COVID-19 High Frequency Phone Surveys 2021 - LAC HFPS Harmonized Dataset - Brazil

Abstract
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To facilitate comparisons with the Latin America and the Caribbean (LAC) High-Frequency Surveys collected in 2021, harmonized versions of the COVID-19 High Frequency Phone Surveys 2022 Brazil databases have been produced. The databases follow the same structure as those for the countries in the region (for example, see: COVID-19 LAC High Frequency Phone Surveys 2021 (Wave 1)).

The Brazil 2021 COVID-19 Phone Survey was conducted to provide information on how the pandemic had been affecting Brazilian households in 2021, collecting information along multiple dimensions relevant to the welfare of the population (e.g. changes in employment and income, coping mechanisms, access to health and education services, gender inequalities, and food insecurity). A total of 2,166 phone interviews were conducted across all Brazilian states between July 26 and October 1, 2021. The survey followed an Random Digit Dialing (RDD) sampling methodology using a dual sampling frame of cellphone and landline numbers. The sampling frame was stratified by type of phone and state. Results are nationally representative for households with a landline or at least one cell phone and of individuals of ages 18 years and above who have an active cell phone number or a landline at home.

Geographic coverage
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National level.

Analysis unit
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Households and individuals of 18 years of age and older.

Sampling procedure
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The sample is based on a dual frame of cell phone and landline numbers that was generated through a Random Digit Dialing (RDD) process and consisted of all possible phone numbers under the national phone numbering plan. Numbers were screened through an automated process to identify active numbers and cross-checked with business registries to identify business numbers not eligible for the survey. This method ensures coverage of all landline and cellphone numbers active at the time of the survey. The sampling frame was stratified by type of phone and state. See Sampling Design and Weighting document for more detail.

Mode of data collection
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Computer Assisted Telephone Interview [cati]

Research instrument
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Available in Portuguese. The questionnaire followed closely the LAC HFPS Questionnaire of Phase II Wave I but had some critical variations.

摘要
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为便于与2021年收集的拉丁美洲及加勒比海地区（LAC）高频调查进行比较，已制作了2022年巴西COVID-19高频电话调查的协调版本。这些数据库的结构与该地区各国数据库的结构一致（例如，参见：2021年COVID-19 LAC高频电话调查（第1次波次））。2021年巴西COVID-19电话调查旨在提供有关疫情在2021年如何影响巴西家庭的信息，收集与人口福利相关的多个维度的信息（例如，就业和收入的变化、应对机制、获得医疗和教育服务、性别不平等以及粮食不安全）。2021年7月26日至10月1日期间，在巴西所有州共进行了2,166次电话访谈。调查采用随机数字拨号（RDD）抽样方法，使用手机和固定电话号码的双抽样框架。抽样框架按电话类型和州进行分层。结果代表拥有固定电话或至少一部手机的家庭，以及18岁及以上拥有活跃手机号码或家中设有固定电话的个体。
地理覆盖范围
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全国级别。
分析单元
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家庭以及18岁及以上的个人。
抽样程序
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样本基于通过随机数字拨号（RDD）过程生成的手机和固定电话号码的双框架，包括国家电话号码计划下的所有可能的电话号码。通过自动化流程筛选号码以识别活跃号码，并通过与商业登记册核对以识别不符合调查资格的商业号码。此方法确保覆盖了调查期间所有活跃的固定电话和手机号码。抽样框架按电话类型和州进行分层。有关更多详细信息，请参阅抽样设计和加权文档。
数据收集方式
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计算机辅助电话访谈 [cati]
研究工具
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问卷可用葡萄牙语。问卷紧密遵循LAC HFPS第II阶段第I波次的问卷，但存在一些关键性差异。