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4324.0.55.002 - Microdata: Australian Health Survey: Nutrition and Physical Activity, 2011-12 Quality Declaration 
Latest ISSUE Released at 11:30 AM (CANBERRA TIME) 18/12/2013  First Issue
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FILE STRUCTURE

Information from the survey was stored electronically in the form of data items. In some cases items were formed directly from individual survey questions, while in others items were derived from answers to several questions (e.g. Body Mass Index derived from measured height and weight). Some items were derived with reference to information from other organisations such as the Department of Health (e.g. in relation to guidelines on time undertaking physical activity per week).

Datasets from the Australian Health Survey are hierarchical in nature. A hierarchical data file is an efficient means of storing and retrieving information which describes one to many, or many to many, relationships; e.g. children 5-17 years may report multiple days on which they participated in physical activity and also multiple types of activities on each of these days.

The data items and related output categories currently available for the National Nutrition and Physical Activity Survey TableBuilder database, Basic CURF and Expanded CURF are available in Excel spreadsheet format from the Downloads page of this product.

The following table shows the levels available in each microdata product and the information contained on those levels:

TableBuilderBasic CURFExpanded CURFInformation contained on level

1. Household levelXXGeographic classifications, household size and structure and household income details
2. Persons in household levelXXBasic demographic and relationship details of all members of households, including selected persons
3. Person levelXXXDemographic and socio-economic characteristics of survey respondents, and much of the physical activity, nutrition and health information. For the Basic CURF only this level contains geographic classifications and household details.
4. Condition levelXXSelected health conditions reported by respondents
5. Child 2-4 years physical activity day levelXXPhysical and sedentary activities undertaken on the seven days prior to interview for children aged 2-4 years
6. Child 5-17 years physical activity day levelXXPhysical and sedentary activities undertaken on the seven days prior to interview for children aged 5-17 years
7. Child 5-17 years physical activity detailedXXDetailed information about the physical activities undertaken each day on the seven days prior to interview for children aged 5-17 years
8. Adult physical activity levelXXDetailed information about the physical activities undertaken for persons aged 18 years and over
9. Pedometer levelXXNumber of steps and time wore the pedometer for up to eight days reported by the respondents
10. Biomedical levelXPathology test information for markers of chronic disease such as blood sugar levels, cholesterol and kidney function, markers of nutritional status, as well as markers of exposure to chemicals such as nicotine
11. Food levelXXFood intake details on the day prior to the interview and on a second day for respondents that completed the follow-up interview (CATI)
12. Supplement levelXXDietary supplement intake details on the day prior to the interview and on a second day for respondents that completed the follow-up interview (CATI)



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