Identifying and definitional attributes | |
Metadata item type: | Data Element |
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Short name: | Weight (self-reported) |
METEOR identifier: | 302365 |
Registration status: | Health!, Standard 14/07/2005 Tasmanian Health, Standard 20/12/2016 |
Definition: | A person's self-reported weight (body mass). |
Data Element Concept: | Person—weight |
Value Domain: | Total kilograms NN[N] |
Data element attributes | |
Collection and usage attributes | |
Collection methods: | The method of data collection, e.g. face to face interview, telephone interview or self-completion questionnaire, can affect survey estimates and should be reported. The data collection form should include a question asking the respondent what their weight is. For example, the ABS National Health Survey 1989-90 included the question 'How much do you weigh without clothes and shoes?'. The data collection form should allow for both metric (to the nearest 1 kg) and imperial (to the nearest 1 lb) units to be recorded. If practical, it is preferable to enter the raw data into the data base before conversion of measures in imperial units to metric. However, if this is not possible, weight reported in imperial units can be converted to metric prior to data entry using a conversion factor of 0.454 kg to the lb. Rounding to the nearest 1 kg will be required for measures converted to metric prior to data entry, and may be required for data reported in metric units to a greater level of precision than the nearest 1 kg. The following rounding conventions are desirable to reduce systematic over reporting (Armitage & Berry 1994): nnn.x where x < 5 - round down, e.g. 72.2 kg would be rounded to 72 kg. nnn.x where x > 5 - round up, e.g. 72.7 kg would be rounded to 73 kg. nnn.x where x = 5 - round to the nearest even number, e.g. 72.5 kg would be rounded to 72 kg, while 73.5 kg would be rounded to 74 kg. |
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Comments: | This metadata item is recommended for persons aged 18 years or older. It is recommended for use in population surveys when it is not possible to measure weight. It is recommended that in population surveys, sociodemographic data including ethnicity should be collected, as well as other risk factors including physiological status (e.g. pregnancy), physical activity, smoking and alcohol consumption. Summary statistics may need to be adjusted for these variables. Metadata items currently exist for sex, date of birth, country of birth, Indigenous status and smoking. Metadata items are being developed for physical activity. Presentation of data: Means and 95% confidence intervals, medians and centiles should be reported to one decimal place. Where the sample permits, population estimates should be presented by sex and 5-year age groups. Estimates based on sample surveys may need to take into account sampling weights. For consistency with conventional practice, and for current comparability with international data sets, recommended centiles are 5, 10, 15, 25, 50, 75, 85, 90 and 95. To estimate the 5th and 95th centiles, a sample size of at least 200 is recommended for each group for which the centiles are being specified. For some reporting purposes, it may be desirable to present weight data in categories. It is recommended that 5 kg groupings are used for this purpose. Weight data should not be rounded before categorisation. The following categories may be appropriate for describing the weights of Australian men and women, although the range will depend on the population. The World Health Organization's range for weight is 30–140 kg. Weight < 30 kg 30 kg = Weight < 35 kg 35 kg = Weight < 40 kg ... in 5 kg categories 135 kg = Weight < 140 kg Weight => 140 kg On average, body mass (weight) tends to be underestimated when self-reported by respondents. Data for men and women aged 20–69 years in 1989 indicated that men underestimated by an average of 0.2 kg (sem of 0.05 kg) and women by an average of 0.4 kg (sem of 0.04 kg) (Waters 1993). The extent of underestimation varied with age. |
Source and reference attributes | |
Origin: | National Centre for Monitoring Cardiovascular Disease Australian Institute of Health and Welfare National Health Data Committee |
Relational attributes | |
Related metadata references: | Supersedes Adult—weight (self-reported), total kilograms NN[N] Health!, Superseded 14/07/2005 Is used in the formation of Adult—body mass index (self-reported), ratio NN[N].N[N] Health!, Standard 01/03/2005 National Health Performance Authority (retired), Retired 01/07/2016 Is used in the formation of Child—body mass index (self-reported), ratio NN[N].N[N] Health!, Standard 01/03/2005 Is re-engineered from Weight - self-reported, version 2, DE, NHDD, NHIMG, Superseded 01/03/2005.pdf (20.5 KB) No registration status |
Implementation in Data Set Specifications: | Acute coronary syndrome (clinical) DSS Health!, Superseded 01/10/2008 Acute coronary syndrome (clinical) DSS Health!, Superseded 07/12/2005 Perinatal DSS 2014-15 Health!, Superseded 13/11/2014 Implementation start date: 01/07/2014 Implementation end date: 30/06/2015 Conditional obligation: It is preferable to collect and record a pregnant woman's weight as a measured weight. Where a measured weight has not been provided or it is not possible to ascertain whether the weight has been measured or self-reported, the value 999.9 should be recorded against the measured weight data item to indicate this. Data should then be recorded against this conditional self-reported weight item. DSS specific information: Weight rounded to the nearest whole kilogram is acceptable. Weight should be recorded in the first trimester, preferably as a measured weight. However, the woman's self-reported weight around the time of conception is acceptable if a measured weight is not available. Perinatal DSS 2015-16 Health!, Superseded 04/09/2015 Implementation start date: 01/07/2015 Implementation end date: 30/06/2016 Conditional obligation: It is preferable to collect and record a pregnant woman's weight as a measured weight. Where a measured weight has not been provided or it is not possible to ascertain whether the weight has been measured or self-reported, the value 999.9 should be recorded against the measured weight data item to indicate this. Data should then be recorded against this conditional self-reported weight item. DSS specific information: Weight rounded to the nearest whole kilogram is acceptable. Weight should be recorded in the first