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Definition

Prevalence of overweight and obesity in adults and children.

Indicator Summary

Numerator

Adults: Number of persons aged 18 years or over who are obese or overweight.

Children: Number of persons aged 5–17 years who are obese or overweight.

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Denominator

Adults: Population aged 18 years or over

Children: Population aged 5–17 years

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Computation

Body Mass Index (BMI) is calculated as weight (in kilograms) divided by the square of height (in metres).

For adults, obesity is defined as a BMI of greater than or equal to 30.00 and overweight is defined as a BMI of 25.00–29.99.

For children, obesity is defined as a BMI (appropriate for age and sex) that is likely to be …

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Disaggregation

For each of adults and children, state and territory, by:

  • sex by age (adults only)
  • Indigenous status
  • remoteness (Australian Standard Geographical Classification Remoteness Structure)
  • SEIFA Index of Relative Socio-Economic Disadvantage (IRSD) quintiles
  • BMI category (underweight, normal, overweight, obese)
  • disability status

Nationally, by SEIFA IRSD deciles.

Some disaggregation may result in numbers too small for publication.

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Calculation rules

Computation Rule
Description

Body Mass Index (BMI) is calculated as weight (in kilograms) divided by the square of height (in metres).

For adults, obesity is defined as a BMI of greater than or equal to 30.00 and overweight is defined as a BMI of 25.00–29.99.

For children, obesity is defined as a BMI (appropriate for age and sex) that is likely to be 30.00 or more at age 18 years, and overweight is defined as a BMI (appropriate for age and sex) that is likely to be 25.00–29.99 at age 18 years, based on centile curves. See ABS National Health Survey: Users' Guide Electronic Publication, 2007–08 (ABS Catalogue no. 4363.0.55.001) for BMI values.

Rates are directly age-standardised to the 2001 Australian population.

Excludes pregnant women where identified and people with an unknown BMI.

Analysis by remoteness and Socio-Economic Indexes for Areas (SEIFA) Index of Relative Socio-Economic Disadvantage (IRSD) is based on usual residence of person.

Presented as a percentage.

95% confidence intervals and relative standard errors calculated for rates.

Numerators

Adults: Number of persons aged 18 years or over who are obese or overweight.

Children: Number of persons aged 5–17 years who are obese or overweight.

Denominators

Adults: Population aged 18 years or over

Children: Population aged 5–17 years

Disaggregation

For each of adults and children, state and territory, by:

  • sex by age (adults only)
  • Indigenous status
  • remoteness (Australian Standard Geographical Classification Remoteness Structure)
  • SEIFA Index of Relative Socio-Economic Disadvantage (IRSD) quintiles
  • BMI category (underweight, normal, overweight, obese)
  • disability status

Nationally, by SEIFA IRSD deciles.

Some disaggregation may result in numbers too small for publication.

References

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