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Study of Chronic Diseases (Edoc): methodological aspects.

Thatiana Lameira Maciel Amaral1, Cledir de Araújo Amaral2, Margareth Crisóstomo Portela3

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The Study of Chronic Diseases (Edoc) in Rio Branco, Acre, employed a complex two-stage cluster sampling design to survey 1,701 adults and older adults. This epidemiological study provides crucial data for public health policy decisions.

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Area of Science:

  • Public Health
  • Epidemiology
  • Survey Methodology

Background:

  • Chronic diseases pose a significant public health challenge globally and in Brazil.
  • Understanding the epidemiological profile of specific populations is crucial for targeted interventions.
  • Rio Branco, Acre, lacked comprehensive data on chronic disease risk factors and prevalence.

Purpose of the Study:

  • To describe the sampling design and methodological aspects of the Study of Chronic Diseases (Edoc).
  • To provide a robust methodology for assessing the health status of adults and older adults in Rio Branco, Acre.
  • To establish a foundation for future epidemiological analyses and public health policy development.

Main Methods:

  • A two-stage cluster sampling design was used, selecting census enumeration areas (CEAs) and then households.
  • Two distinct surveys were conducted: Edoc-A (18-59 years) and Edoc-I (≥60 years).
  • Participants underwent interviews, anthropometric measurements, vital sign assessments, and biological sample collection (blood and urine).

Main Results:

  • The study included 1,701 participants (685 Edoc-A, 1,016 Edoc-I).
  • Sampling weights were calibrated to ensure unbiased population estimates.
  • Subsamples were generated for theme-specific analyses, including those exclusive to Edoc-I.

Conclusions:

  • The Edoc study successfully implemented a complex sampling design for epidemiological research.
  • The collected data offers valuable insights into the health profile of the population in Rio Branco, Acre.
  • Findings contribute to public health knowledge and inform policy decisions for disease prevention and management.