Statistics and Indicators

BMI, healthy weight, adults

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    Healthy weight BMI category, 18 years and over, ACT General Health Survey, 2011 - 2021

    Body Mass Index (BMI) is a simple index of weight-for-height that is commonly used to classify underweight, healthy weight, overweight and obesity. 

    BMI for adults aged 18 years and over are grouped as follows:

    Underweight: BMI less than 18.5
    Healthy weight: BMI 18.5 - 24.99
    Overweight: BMI 25.00 - 29.99
    Obese class 1: BMI 30.00 -  34.99
    Obese class 2: BMI 35.00 - 39.99
    Obese class 3: BMI 40 or more

    Source: https://www.abs.gov.au/AUSSTATS/abs@.nsf/Lookup/4363.0Glossary12017-18?OpenDocument.

    Between 2020 and 2021, the proportion of ACT General Health Survey respondents aged 18 years and over who were a healthy weight has remained stable (2020: 38.7%; 2021: 36.1%).  In 2021, males (33.5%) were slightly less likely to report being a healthy weight than females (38.7%), however this difference was not statistically significant. 

    BMI is based on self-reported height and weight. To calculate BMI, weight in kilograms was divided by the square of height in metres.

    For the purpose of reporting the ACT General Health Survey data on HealthStats, if the 95% confidence intervals of the estimates do not overlap, they are considered to be significantly different.  

    Note: The indicator shows self-reported data collected through Computer Assisted Telephone Interviewing (CATI). Estimates were weighted to adjust for differences in the probability of selection among respondents and were benchmarked to the estimated residential population using the latest available Australian Bureau of Statistics population estimates.

    Persons includes male, female, other and refused sex respondents and may not always add to the sum of male and female.

    Statistically significant differences are difficult to detect for smaller jurisdictions such as the Australian Capital Territory. Sometimes, even large apparent differences may not be statistically significant. This is particularly the case in breakdowns of small populations because the small sample size means that there is not enough power to identify even large differences as statistically significant.

    To access the data please click on the "View source data" link at the bottom of the visualisation. This link will open up a data table that you can download.