3-9

3-9. Overweight and Obesity

Introduction

3-9-1. Overweight and Obesity in South Australia – by Local Health Network

3-9-2. Overweight and Obesity in South Australia – by age and sex

3-9-3. Overweight and Obesity in South Australia – by socio-economic status

3-9-4. Overweight and Obesity in Australia – by state and territory

3-9-5. Overweight and Obesity – Aboriginal people

Sources

 

Introduction

Body mass index (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 an adult is 18.5 to 24.9 kg/m2. 'Overweight' is defined by the World Health Organisation as a BMI in the range of 25 to less than 30. 'Obesity' is a BMI of 30 or higher.

For overweight and obesity rates in children, please refer to Chapter 2-11.

 

3-9-1. Overweight and Obesity in South Australia – by Local Health Network

  • In 2016, around two-thirds (61.4%) of South Australians aged 18 years or more were either overweight or obese1.
  • The rate varies moderately between the three metropolitan Adelaide Local Health Networks (LHNs)1.
  • The overweight/obesity rate among Country SA residents (67.0%) is statistically significantly higher than the metropolitan Adelaide rate (59.1%)1.
  • Over the last decade the rates of overweight and obesity in both metropolitan Adelaide and Country SA have statistically significantly increased1.

 

Overweight or obese (aged 18+ years), 2016
Local Health Network %
Northern Adelaide LHN 59.4%
Central Adelaide LHN 59.6%
Southern Adelaide LHN 58.2%
Metropolitan Adelaide 59.1%
Country SA LHN 67.0%
South Australia 61.4%
Australia n.a.

3-9-1

Data source: SA Health 2017

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3-9-2. Overweight and Obesity in South Australia – by age and sex

  • In 2016, the proportion of males aged 18 years and over who were overweight or obese (64.6%) was substantially higher than the corresponding female rate (58.4%)1.

 


Overweight or obese (aged 18+ years), 2016
Age (years) Males Females
18-24 22.7% 22.1%
25-34 59.3% 49.3%
35-44 80.2% 60.1%
45-54 80.1% 70.5%
55-64 71.2% 65.9%
65-74 74.4% 73.4%
75+ 57.7% 59.1%
All ages 64.6% 58.4%

3-9-2

Data source: SA Health 2017

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3-9-3. Overweight and Obesity in South Australia – by socio-economic status

  • There is a statistically significant inverse correlation between the proportion of people aged 18 years and over who are classified as overweight or obese and the socio-economic status of the area in which they live1.

 

Overweight or obese (aged 18+ years), 2016
Socio-economic status (SES) %
Lowest SES 68.8%
Low SES 63.9%
Middle SES 62.3%
High SES 60.9%
Highest SES 51.0%

3-9-3

Data source: SA Health 2017

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3-9-4. Overweight and Obesity in Australia – by state and territory

  • The data below comes from the Australian Bureau of Statistics' 2014-15 National Health Survey. It is therefore not directly comparable to the 2016 information presented in 3-9-1 to 3-9-3 above which is sourced via the South Australian Monitoring and Surveillance System.
  • However, the national survey does largely corroborate the state-specific survey, with 64.5% (age standardised) of South Australians aged 18 years and over reporting a BMI that classifies them as overweight or obese2.
  • Nationally, the South Australian overweight/obesity rate is slightly above the Australia-wide average of 62.8% (age standardised), and is ranked third-highest of the states and territories2.

 


Overweight or obese (aged 18+ years), 2014-15, age standardised
State/Territory %
Western Australia 60.3%
New South Wales 62.6%
Victoria 62.8%
Queensland 63.3%
Australian Capital Territory 63.5%
South Australia 64.5%
Northern Territory 64.6%
Tasmania 65.9%
Australia 62.8%

3-9-4

Data source: ABS 2015

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3-9-5. Overweight and Obesity – Aboriginal people

  • In 2012-13, 62.9% of Aboriginal people in South Australia aged 15 years and older had a BMI classified as overweight or obese3.
  • Although not strictly comparable, this is lower than the 64.5% overweight/obesity rate recorded for all South Australians aged 18 years or more in the ABS 2014-15 National Health Survey (see 3-9-4 above)3.
  • South Australia's overweight/obesity rate among Aboriginal people is below the national average for Aboriginal people (65.6%)3.

 


Aboriginal people overweight or obese (aged 15+ years), 2012-13
State/Territory %
Northern Territory 53.7%
Australian Capital Territory 58.3%
South Australia 62.9%
Tasmania 63.7%
Victoria 64.4%
Queensland 65.7%
Western Australia 66.7%
New South Wales 70.6%
Australia 65.6%

3-9-5

Data source: ABS 2013

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Sources

  1. Based on South Australian Monitoring and Surveillance System customised extract 2017, Population Health Surveys, SA Health, Adelaide.
  2. Based on Australian Bureau of Statistics (ABS 2015), 'Table 2.3 Summary health characteristics – States and territories, Proportion of persons', National Health Survey: First Results, 2014-15, cat. no. 4364.0.55.001, viewed 17 March 2016.
  3. Based on Australian Bureau of Statistics (ABS 2013), 'Table 3.3 Selected health characteristics, by State/Territory – 2012-13, Proportion of Aboriginal and Torres Strait Islander persons', Australian Aboriginal and Torres Strait Islander Health Survey: First Results, 2012-13, cat no 4727.0.55.001, viewed 2 September 2015.