National Nutrition and Health Survey 2015

It is a second survey conducted in the 36 states of the country aimed at assessing the nutritional and health status of children under 5 years of age and of women in the reproductive age group (15-49 years) at a national level. Additional key indicators assessed include IpTp coverage, ANC attendance and HIV testing among pregnant women

The specific objectives of the survey were to:

– Assess knowledge and beliefs of high-risk groups about STI and HIV & AIDS
– Determine their current risk behaviours
– Assess key target population-level trends in risk behaviours over time
– Determine the prevalence of HIV infection among the high risk groups
– Provide information to guide future programme planning
– Provide appropriate, sustainable non-stigmatising opportunities for key populations to access HIV prevention services, including referrals for HIV positive persons.

The overall HIV prevalence among the target groups was 9.5% and this was highest among MSM (22.9%), followed by BBFWSS (19.4%), NBBFWSS (8.6%), PWID (3.4%), Police (2.5%),Transport workers (1.6%) and Armed Forces (1.5%). There was a general decline in prevalence across the studied groups, between 2010 and 2014, with the NBBFWSS showing the highest drop (21.1 – 8.6 per cent). The Police, Armed Forces and Transport Workers maintained prevalence rates below the national, as was observed in 2010. However, the MSM showed remarkable increase from 17.2 to 22.9 %.

Name of data collection activity

National Nutrition and Health Survey 2015

Year(s) of Implementation




Frequency of implementation


Geographical Coverage

National Level

States Implemented

Abia, Anambra, Benue , Cross River, Enugu, Edo ,Kaduna, Kano, Lagos, Nasarawa, Oyo, Rivers, Taraba, FCT

Program Area


Target group/Population of Interest

Women aged 15 to 49 years, Children aged less than 5 years old

Population unit

  • Household

Type of data collection activity


Sample size

25,210 household, 43748 women and children; 23, 688 women, 20, 060 children

Sampling procedure

The sample for the 2015 NNHS is nationally representative and covers the entire population residing in non-institutional dwelling units in the country. The survey uses the national sample frame, which is a list of Enumeration Areas (EAs) prepared for the 2006 Population Census. Administratively Nigeria is divided into states, Local Government Areas (LGAs), and localities. In addition to these administrative units, during the 2006 population census, each locality was subdivided into census Enumeration Areas (EAs). The primary sampling unit (PSU), referred to as a cluster in this survey, is defined on the basis of EAs from the 2006 EA census frame.
The 2015 NNHS sample has been selected using a two-stage cluster design as described below.
First stage sampling procedure: cluster selection
The PSU (clusters) for each state were randomly selected from the national master sample frame according to the probability proportional to size (PPS) method with the support from National
Population Commission.

Second stage sampling procedure: household selection
The second stage of sampling consisted of selecting households within each cluster by using systematic random selection. The team leader was responsible for the determination of the total number of households in the cluster by conducting a household listing through detailed enumeration of the selected cluster with a support from the community leader. This served as the sampling frame for the selection of households. The team leader then entered the total number of households onto the tablet and sampling interval was automatically calculated and displayed on the tablet. The sampling interval is calculated by dividing the total number of households in the cluster by the number of households to be interviewed. A random number table was used to randomly select a start number, between 1 and the sampling interval, to identify the first household. The sampling interval was used to identify all subsequent households to be included in the survey.

Data collection period

January 2015 – December 2015

Data collection tool

Paper questionnaire

Implementing organization

  • National Bureau of Statistics

Collaborating organization

  • United Nations Children’s Emergency Fund

Funding agency

  • Federal Government of Nigeria
  • United Nations Children’s Emergency Fund
  • United States Agency for International Development
  • Department For International Development

Name of contact person

Dosunmu Omo Oba

Email Address of Contact Person/Organisation

Webpage of data project/activity