Brazilian National Dietary Survey 2008-2009
Brazil, 2008 - 2009
Get MicrodataIdentification
BRA_2008_2009_INA_v01_M_v01_A_ESS
Brazilian National Dietary Survey 2008-2009
Inquérito Nacional de Alimentação 2008-2009
| Name | Country code |
|---|---|
| Brazil | BRA |
Individual Food Consumption/Dietary Survey [hh/ifcs]
In 2008-2009, the Brazilian Institute of Geography and Statistics (IBGE, Instituto Brasileiro de Geografia e Estatística) included for the first time in its national Consumer Expenditure Survey (POF, Pesquisa de Orçamentos Familiares) a module to assess individual food intake in a sub-sample of the studied households.
Sample survey data [ssd]
Individuals
Scope
The survey collected information on:
- SUBJECTS: information on the participants, such as age, sex, and geographical location
- CONSUMPTION: information on all foods consumed by each participant in each survey day, including quantities and nutrient values
The population group covered in the survey was the general population aged 10 years and older.
Coverage
National coverage, both urban and rural areas.
Producers and sponsors
| Name |
|---|
| Brazilian Institute of Geography and Statistics (IBGE, Instituto Brasileiro de Geografia e Estatística) |
Sampling
Data were collected in a nationally representative cross-sectional survey (the 2008–2009 Brazilian POF), which investigated a sample of 55 970 households that had been selected using a two-stage cluster sample design. In the first stage, census tracts, which were the primary sampling units, were randomly selected based on data from the 2000 Brazilian Demographic Census to obtain homogeneous socio-economic and geographic strata. In the second stage, households were selected within each tract by simple random sampling without replacement. The National Dietary Survey was conducted in about 24 percent of these households (n = 13 569) to obtain food consumption data for all family members, individuals aged 10 years and older.
Each household in the POF sub-sample represents a certain number of permanent private households from the population (universe) from which the original sample was selected. As such, each household in the sub-sample is associated with a sample weight or expansion factor. When applied to the characteristics investigated by the POF, this factor allows for the estimation of quantities of interest for the entire survey population.
The expansion factors were initially calculated based on the sampling plan effectively used in the selection of the sub-sample, incorporating adjustments to compensate for non-response from the investigated units. Subsequently, these factors underwent calibration adjustments, a procedure that aimed to ensure that, for each Federation Unit (calibration domains), the estimated totals for the population in certain segments matched the respective totals obtained through the expansion of the original POF sample.
Three variables represent the expansion sample weights in the survey: ESTRATO_POF, COD_UPA, and WEIGHTING_FACTOR.
WEIGHTING_FACTOR: Final sampling weights (original survey variable "PESO_FINAL").
ESTRATO_POF: Stratification variable of the survey sampling design. This variable identifies the sampling strata used in the complex survey design.
COD_UPA: Primary Sampling Unit (PSU) identifier of the survey sampling design. This variable identifies the selected clusters (UPAs) and should be used in the analyses that account for the complex survey design.
WEIGHTING_FACTOR can be used alone to obtain weighted point estimates, but ESTRATO_POF and COD_UPA should also be used in analysis that account for the complex survey design, to allow for an accurate estimation of standard errors, confidence intervals, and statistical tests
Data collection
| Start | End |
|---|---|
| 2008-11-11 | 2009-05-18 |
- Face-to-face [f2f]
| Affiliation |
|---|
| Brazilian Institute of Geography and Statistics (Instituto Brasileiro de Geografia e Estatística - IBGE) |
Individuals aged 10 years or older, residing in households that were selected for the survey, completed food diaries recording all foods and beverages consumed on two non-consecutive days. Participants were asked to include information on time, amount, and place of intake (inside or outside home). Details on the preparation mode were required for specific foods, mainly meats and vegetables. All respondents received a booklet with explanations on how to fill out the records and with pictures of tableware to help them estimate the amount of food consumed. Interviewers reviewed the records and entered the data into a computer database at the household. In addition, interviewers probed respondents with questions over usually forgotten items, such as small snacks, sweets and beverages. Further, they verified that all three hours periods without food intake and records with less than five items were corrected, following the multiple-pass method to accurately record all possible foods consumed. This procedure allowed the filling-in of incomplete data by interviewing family members.
Data Access
| Is signing of a confidentiality declaration required? | Confidentiality declaration text |
|---|---|
| yes | The users shall not take any action with the purpose of identifying any individual entity (i.e. person, household, enterprise, etc.) in the micro dataset(s). If such a disclosure is made inadvertently, no use will be made of the information, and it will be reported immediately to FAO. |
Micro datasets disseminated by FAO shall only be allowed for research and statistical purposes. Any user which requests access working for a commercial company will not be granted access to any micro dataset regardless of their specified purpose. Users requesting access to any datasets must agree to the following minimal conditions:
- The micro dataset will only be used for statistical and/or research purposes;
- Any results derived from the micro dataset will be used solely for reporting aggregated information, and not for any specific individual entities or data subjects;
- The users shall not take any action with the purpose of identifying any individual entity (i.e. person, household, enterprise, etc.) in the micro dataset(s). If such a disclosure is made inadvertently, no use will be made of the information, and it will be reported immediately to FAO;
- The micro dataset cannot be re-disseminated by users or shared with anyone other than the individuals that are granted access to the micro dataset by FAO.
Pesquisa de Orçamentos Familiares 2008-2009 - Dados de Consumo Alimentar Pessoal no Brasil
Disclaimer and copyrights
The user of the data acknowledges that the original collector of the data, the authorized distributor of the data, and the relevant funding agency bear no responsibility for use of the data or for interpretations or inferences based upon such uses.
Contacts
| Name | Affiliation | |
|---|---|---|
| Food and Nutrition Division | Food and Agriculture Organization of the United Nations | [email protected] |
Metadata production
DDI_BRA_2008_2009_INA_v01_M_v01_A_ESS_FAO
| Name | Abbreviation | Affiliation | Role |
|---|---|---|---|
| Food and Nutrition Division | ESN | Food and Agriculture Organization of the United Nations | Metadata producer |
| Statistics Division | ESS | Food and Agriculture Organization of the United Nations | Metadata adapted for FAM |