IDPs (ACF) - PFEDA / Page d'accueil PFEDA

METHODOLOGY
The target population for the survey was children aged between 6 and 59 months. This
age group is considered to be particularly vulnerable to malnutrition.
1. Survey Design
Classic two-stage cluster sampling was used for the survey. A total of 30 clusters of 30
children aged 6 to 59 months old were selected in order to provide an estimate of the
prevalence of malnutrition with a minimum 5% confidence.
2. Sampling methodology
Initially a sampling framework was constructed from which a representative sample
could be drawn from. Population figures were collected from a variety of sources (ACF
Water and Sanitation Team, ACF Health Education Team Statistics and IDP camp
Elders). Only camps that were accessible to ACF were included in the sampling
framework. Annexes 3 and 4 details those camps the camps and their populations that
were included in the survey as well as those that could not be included.
The percentage of children less than 5 years was then estimated at 20% and the
cumulative target population determined. For each section of the town the estimated
population, and the estimated number of children under 5 was then listed. The cumulative
population of children under 5 years old was then calculated by adding at each stage of
the list the number of children under 5 years to the total of the number of children under 5
years in the previous section(s) of the town.
Thirty clusters were randomly selected. The cluster interval was calculated by dividing
the total cumulative population under five years old by the number of clusters: (22962 /
30 = 765). A random number was then chosen between one and the cluster interval using
a random number table to have a starting number (51) for the first cluster. The following
29 clusters were selected systematically by adding the cluster interval number to the
previous cluster. Details can be found in Annex 5.
Once this list had been completed, the ACF Health Education team visited each chosen
cluster prior to the day of the survey to inform the people about the survey, the purpose of
the survey, and to ask that the population of the cluster stay at home on the day of the
survey.
The second stage of sampling was carried out in the cluster. In general, one member of
the team went to the centre of the chosen area with the chief of the community and threw
a pencil to determine a direction and all the households following this direction were
visited and all the children found in the houses between 6 and 59 months, and between 65
and 110 cm, were screened. However, due to the nature of the IDP camps in Mogadishu
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