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Mbita Health and Demographic Surveillance System core Dataset 2009-2011

Kenya, 2008 - 2011
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Reference ID
KEN_2009-2011_INDEPTH-MB_v01_M
Producer(s)
Nagasaki University Insititute of Tropical Medicine
Metadata
DDI/XML JSON
Study website
Created on
Dec 22, 2014
Last modified
Mar 29, 2019
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6133
  • Identification
  • Version
  • Scope
  • Coverage
  • Producers and sponsors
  • Sampling
  • Survey instrument
  • Data collection
  • Data processing
  • Data appraisal
  • Access policy
  • Data Access
  • Disclaimer and copyrights
  • Contacts
  • Metadata production

    • Identification

    Survey ID number

    KEN_2009-2011_INDEPTH-MB_v01_M
    Title

    Mbita Health and Demographic Surveillance System core Dataset 2009-2011
    Country
    Name Country code
    Kenya KEN
    Study type

    Demographic Surveillance
    Series Information

    Rounds 1 to 25
    Abstract

    The Mbita Health and Demographic Surveillance System (Mbita HDSS), located on the shores of Lake Victoria in Kenya, was established in 2006. The main objective of the HDSS is to provide a platform for population-based research on relationships between diseases and socio-economic and environmental factors, and for the evaluation of disease control interventions.
    The Mbita HDSS had a population of approximately 54 014 inhabitants from 11 576 households in June 2013. Regular data are collected using personal digital assistants (PDAs) every 3 months, which includes births, pregnancies, migration events and deaths. Coordinates are taken using geographical positioning system (GPS) units to map all dwelling units during data collection. Cause of death is inferred from verbal autopsy questionnaires. In addition, other health-related data such as vaccination status, socio-economic status, water sources, acute illness and bed net distribution are collected.

    The HDSS has also provided a platform for conducting various other research activities such as entomology studies including malaria research on neglected tropical diseases, and environmental health projects which have benefited the organization as well as the HDSS community residents. Data collected are shared with the community members, health officials, local administration and other relevant organizations. Opportunities for collaboration and data sharing with the wider research community are available and those interested should contact shimadam@nagasaki-u.ac.jp mailto:shimadam@nagasaki-u.ac.jp or mhmdkarama@yahoo.com mailto:mhmdkarama@yahoo.com.
    Kind of Data

    Event history data
    Unit of Analysis

    Individual

    Version

    Version Description

    Version 01: First version for internal use
    Version 03: Edited dataset for public distribution
    Version Date

    2014-03-07
    Version Notes

    Developed during iSHARE 2 workshop

    Scope

    Notes

    The Scope of demographic surveillance includes demographic characteristics, households, living conditions, social security, access to facilities and services, hygiene, education levels, employment status, migration, fertility, mortality, etc.

    • Household: Household characteristics, household listing, occupation, education and maternal mortality.
    • Individual: Individual listing, education, occupation, marital status and movements.
    • Women: Pregnancy monitoring
    Topics
    Topic Vocabulary URI
    Demography [N01.224] MeSH http://www.ncbi.nlm.nih.gov/mesh
    Rural Population [N01.600.725] MeSH http://www.ncbi.nlm.nih.gov/mesh
    Health [N01.400] MeSH http://www.ncbi.nlm.nih.gov/mesh
    Socioeconomic Factors [N01.824] MeSH http://www.ncbi.nlm.nih.gov/mesh
    Health Facilities [N02.278] MeSH http://www.ncbi.nlm.nih.gov/mesh
    Environment and Public Health [N06] MeSH http://www.ncbi.nlm.nih.gov/mesh

    Coverage

    Geographic Coverage

    Mbita HDSS covers part of the western Kenya near the shores of the Lake Victoria including Rusinga Island(North Part) and mainland labeled as Gembe in Gembe location(South Part). Area coverage is about 168KM square.

    The area is accessible by a ferry through the Lake victoria to the mainland of Lwanda Kotieno in Kisumu area of Kisumu County. There is also a tarmack road connection that goes through the mainland from the Homabay County to Mbita HDSS area and it is linked to the man-made bridge that links the the mainland to Rusinga Island.
    Universe

    All individuals in the HDSS survey area.

