Nigeria - Post Yellow Fever Campaign Coverage Survey 2019, First round

The sample design for any household-based survey requires availability of a good sampling frame. The frame of enumeration areas (EAs) developed by the National Population Commission (NPopC) for the purpose of the Housing and Population Census conducted in 2006 was the sampling frame to be used. For this survey.
The sampling frame was developed under the second National Integrated Survey of Households (NISH2) master frame programme. There were no inaccessible LGAs in any of the sampled states due to security or any external factors, except hard to reach areas. Also, there was no exclusion to Interpretation of results from any area.
From the list of 662,529 EAs for the country, NBS drew a Master Sample of 30 Enumeration Areas with equal probability from each LGA in the 36 states and 40 EAs in each of the 6 LGAs in the FCT, Abuja. This brings the total number of master sample EAs selected by NBS for its household-based surveys to 23,280. The National Integrated Survey of Households (NISH) is a two-stage replicated and rotatable cluster sample design. The State-base NISH Master Sample Frame is constructed by pooling together LGA master samples of 30 EAs for all the LGAs in the state and selecting sample of 200 EAs using a systematic selection procedure. These 200 EAs that form the NISH master sample were selected into 20 replicates, with each replicate containing 10 sample EAs.
The stages of selection are stated below:

1.The first stage selection is the selection of EAs in each of the five (5) strata namely Kebbi, Sokoto, Niger, Plateau and the Federal Capital Territory (FCT), Abuja. Forty (40) enumeration areas (4 replicates) were selected for coverage in each of the strata. A total of 200 EAs were selected in all the five strata.
2.The second stage involved the selection of households within each cluster by using systematic random sampling. A sample of seven (7) households was randomly selected per EA for the interview providing a total of 1,400 households in the five (5) states.
3.The third stage selection involved all household members who were aged between 9 months and 44 years were eligible for inclusion into the survey. This eligible age range was divided into three non-overlapping age cohorts of 9 - 23 months, 24 - 59 months, and 6 - 44 years and one eligible person was randomly selected for interview from each of these age cohorts in a household. When there was only one eligible person in an age group, that person automatically qualified to be interviewed and was selected for interviewing. Using this three-stage sampling design, a maximum of three persons were interviewed in the selected households regardless of the number of persons aged between 9 months and 44 years there were in a household. Household members outside the age range of 9 months and 44 years were not included in the survey.
The use of Kish grid at the household for selection of individuals to be interviewed was programmed into the Computer Assisted Personal Interviewing (CAPI) that were used for data collection. Individuals to be interviewed were selected automatically on completion of the household roster.


No deviation


The response rate was very high with 98.9 percent


Population weight was calculated for the household. This weight variable (wt) has been included in the dataset: When applied, this weight will raised the sample households and individuals to national values.