Module 15. Data processing and analysis
Data processing
Analyses for surveys designed with stratification and clustering
Additional information for interpreting nutrition indicators
Standard analysis and checks for anthropometry data
Introduction
Because this micronutrient survey manual focuses on the standard micronutrient survey design (a multi-stage cluster survey with or without stratification), this module focuses on processing and analysing data from surveys with this design. In specific situations, such as a survey in a refugee camp, where the simple random sampling (SRS) method is selected, analysis should be conducted using SRS-specific procedures. This usually means that there is no need to apply survey weights or a stratum or cluster variable when running frequency tables and generating mean estimates.
Analyses of micronutrient survey data should be conducted using software that accounts for multi-stage complex survey design with stratification. Such software includes Epi Info , SAS version 8.0 or later, SPSS with the optional SPSS Complex Samples module, Stata, Sudaan, and R.
Anthropometric indices and exclusion flags
Document explaining how to calculate anthropometric indices and which exclusion flags to use
DownloadGraph to plot anthropometric indices against reference population
Graph template that can be used to plot anthropometric indices against a reference population
DownloadInstructions: Anthropometry variable cleaning and creation
This document describes how to clean and prepare anthropometry data for analysis.
DownloadA Practical Guide to Adjust Micronutrient Biomarkers for Inflammation Using the BRINDA Method
The Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) inflammation adjustment method uses regression correction to adjust for the confounding effects of inflammation on select micronutrient biomarkers. This paper serves as a practical guidebook for the BRINDA inflammation adjustment approach and aids users to use the BRINDA R package and SAS to streamline their analyses.
DownloadComparison of laboratory instrument types for analysis of plasma or serum zinc concentration
IZiNCG TECHNICAL BRIEF No. 12 2020
DownloadExample data dictionary
Example data dictionary that can be used as a reference when building a survey specific dictionary
DownloadMethods and analyzers for hemoglobin measurement
Journal article: Methods and analyzers for hemoglobin measurement in clinical laboratories and field settings. Whitehead RD et al. Ann. N.Y. Acad. Sci. ISSN 0077-8923.
DownloadR code - BRINDA: Computation of BRINDA Adjusted Micronutrient Biomarkers for Inflammation
The BRINDA R package is a user-friendly all-in-one R package that uses a series of functions to implement BRINDA adjustment method.
Details and R package are located here: https://cran.r-project.org/web/packages/BRINDA/index.html
Download