    Producers and sponsors

    Primary investigators
    Name Affiliation
    Nagasaki University Insititute of Tropical Medicine Collaborative partnership with the Kenya Medical Research Institute
    Producers
    Name Affiliation Role
    Prof. M. Shimada NUITM Team - Leader
    Prof. M. Karama NUITM-KEMRI Deputy Team Leader
    Prof. S. Kaneko NUITM Epidemiological Advisor
    Ms. S. Wanyua NUITM Field manager
    Mr. M. Ndemwa NUITM Data Manager
    Funding Agency/Sponsor
    Name Role
    Government of Japan Financial Support
    Nagasaki University Institute of Tropical Medicine Project Leadership and Technical Support
    Kenya Medical Research Institute Partnership affiliation and Technical Support
    Other Identifications/Acknowledgments
    Name Affiliation Role
    Morris Ndemwa NUITM Data Manager
    Mbita Community Partnership and cooperation in data collection
    County Leadership Devolved governmennt system (Homabay county) Partnership and cooperation in data collection

    Sampling

    Response Rate

    Response rate is about 95%.

    Survey instrument

    Questionnaires

    The questionnaire is divided into several parts. The 1st part consists of the baseline census dealing mainly with demographic information, such as compounds, household and members. The second part is made up of questions on migrations, health, diseases, causes of death, and other health and hygiene related information.

    These processes are repeated to accumulate demographic and health related information for several years.

    Data collection in the field uses electronic devices pda. These devises support field interviewers' data collection activities and execute data consistency checks with regard to questionnaire items on site.
    Assumed variables of questionnaire are:
    ø information for individual identification
    ø demographic information
    ø household information
    ø migration information
    ø pregnancy information
    ø health related information
    ø vital event information

    Collected data is accumulated in the field stations and sent to data management centre in the central office in nairobi, and are subjected to detail-verification check by data managers. If inconsistent data or unverified data are detected, those data and error codes (or explanation) are sent back to the field.

    Verbal Autopsy Questionaires design was made with some modifications but adapted from the recommended WHO questionnaire.

    Data collection

    Dates of Data Collection
    Start End Cycle
    2008-10-14 2008-12-17 1
    2009-01-08 2009-02-16 2
    2009-02-17 2009-03-08 3
    2009-03-11 2009-04-06 4
    2009-04-09 2009-05-07 5
    2009-05-10 2009-06-01 6
    2009-06-05 2009-07-01 7
    2009-07-02 2009-07-28 8
    2009-07-30 2009-08-19 9
    2009-08-21 2009-09-16 10
    2009-09-18 2009-10-20 11
    2009-10-23 2009-11-30 12
    2009-12-02 2009-12-30 13
    2010-01-08 2010-03-03 14
    2010-03-05 2010-04-16 15
    2010-04-23 2010-06-07 16
    2010-06-10 2010-07-14 17
    2010-07-20 2010-09-20 18
    2010-09-22 2010-11-19 19
    2010-11-23 2010-12-23 20
    2011-01-12 2011-03-01 21
    2011-03-11 2011-05-05 22
    2011-06-02 2011-07-20 23
    2011-09-28 2011-10-30 24
    2011-11-01 2011-12-24 25
    Frequency of Data Collection

    At-least 4 rounds per year
    Time periods
    Start date End date Cycle
    2009-01-01 2011-12-31 25
    Data Collectors
    Name Affiliation
    Mbita HDSS NUITM,KEMRI
    Supervision

    Enumerators (field interviewers) were organized in teams per working areas and regions which they are assigned to all interviwers. All enumarators report to a supervisor(field interviewer manager) who is assigned about 6 enumarators and he/she is able to manage them by using an assigned motorbike to move from one working area to the other. The field interviewer manager (supervisor) roles include the following: coordinate data collection, supplies of equipment and gadgets, coordinating with local authorities, quality assuarance report including checking empty houses/structures, conducting verbal autopsy after the mourning period has passed and following up on skipped houses which may have been skipped by enumarotors if for some reasons owners were absent or only minors were available during the visit.

    The data manager at the field station was responsible for the transfer of collected data to our remote server for cleaning before synchronization of the data and backup. The data manager would go through the quality check reports generated automatically by the system and assignes duties to field interviewer manager based on the results for updates and corrections.

