title: Stratified Sampling of Neighborhood Sections for Population Estimation: A Case Study of Bo City, Sierra Leone.
abstract: There is a need for better estimators of population size in places that have undergone rapid growth and where collection of census data is difficult. We explored simulated estimates of urban population based on survey data from Bo, Sierra Leone, using two approaches: (1) stratified sampling from across 20 neighborhoods and (2) stratified single-stage cluster sampling of only four randomly-sampled neighborhoods. The stratification variables evaluated were (a) occupants per individual residence, (b) occupants per neighborhood, and (c) residential structures per neighborhood. For method (1), stratification variable (a) yielded the most accurate re-estimate of the current total population. Stratification variable (c), which can be estimated from aerial photography and zoning type verification, and variable (b), which could be ascertained by surveying a limited number of households, increased the accuracy of method (2). Small household-level surveys with appropriate sampling methods can yield reasonably accurate estimations of urban populations.
authors.affiliation: Information Technology Division, Naval Research Laboratory, Washington, District of Columbia, United States of America.
authors.forename: Roger
authors.initials: R
authors.lastname: Hillson
authors.affiliation: Information Technology Division, Naval Research Laboratory, Washington, District of Columbia, United States of America.
authors.forename: Joel D
authors.initials: JD
authors.lastname: Alejandre
authors.affiliation: Department of Global and Community Health, George Mason University, Fairfax, Virginia, United States of America.
authors.forename: Kathryn H
authors.initials: KH
authors.lastname: Jacobsen
authors.affiliation: Njala University, Bo, Sierra Leone; Mercy Hospital Research Laboratory, Bo, Sierra Leone.
authors.forename: Rashid
authors.initials: R
authors.lastname: Ansumana
authors.affiliation: Njala University, Bo, Sierra Leone; Mercy Hospital Research Laboratory, Bo, Sierra Leone.
authors.forename: Alfred S
authors.initials: AS
authors.lastname: Bockarie
authors.affiliation: Mercy Hospital Research Laboratory, Bo, Sierra Leone.
authors.forename: Umaru
authors.initials: U
authors.lastname: Bangura
authors.affiliation: Mercy Hospital Research Laboratory, Bo, Sierra Leone.
authors.forename: Joseph M
authors.initials: JM
authors.lastname: Lamin
authors.affiliation: Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, District of Columbia, United States of America.
authors.forename: David A
authors.initials: DA
authors.lastname: Stenger
mesh_terms: D002947:Cities; D016000:Cluster Analysis; D003198:Computer Simulation; D006801:Humans; D011156:Population Density; D012111:Residence Characteristics; D018401:Sample Size; D012807:Sierra Leone; D011795:Surveys and Questionnaires; D035501:Uncertainty; D014505:Urban Population / Q000706:statistics & numerical data*