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Related Experiment Videos

Managing data for a multicountry longitudinal study: experience from the WHO Multicentre Growth Reference Study.

Adelheid W Onyango1, Alain J Pinol, Mercedes de Onis

  • 1Department of Nutrition, World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland.

Food and Nutrition Bulletin
|April 9, 2004
PubMed
Summary

The World Health Organization (WHO) Multicentre Growth Reference (MGRS) protocol ensured high-quality data collection across multiple sites. Rigorous data management and validation procedures were key to its success.

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Area of Science:

  • Public Health
  • Biostatistics
  • Data Management

Background:

  • The World Health Organization (WHO) Multicentre Growth Reference (MGRS) required a robust data management system.
  • Standardized data collection across multiple international sites presented significant challenges.

Purpose of the Study:

  • To detail the data management protocol for the WHO MGRS.
  • To ensure the collection and maintenance of a high-quality, large-scale data bank.

Main Methods:

  • Centralized preparation of data collection and processing instruments for standardized use.
  • Implementation of internal data validation features for early error detection.
  • Establishment of standard operating procedures for master file updating and auditing.

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Main Results:

  • Each site managed data collection, entry, verification, and validation.
  • Monthly data submission to a central coordinating center for consolidation and quality control.
  • Error identification at the central level led to source correction, ensuring data integrity.

Conclusions:

  • The MGRS protocol successfully facilitated the accumulation of a large, high-quality dataset.
  • Transparency and standardized procedures were crucial for data accuracy and reliability.
  • The protocol ensured data quality through rigorous validation and a clear audit trail.