    Upper management from the (Nairobi) managing the core data set visited the field once every month and after every round had been completed.
    Data Collection Notes

    Training of enumerators (known as filed interviewres in Mibita HDSS site) is routinely done before the start of any new round.
    This is usually done to familiarize with the system updates on the programme or any additional changes that may seem necessary and necessitate smooth running of the data collection criteria or inform the enumarotors of the anychanges that they may have suggested for the smooth running of data collection process.

    • Usually interview may take about 30mins to about 45mins depending on whether there were any additional questionaires added to their routine data collection method.
    • Community mobilization and sensitization was first done before data collection at the baseline.
    • In addition, more involvement was done to inform community leaders especially the chiefs, leaders and community heads (including policy makers) of the objectives of the HDSS programe.
    • The data collection team has usually been conducted by field interviewers (FI) 17 in number guided by immediate supervisors that are named as field interviewer manager (FIM) who are 3 in number.
    • Supervisory team comprising of a data manager at the field station and an asdministrator would oversee the whole process and they may seek intervention by community leaders in areas where the community may not seem intrested or refusing to accept enumaration.
    • Interview is normally done in local language (Luo) or in Swahili where there find in-migrants.

    Data processing

    Data Editing

    Data management is conducted on PDA, Station PC and main server database.
    For quality control, several error check programmes were installed, for the following purposes: range checks, entry missing checks, inter-variable checks, consistency check between currently entered data and past data, etc.

    Data was left censored to 1 Jan 2009 to account for the start-up phase of the surveillance.

    Data appraisal

    Data Appraisal

    CenterID = KE041
    MetricTable = RawMicroData
    QMetric = Starts
    Illegal = 1115
    Legal = 80897
    Total = 82012
    Metric = 1.
    RunDate = 2014-03-05 12:40

    CenterID = KE041
    MetricTable = RawMicroData
    QMetric = Transitions
    Illegal = 2603
    Legal = 165594
    Total = 168197
    Metric = 1.
    RunDate = 2014-03-05 12:40

    CenterID = KE041
    MetricTable = RawMicroData
    QMetric = Ends
    Illegal = 1310
    Legal = 80702
    Total = 82012
    Metric = 1.
    RunDate = 2014-03-05 12:40

    CenterID = KE041
    MetricTable = RawMicroData
    QMetric = SexValues
    Illegal = 0
    Legal = 168197
    Total =
    Metric =
    RunDate = 2014-03-05 12:41

    CenterID = KE041
    MetricTable = RawMicroData
    QMetric = DoBValues
    Illegal = 218
    Legal = 167979
    Total = 168197
    Metric = 0.
    RunDate = 2014-03-05 12:41

    CenterID = KE041
    MetricTable = MicroDataCleaned
    QMetric = Starts
    Illegal = 0.
    Legal = 79446
    Total = 0.
    Metric = 0.
    RunDate = 2014-03-05 12:51

    CenterID = KE041
    MetricTable = MicroDataCleaned
    QMetric = Transitions
    Illegal = 207
    Legal = 162478
    Total = 162685
    Metric = 0.
    RunDate = 2014-03-05 12:51

    CenterID = KE041
    MetricTable = MicroDataCleaned
    QMetric = Ends
    Illegal = 0.
    Legal = 79446
    Total = 0.
    Metric = 0.
    RunDate = 2014-03-05 12:51

    CenterID = KE041
    MetricTable = MicroDataCleaned
    QMetric = SexValues
    Illegal = 0.
    Legal = 162685
    Total = 0.
    Metric = 0.
    RunDate = 2014-03-05 12:51

    CenterID = KE041
    MetricTable = MicroDataCleaned
    QMetric = DoBValues
    Illegal = 218
    Legal = 162467
    Total = 162685
    Metric = 0.
    RunDate = 2014-03-05 12:51

    CenterID = KE041
    MetricTable = MicroDataAnonymised
    QMetric = Duplicated events
    Illegal = 6748
    Legal = 155937
    Total = 162685
    Metric = 4.
    RunDate = 2014-03-05 13:02

    CenterID = KE041
    MetricTable = KE041_CMD_2011_v1_S01
    QMetric = Temporal Integrity Violations
    Illegal = 0.
    Legal = 172247
    Total = 172247
    Metric = 0.
    RunDate = 2014-03-05 13:02

    CenterID = KE041
    MetricTable = KE041_CMD_2011_v1_S02
    QMetric = Close OMG-IMG pairs
    Illegal =9
    Legal = 12
    Total = 21
    Metric = 42
    RunDate = 2014-03-05 13:03

