Nigeria - Post Measles Campaign Coverage Survey 2018, First round
Reference ID | NGA-NBS-PMCCS-2018-v01 |
Year | 2018 - 2019 |
Country | Nigeria |
Producer(s) | National Bureau of Statistics - Federal Government of Nigeria (FGN) |
Sponsor(s) | Bill and Melinda Gates Foundation - BMGF - Funding partner The Vaccine Alliance - GAVI - Funding partner Federal Government of Nigeria - FGN - Funding partner |
Metadata | Documentation in PDF Download DDI Download RDF |
Study website |
Created on | Aug 22, 2019 |
Last modified | Aug 22, 2019 |
Page views | 42297 |
Downloads | 5669 |
Sampling
Sampling Procedure
PMCCS was based on the National Population Commission (NPopC) master sampling frame based on the 2006 Nigeria Housing and Population Census. The sampling frame developed under the National Integrated Survey of Households (NISH2). Areas of the country that are inaccessible due to security reasons were excluded from the sampling frame including specific Local Government Areas (LGAs) in Borno and Adamawa states. Interpretation of results from these areas should therefore be conducted in light of these exclusions.
A stratified two stage - cluster sampling design was chosen for the 2017/18 PMCCS. Reporting strata were 36 state and FCT- Abuja.
The first stage selection involved the selection of EAs in each state and the FCT (Abuja) from the master sampling frame. A total of 30 EAs were selected from the sampling frame and with the selection probability of each EA was recorded for incorporation into household weights.
Following first stage sampling, household listing was conducted in the selected EAs to map all structures and boundaries and also identify households with children aged between 9 and 59 months eligible for second stage selection. Household listing was conducted between the 2nd and 9th of December 2017.
Second stage selection of households to be interviewed was conducted by the National Bureau of Statistics (NBS) using simple random sampling without replacement from the list of households with eligible children aged 9 to 59 months. Seven (7) households with eligible children were randomly selected from each of the 30 enumeration areas in every state.
Deviations from Sample Design
No Deviation
Response Rate
Nationally, the household response rate was 96.2 percent. The household response rate was generally higher in rural areas compared to urban areas with the response rate being 97.4 percent and 92.6 percent respectively. Notably, the household response rates in Lagos, Ebonyi, Oyo, Abuja and Abia were below 90 percent. Despite a planned sample size of 7 eligible households per EA, this planned sample was only achieved in 8 states. In a majority of the states, there were less than 7 households with eligible children available for selection to the survey and were all selected in the EA.
Weighting
Design weights were computed as the product of inverse probabilities of selection in the first and second stage. Next, the design weight was adjusted for household non-response and child non-response to get the sampling weights for households and for children, respectively. Non-response was adjusted at the sampling stratum level. After adjusting for non-response, the sampling weights were normalized and post stratified to get the final standard weights that appear in the data files. Post-stratification was conducted by multiplying the normalised weights with the estimated proportion of children aged 9 to 59 months in each stratum. The estimated number of children in each stratum was obtained from recently concluded microplanning activity.
Bivariate analysis of post measles campaign vaccination coverage, reasons for non-vaccination, AEFI and routine immunisation measles vaccination coverage were presented by residence, gender and zones. Wilson's 95% confidence intervals and upper and lower confidence bounds have been computed throughout the report.