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    SENEGAL - Niakhar HDSS INDEPTH Core Dataset 1984-2016 (Release 2018)

    Africa-2018
    Reference ID INDEPTH.SN013.CMD2016.v1
    Year 1984 - 2016
    Country SENEGAL
    Producer(s) Cheikh SOKHNA - Institut de Recherche pour le Développement (IRD)
    Laurence FLEURY - Institut de Recherche pour le Développement (IRD)
    Valérie Delaunay - Institut de Recherche pour le Dével
    Sponsor(s) Institut de Recherche pour le Développemt - IRD - Current funder
    Collection(s)
    Africa Region – Release 2018
    Metadata PDF Documentation in PDF
    Created on
    Jun 30, 2018
    Last modified
    Jun 30, 2018
    Page views
    27258
    • Study Description
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    Overview
    Identification
    Country
    SENEGAL
    Title
    Niakhar HDSS INDEPTH Core Dataset 1984-2016 (Release 2018)

    Translated Title
    Données récapitulatives du HDSS de Niakhar par l'INDEPTH 1984-2016 (Version 2018)

    Study Type
    Demographic Surveillance
    Series Information
    This dataset contains rounds 1 to 18 of demographic surveillance data covering the period from 1 Jan 2008 to 31 December 2016.

    An initial baseline census was carried out in 1962 for 8 villages, followed by another one in 1983 when the study area of Niakhar was expanded. From 1962 to 1987, data were collected through annual rounds during the dry season. Demographic events were collected by interviewers using a printed list of compound residents with their characteristics. From 1987 to 1997, rounds became weekly because of the need for continuous birth registration for vaccine trials. Annual censuses were carried out to check data collection, particularly relative to in- and out-migration. Routine visits were conducted in the 30 villages of the study area every three months between 1997and 2007 and every four months between 2008 and 2012 and every six month since then. Interviews are conducted with tablet PC since 2007. Verbal autopsies are completed after each round by trained personnel.

    ID Number
    INDEPTH.SN013.CMD2016.v1
    Version
    Version Description
    CMD2016.v1: Edited dataset for public distribution.

    Production Date
    2018-05-25
    Notes
    CMD2016.v1

    Overview
    Abstract
    The Health and Demographic Surveillance System (HDSS) in Niakhar, a rural area of Senegal, is located 135 km east of Dakar. This HDSS has been set up in 1962 by the Institut de Recherche pour le Développement (IRD) to face the shortcomings of the civil registration system and provide demographic indicators.

    Some 65 villages were followed annually in the Niakhar area from 1962 to 1969. The study zone was reduced to eight villages from 1969 to 1983, and from then on the HDSS was extended to include 22 other villages, covering a total of 30 villages for a population estimated at 45,000 in December 2013. Thus 8 villages have been under demographic surveillance for almost 50 years and 30 villages for 30years.

    Vital events, migrations, marital changes, pregnancies, immunization are routinely recorded (every four months). The database also includes epidemiological, economic and environmental information coming from specific surveys. Data were collected through annual rounds from 1962 to 1987; rounds became weekly from 1987 to 1997; routine visits were conducted every three months between 1997and 2007 and every four months since then.

    The current objectives are 1) to obtain a long-term assessment of demographic and socio-economic indicators necessary for bio-medical and social sciences research, 2) to keep up epidemiological and environmental monitoring, 3) to provide a research platform for clinical and interdisciplinary research (medical, social and environmental sciences). Research projects during the last 5 years are listed in Table 2. The Niakhar HDSS has institutional affiliation with the Institut de Recherche pour le Développement (IRD, formerly ORSTOM).

    Kind of Data
    Event history data

    Units of Analysis
    Individual

    Scope
    Notes
    This study represents only a portion of the total data associated with the complet Niakhar demographic surveillance as described in the study abstract.

    It specifically only includes the events defining the resident exposure of individuals under surveillance as well as the delivery events of resident women. Each type of event contains minimal attributes describing the event:

    Attributes common to each event:

    Event Type,

    Event Date

    Observation date

    Migration:

    Origin & Destination

    Delivery:

