Food Insecurity Experience Scale 2019 - Botswana

Abstract
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Sustainable Development Goal (SDG) target 2.1 commits countries to end hunger, ensure access by all people to safe, nutritious and sufficient food all year around. Indicator 2.1.2, “Prevalence of moderate or severe food insecurity based on the Food Insecurity Experience Scale (FIES)”, provides internationally-comparable estimates of the proportion of the population facing difficulties in accessing food. More detailed background information is available at http://www.fao.org/in-action/voices-of-the-hungry/fies/en/ .

The FIES-based indicators are compiled using the FIES survey module, containing 8 questions. Two indicators can be computed:
1. The proportion of the population experiencing moderate or severe food insecurity (SDG indicator 2.1.2),
2. The proportion of the population experiencing severe food insecurity.

These data were collected by FAO through the Gallup World Poll. General information on the methodology can be found here: https://www.gallup.com/178667/gallup-world-poll-work.aspx. National institutions can also collect FIES data by including the FIES survey module in nationally representative surveys.

Microdata can be used to calculate the indicator 2.1.2 at national level. Instructions for computing this indicator are described in the methodological document available under the "DOCUMENTATION" tab above. Disaggregating results at sub-national level is not encouraged because estimates will suffer from substantial sampling and measurement error.

Geographic coverage
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National coverage

Analysis unit
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Individuals

Universe
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Individuals of 15 years or older.

Kind of data
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Sample survey data [ssd]

Sampling procedure
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The sample was drawn proportional to the population and the country was stratified by region and by population size strata.
Exclusions: None
Design effect: 1.65

Mode of data collection
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Face-to-face [f2f]

Cleaning operations
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Statistical validation assesses the quality of the FIES data collected by testing their consistency with the assumptions of the Rasch model. This analysis involves the interpretation of several statistics that reveal 1) items that do not perform well in a given context, 2) cases with highly erratic response patterns, 3) pairs of items that may be redundant, and 4) the proportion of total variance in the population that is accounted for by the measurement model.

Sampling error estimates
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The margin of error is estimated as 3.8 .This is calculated around a proportion at the 95% confidence level. The maximum margin of error was calculated assuming a reported percentage of 50% and takes into account the design effect.

摘要
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可持续发展目标（SDG）2.1 承诺各国致力于终结饥饿，确保全年所有人都能获得安全、营养充足的食物。指标 2.1.2，即基于粮食不安全经验量表（FIES）的粮食不安全普遍率，提供了国际上可比较的估计，即面临获取食物困难的人口比例。更详细的背景信息可在 http://www.fao.org/in-action/voices-of-the-hungry/fies/en/ 查询。

基于 FIES 的指标是通过包含 8 个问题的 FIES 调查模块编制的。可以计算两个指标：
1. 经历中等到严重粮食不安全的人口比例（SDG 指标 2.1.2），
2. 经历严重粮食不安全的人口比例。

这些数据由联合国粮农组织（FAO）通过盖洛普世界民意调查收集。关于方法论的一般信息可在 https://www.gallup.com/178667/gallup-world-poll-work.aspx 查找。国家机构也可以通过在国家代表性调查中包含 FIES 调查模块来收集 FIES 数据。

微观数据可用于计算国家级的指标 2.1.2。计算此指标的方法描述在上方的“文档”选项卡下的方法论文件中。不建议在次国家层面上分解结果，因为估计将受到大量抽样和测量误差的影响。

地理覆盖范围
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国家覆盖

分析单位
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个人

总体
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15 岁及以上个人。

数据类型
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样本调查数据 [ssd]

抽样程序
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样本按人口比例抽取，且国家按地区和人口规模层进行分层。排除：无
设计效应：1.65

数据收集方式
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面对面 [f2f]

数据清洗操作
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统计验证通过测试 FIES 数据与 Rasch 模型假设的一致性来评估其质量。该分析涉及对多个统计量的解释，这些统计量揭示了以下内容：1）在特定背景下表现不佳的项目，2）具有高度波动性响应模式的案例，3）可能重复的项目对，以及 4）由测量模型解释的总体方差中的比例。

抽样误差估计
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误差范围估计为 3.8。这是在 95% 的置信水平下围绕比例计算的。最大误差范围是在假设报告百分比为 50% 并考虑设计效应的情况下计算的。