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Table 1 Characteristics of the Nigeria Demographic and Health Surveys

From: Have policy responses in Nigeria resulted in improvements in infant and young child feeding practices in Nigeria?

Title of Survey

Conducted by

Coverage

Sampling frame & population size

Sampling method

Sample size (n)

Nigeria Demographic and Health Survey 1999

National Population Commission Abuja, Nigeria and ORC Macro Calverton, Marylands, USA

National (36 states and a federal capital territory)

1999 census with a population of 88,992,220

Two-stage stratified cluster design

8,199

Nigeria Demographic and Health Survey 2003

National Population Commission Abuja, Nigeria and ORC Macro Calverton, Marylands, USA

National (36 states and a federal capital territory)

1991 census with a population of 88,992,220

Two-stage stratified cluster design

7,620

Nigeria Demographic and Health Survey 2008

National Population Commission Abuja, Nigeria and ORC Macro Calverton, Marylands, USA

National (36 states and a federal capital territory)

2006 census with a population of 140,431,790

Two-stage stratified cluster design

33,385

Nigeria Demographic and Health Survey 2013

National Population Commission Abuja, Nigeria and ICF International, Rockville, USA

National (36 states and a federal capital territory)

2006 census with a population of 140,431,790

Three-stage stratified cluster design

38,948