Objective:

To describe the methodological design of the National Health and Nutrition Survey in localities with less than 100 000 inhabitants (Ensanut 100k).

Materials and methods:

The Ensanut 100k is a probabilistic survey that over-represents households with less economic capabilities. This paper describes the scope of the survey, sampling procedures, measurement and inference and logistics organization.

Results:

10 461 home interviews and 26 161 individual interviews were obtained. The household response rate was 89 and 92% from individuals.

Conclusions:

The probabilistic design of the Ensanut 100k allows to make valid statistical inferences about parameters of interest for public health in localities with less than 100 000 inhabitants, localities where 52% of the population lives according to the 2010 census. The comparability of the results with the Ensanut 2012 facilitates the assessment of the government’s support actions to populations with lower economic capacities in the period 2012-2018.

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