trimester, preferably as a measured weight. However, the woman's self-reported weight around the time of conception is acceptable if a measured weight is not available. Perinatal NBEDS 2016-17 Health!, Superseded 05/10/2016 Implementation start date: 01/07/2016 Implementation end date: 30/06/2017 Conditional obligation: It is preferable to collect and record a pregnant woman's weight as a measured weight. Where a measured weight has not been provided or it is not possible to ascertain whether the weight has been measured or self-reported, the value 999.9 should be recorded against the measured weight data item to indicate this. Data should then be recorded against this conditional self-reported weight item. DSS specific information: Weight rounded to the nearest whole kilogram is acceptable. Weight should be recorded in the first trimester, preferably as a measured weight. However, the woman's self-reported weight around the time of conception is acceptable if a measured weight is not available. Perinatal NBEDS 2017-18 Health!, Superseded 02/08/2017 Implementation start date: 01/07/2017 Implementation end date: 30/06/2018 Conditional obligation: It is preferable to collect and record a pregnant woman's weight as a measured weight. Where a measured weight has not been provided or it is not possible to ascertain whether the weight has been measured or self-reported, the value 999.9 should be recorded against the measured weight data item to indicate this. Data should then be recorded against this conditional self-reported weight item. DSS specific information: Weight rounded to the nearest whole kilogram is acceptable. Weight should be recorded in the first trimester, preferably as a measured weight. However, the woman's self-reported weight around the time of conception is acceptable if a measured weight is not available. Perinatal NBEDS 2018-19 Health!, Superseded 12/12/2018 Implementation start date: 01/07/2018 Implementation end date: 30/06/2019 Conditional obligation: It is preferable to collect and record a pregnant woman's weight as a measured weight. Where a measured weight has not been provided or it is not possible to ascertain whether the weight has been measured or self-reported, the value 999.9 should be recorded against the measured weight data item to indicate this. Data should then be recorded against this conditional self-reported weight item. DSS specific information: Weight rounded to the nearest whole kilogram is acceptable. Weight should be recorded in the first trimester, preferably as a measured weight. However, the woman's self-reported weight around the time of conception is acceptable if a measured weight is not available. Perinatal NBEDS 2019–20 Health!, Superseded 20/11/2019 Implementation start date: 01/07/2019 Implementation end date: 30/06/2020 Conditional obligation: It is preferable to collect and record a pregnant female's weight as a measured weight. Where a measured weight has not been provided or it is not possible to ascertain whether the weight has been measured or self-reported, the value 999.9 should be recorded against the Person—weight (measured), total kilograms N[NN].N data element. Data should then be recorded against this conditional self-reported weight data element. DSS specific information: Weight rounded to the nearest whole kilogram is acceptable. Weight should be recorded in the first trimester, preferably as a measured weight. However, the female's self-reported weight around the time of conception is acceptable if a measured weight is not available. Perinatal NBEDS 2020–21 Health!, Superseded 03/12/2020 Implementation start date: 01/07/2020 Implementation end date: 30/06/2021 Conditional obligation: It is preferable to collect and record a pregnant female's weight as a measured weight. Where a measured weight has not been provided or it is not possible to ascertain whether the weight has been measured or self-reported, the value 999.9 should be recorded against the Person—weight (measured), total kilograms N[NN].N data element. Data should then be recorded against this conditional self-reported weight data element. DSS specific information: Weight rounded to the nearest whole kilogram is acceptable. Weight should be recorded in the first trimester, preferably as a measured weight. However, the female's self-reported weight around the time of conception is acceptable if a measured weight is not available. Perinatal NBEDS 2021–22 Health!, Superseded 17/12/2021 Implementation start date: 01/07/2021 Implementation end date: 30/06/2022 Conditional obligation: It is preferable to collect and record a pregnant female's weight as a measured weight. Where a measured weight has not been provided or it is not possible to ascertain whether the weight has been measured or self-reported, the value 999.9 should be recorded against the Person—weight (measured), total kilograms N[NN].N data element. Data should then be recorded against this conditional self-reported weight data element. DSS specific information: This data element is recorded for the mother only. Weight should be recorded in the first trimester, preferably as a measured weight. However, the female's self-reported weight around the time of conception is acceptable if a measured weight is not available. Weight rounded to the nearest whole kilogram is acceptable. Perinatal NBEDS 2022–23 Health!, Standard 17/12/2021 Implementation start date: 01/07/2022 Implementation end date: 30/06/2023 Conditional obligation: It is preferable to collect and record a pregnant female's weight as a measured weight. Where a measured weight has not been provided or it is not possible to ascertain whether the weight has been measured or self-reported, the value 999.9 should be recorded against the Person—weight (measured), total kilograms N[NN].N data element. Data should then be recorded against this conditional self-reported weight data element. DSS specific information: This data element is recorded for the mother only. Weight should be recorded in the first trimester, preferably as a measured weight. However, the female's self-reported weight around the time of conception is acceptable if a measured weight is not available. Weight rounded to the nearest whole kilogram is acceptable. Tasmanian Perinatal Data Set - 2016 Tasmanian Health, Standard 30/01/2017 Implementation start date: 01/07/2016 Implementation end date: 30/06/2017 Tasmanian Perinatal Data Set - 2019 Tasmanian Health, Superseded 23/06/2020 Implementation start date: 01/07/2019 Implementation end date: 30/06/2020 |