Module 2. Indicators of programme coverage, specimen selection, management and analysis
The overall objectives of the micronutrient survey describe the populations to be included, as well as the micronutrients and programme process indicators to be assessed (see Module 1, Planning and designing a micronutrient survey). The subsequent steps determine the type of samples and specimens required, and how they will be collected, transported, stored and analysed. Development of recommendations concerning most biomarkers 1 and food nutrients requires analysis in a laboratory setting with specialized equipment and training. These are described in more detail in Module 3: Biomarker selection and specimen handling.
Decisions made during the planning process will influence the survey outcome, protocol development, draft budget, and equipment and supplies needed. Some points to consider:
- program coverage indicators will require knowledge of national and large-scale nutrition interventions, and may reflect a national nutrition policy;
- the selection of indicators will be based on the feasibility of collecting required food samples and biological specimens, maintaining a cold chain if required, access to appropriate laboratory capacity either in the country or internationally, and available budget; and
- the survey scope may need to be adjusted, depending on the cost of collecting, transporting, and analysing the samples and specimens required to assess the chosen indicator(s).
Module 3: Biomarker selection and specimen handling describes the options and main factors to consider in making these decisions.
Ordering equipment and supplies is an important determinant of the survey timeline, as described further in Module 9, Survey equipment and supplies and should be done well in advance of the survey. At the same time, if this is done too early there is a risk of exceeding expiration dates on the supplies purchased (for example, cuvettes for a portable photometer).
In this context, a biomarker is a measurable indicator of micronutrient or related health status. ↩
Detailed spreadsheet enables the user to calculate a rough cost of the supplies and tests needed for a surveyDownload
Document provides useful information for laboratories in low-resource settings about the minimum components of quality assuranceDownload
Presentation providing instructions on the collection, testing, and processing of specimens in the fieldDownload
Document instructs on how to package and ship specimens using dry iceDownload