IHI Research Data
#01. Health Demographic Surveillance System (HDSS)
The health and demographic surveillance system tracks populations in Kilombero/Ulanga, Rufiji and Kigoma of(120,336 +87,000 +Rufiji) individuals in (28,000 +18,000 + Rufiji) househods. Baseline data is updated by collecting information on vital events three times annually and, in case of deaths, probable cause is assigned by physicians using data collected through verbal autopsy. Events collected include births, deaths, in/out migration. Pregnancies are collected to ensure completeness in pregnancy outcomes and early child deaths. Information is collected for maternal and newborn indicators including ANC attendance, place of delivery and skilled assistance at delivery. Immunisation status is prospectively monitored in under-twos in all sites. New modules are also being added in some areas. Data on malaria parasitemia, fever and net ownership/use are collected in Ifakara and Rufiji. Anthropometric monitoring (height, weight, age) were collected in a sub-sample in all sites commencing 2010. And additional module to collect data on adult (15+yrs) HIV status is expected to commence in 2011. The HDSS also collects a range of household variables, including household composition, asset ownership (for proxy assessment of household wealth), educational status and physical location by GPS. Through unique identifiers of households and individuals, the dataset can be used for prospective, longitudinal analysis.
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#02. Sentinel Panel of Districts (SDP)
The Sentinel Panel of Districts comprises a sample of 24 councils out of a total of 131(check) mainland councils. The sampling frame was constructed so as to provide nationally representative estimates for Tanzania Mainland and to allow stratification for urban and rural areas. The SPD has two data arms. The facility-based data arm collects attendance, diagnosis and other facility data from all facilities within the selected districts. The population-based arm collects data on household, health and demographic variables from a (random) sub-sample of the selected districts. The variables collected are similar to those of the HDSS, although the periodicity of population census and household surveys is less frequent. The SPD began collecting facility-based data in late 2010 and these data-sets are incomplete as of December 2010. The population-based arm has yet to begin collecting data pending ethical approval.
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#03. Clinical Surveillance System (CSS)
Clinical surveillance (or Syndromic surveillance) refers to the surveillance (systematic collection, analysis, and interpretation) of health data about a clinical syndrome that has a significant impact on public health, which is then used to drive decisions about health policy and health education. This is distinct from active surveillance, which applies to individuals.
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#04. Verbal Autopsy (VA)
This is the method whereby a "probable cause of death" is assigned after the fact. The death is first reported during the 3-yearly rounds. When a death has been reported, a questionnaire is administered to household members to understand the circumstances and symptoms. In case the death took place in a health facility, the observations/diagnosis/treatment recorded is also collected. These data are passed on to a panel of medics who then asses each case and assign a "probable cause of death" based on the evidence available. In case they disagree, the case is referred for judgement by more verbal autopsy specialists. Cause classification follows an agreed typology which is used internationally across many sites using this verbal autopsy method.
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#05. Research Projects
The projects datasets comprise of over 70 data sets and meta data for different research studies past and present conducted by IHI scientists.
List of projects...