    Live born and Still born counts

    Topics
    TopicVocabularyURI
    Demography [N01.224] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Age Distribution [N01.224.033] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Emigration and Immigration [N01.224.625.350] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Residential Mobility [N01.224.791.700] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Sex Distribution [N01.224.803] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Vital Statistics [N01.224.935] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Life Expectancy [N01.224.935.464] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Mortality [N01.224.935.698] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Birth Rate [N01.224.935.849.500] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Rural Population [N01.600.725] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Maternal Age [N06.850.490.250.550] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Parity [N06.850.490.812.600] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Survival Analysis [N06.850.520.830.998] MeSHhttp://www.ncbi.nlm.nih.gov/mesh
    Keywords
    Migration, Mortality, Fertility, Population
    Coverage
    Geographic Coverage
    The study zone of Niakhar is located in Senegal, 14.5ºN Latitude and 16.5ºW Longitude in the department of Fatick (Sine-Saloum), 135 km east of Dakar. The Niakhar study zone covers 203 square kilometres and is located in the continental Sahelian-Sudanese climatic zone. For thirty years the region has suffered from drought. The average annual rainfall has decreased from 800 mm in the 1950s to 500 mm in the 1980s. Increasing amounts of precipitation have been observed since the mid-2000s with an average annual rainfall of 600 mm between 2005 and 2010.

    The area is 203 square kilometers.

    Universe
    Members of households reside within the demographic surveillance area. Inmigrants are defined by intention to become resident, but actual residence episodes of less than 180 days are censored. Outmigrants are defined by intention to become resident elsewhere, but actual periods of non-residence less than 180 days are censored, except seasonal work migrants, worker with a wife resident, pupils or students. Children born to resident women are considered resident by default, irrespective of actual place of birth.

    The dataset contains the events of all individuals ever resident during the study period (1 Jan 1990 to 31 Dec 2016).

    The Niakhar HDSS collects for each resident the following basic data: individual, household and compound identifying information, mother and father identification, relationship to the head of household and spousal relationship. From 1983 to 2007, the HDSS routinely monitored deaths, pregnancies, births, miscarriages, stillbirths, weaning, migrations, changes of marital status, immunizations, and cases of measles and whooping cough. For the last 5 years, the HDSS only recorded demographic events related to each resident including cause of death. Verbal autopsies have been conducted after all deaths except for those that occurred between 1999 and 2004 where only deaths for people aged 0-55 years were investigated. The Niakhar HDSS also registers visitors as well as all the demographic events related to them in case of in-migration. Household characteristics (living conditions, domestic equipment, etc.) were collected in 1998 and 2003, and community equipment (schools, boreholes, etc.) in 2003. Economic and environmental data will be collected in 2013. Table 3 presents further details on the data items collected. The Niakhar HDSS interviewers collect data with tablet PCs that are loaded with the last updated database linked to a user-friendly interface indicating the household members and the questionnaire. Daily backups are performed on an external hard drive and weekly synchronizations are scheduled during the round, helping to update the database and check data consistency (i.e. residential moves within the study area or marriages). Applications are Developed in Visual Basic.Net and the database is managed with Microsoft Access.

    Producers and Sponsors
    Primary Investigator(s)
    NameAffiliation
    Cheikh SOKHNA Institut de Recherche pour le Développement (IRD)
    Laurence FLEURY Institut de Recherche pour le Développement (IRD)
    Valérie Delaunay Institut de Recherche pour le Développement (IRD)
    El-Hadji Konko Ciré Bâ Institut de Recherche pour le Développement (IRD)
    Other Producer(s)
    NameAffiliationRole
    Mouhamadou Baba SOW Institut de Recherche pour le Développemt (IRD)Data Manager
    Adiouma FAYE Institut de Recherche pour le Développemt (IRD)Data collector
    All staff Data Collection Institut de Recherche pour le Développemt (IRD)Data collectors
    Funding
    NameAbbreviationRole
    Institut de Recherche pour le Développemt IRDCurrent funder
    Other Acknowledgements
    NameAffiliationRole
    Paul SENGHOR Institut de Recherche pour le Développemt (IRD)Verbal Autopsy Interviewer
    Emilie NDIAYE Institut de Recherche pour le Développemt (IRD)Referencies Manager
    Prosper NDIAYE Institut de Recherche pour le Développemt (IRD)Administrative Manager
    Malick TOURE Institut de Recherche pour le Développemt (IRD)Logistics Manager
    Metadata Production
    Metadata Produced By
    NameAbbreviationAffiliationRole
    ISHARE2Technical TEAMisTTINDEPTH NetworkDocumentation of the study
    INDEPTH Networkint.indpthINDEPTH Networkagency
    Mouhamadou Baba SOWMBSInstitut de Recherche pour le Développement(IRD)Data Manager
    Date of Metadata Production
    2018-05-25
    DDI Document Version
    SN013.CMD2016.v1 (May 2018)

    DDI Document ID
    DDI.INDEPTH.SN013.CMD2016.v1

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