    CenterID = KE041
    MetricTable = KE041_CMD_2011_v1_S02
    QMetric = EXT-ENT pairs with big gap
    Illegal =0
    Legal = 9
    Total = 9
    Metric = 0.
    RunDate = 2014-03-05 13:06

    Access policy

    Location of Data Collection

    INDEPTH Data Repository
    Archive where study is originally stored

    INDEPTH Data Repository
    http://www.indepth-ishare.org/index.php/catalog/47
    Cost: None

    Data Access

    Access authority
    Name Affiliation URL Email
    iSHARE2 INDEPTH http://indepth-ishare.org help-data@indepth-network.org
    Confidentiality
    Is signing of a confidentiality declaration required? Confidentiality declaration text
    yes This data is anonymised and no confidentiality agreement in addition to the general data use agreement is required.
    Access conditions
    1. Data and other material provided by INDEPTH will not be redistributed or sold to other individuals, institutions or organisations without INDEPTH's written agreement.
    2. Data originating from a single contributing member centre of the INDEPTH Network may not be analysed or reported on in isolation without the express permission of the member centre concerned.
    3. No attempt will be made to re-identify respondents, and there will be no use of the identity of any person or establishment discovered inadvertently. Any such discovery will be reported immediately to INDEPTH.
    4. No attempt will be made to produce links between datasets provided by INDEPTH or between INDEPTH data and other datasets that could identify individuals.
    5. Any books, articles, conference papers, theses, dissertations, reports or other publications employing data obtained from INDEPTH will cite the source, in line with the citation requirement provided with the dataset.
    6. An electronic copy of all publications based on the requested data will be sent to INDEPTH.
    7. The original collector of the data, INDEPTH, and the relevant funding agencies bear no responsibility for the data's use or interpretation or inferences based upon it.
    Citation requirements

    Any use of this dataset must cite the digital object identifier (doi) associated with this dataset. Using the following form:

    "The Mbita HDSS Core Micro Data Set 2009-2011. March 2014. Provided by the INDEPTH Network Data Repository. www.indepth-network.org http://www.indepth-network.org. 10.7796/INDEPTH.KE041.CMD2011.v3 http://dx.doi.org/10.7796/INDEPTH.KE041.CMD2011.v3"

    Disclaimer and copyrights

    Disclaimer

    The user of the data acknowledges that the original collector of the data, INDEPTH, and the relevant funding agencies bear no responsibility for the data's use or interpretation or inferences based upon it.

    Contacts

    Contacts
    Name Affiliation Email URL
    iSHARE2 Helpdesk INDEPTH Network help-data@indepth-network.org http://www.indepth-ishare.org/index.php/howtouse

    Metadata production

    DDI Document ID

    DDI_KEN_2009-2011_INDEPTH-MB_v02_M
    Producers
    Name Affiliation Role
    Mbita HDSS NUITM,KEMRI Documentation of the study
    iSHARE2 Technical Team INDEPTH Network Technical support
    INDEPTH Network INDEPTH agency
    Date of Metadata Production

    2014-04-01

    Metadata version

    DDI Document version

    Edited version, the original DDI (DDI.INDEPTH.KE041.CMD2011.V6) was downloaded from INDEPTH Data Repository (http://www.indepth-ishare.org/index.php/catalog/central) on October 2014. The following DDI elements have been modified: DDI Document ID, survey ID and title of the study.
    Version notes

    DDI.INDEPTH.KE041.CMD_2011.V1 2014-3-4 First document
    DDI.INDEPTH.KE041.CMD-2011.V2 2014-3-6 Document temp updated to V5
    DDI.INDEPTH.KE041.CMD-2011.V32014-03-07 updated MD5#INDEPTH.KE041.CMD-2011.V3
    DDI.INDEPTH.KE041.CMD-2011.V32014-03-07 updated MD5#INDEPTH.KE041.CMD-2011.V4
    DDI.INDEPTH.KE041.CMD-2011.V32014-03-14 updated MD5#INDEPTH.KE041.CMD-2011.V5
    DDI.INDEPTH.KE041.CMD-2011.V32014-03-17 updated MD5#INDEPTH.KE041.CMD-2011.V6
    DDI.INDEPTH.KE041.CMD2011.V32014-03-26 updated MD5#INDEPTH.KE041.CMD2011.V6
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