Total 26.2%

2-4-4 overweight states and territories

New South Wales and Northern Territory excluded in source dataset.

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

Data source: AIHW 2018b


Obesity in pregnancy, 2017
State/Territory %
Victoria 20.1%
Western Australia 20.3%
Australian Capital Territory 20.5%
Queensland 20.8%
South Australia 24.9%
Tasmania 26.1%
New South Wales n.a.
Northern Territory n.a.
Total 21.0%

2-4-4 obesity states and territories

New South Wales and Northern Territory excluded in source dataset.

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

Data source: AIHW 2018b


Sources

  1. Based on Pregnancy Outcome Unit, SA Health (SA Health 2019a), Government of South Australia 2019, 'Table 15: Gestation at first antenatal visit, women who gave birth by Aboriginal status, South Australia, 2017', Pregnancy Outcome in South Australia 2017, Pregnancy Outcome Unit, Prevention and Population Health Branch, SA Health, Government of South Australia 2019, viewed 29 May 2020.
  2. Based on Pregnancy Outcome Unit, SA Health (SA Health 2019b), Government of South Australia 2019, 'Table 9: Tobacco smoking status at first antenatal visit by Aboriginal status, South Australia, 2017' and 'Table 11: Tobacco smoking status in second half of pregnancy by Aboriginal status, South Australia, 2017', Pregnancy Outcome in South Australia 2017, Pregnancy Outcome Unit, Prevention and Population Health Branch, SA Health, Government of South Australia 2019, viewed 29 May 2020.
  3. Based on Australian Institute of Health and Welfare (AIHW 2019a) National Perinatal Data Collection, 'Table 14a: Trends for smoking anytime in pregnancy by selected maternal characteristics, 2007 to 2016', Antenatal period module, Perinatal data portal, accessed 30 September 2019.
  4. Based on Pregnancy Outcome Unit, SA Health (SA Health 2019c), Government of South Australia 2019, 'Table 18: Most common obstetric complications in current pregnancy, women who gave birth, South Australia, 2017',Pregnancy Outcome in South Australia 2017, Pregnancy Outcome Unit, Prevention and Population Health Branch, SA Health, Government of South Australia 2019, viewed 29 May 2020.
  5. Based on Australian Institute of Health and Welfare (AIHW 2019b), 'Table 2.17: Body mass index (BMI) by selected characteristics of women who gave birth, 2016', Antenatal period module, Perinatal data portal, accessed 30 September 2019.