Transcript Evaluating the Completeness of the Civil Registration System Workshop on the Improvement of Civil Registration and Vital Statistics in the SADC Region, Blantyre,

Evaluating the Completeness of the
Civil Registration System
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Civil registration – Quality control
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Level of registration completeness
- All local registration areas carried the procedures
- Every vital event has a record on the system
- All local offices transmit the records up the ladder
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Direct methods
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Direct methods
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Matching – Using civil registration records as independent
source
Matching – Using administrative and social records
Matching – Using population censuses and surveys lists
Dual records system
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
M1. Civil registration records as independent source
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Evaluating birth register using death register
Consists of matching the death record with the birth
record
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Up to 30 years of age
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Not really a good measure – mobility of population
Useful for infant deaths
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Accuracy increases if births occur in medical facilities
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
M1. Civil registration records as independent source
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Hand matching
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If the number of infant deaths is small
If both events (birth and death) occur in the same health
facility
In the local registrar office, given the small numbers, a
feasible option
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
M1. Civil registration records as independent source
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Electronic matching
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Fast, effective approach
Having a PIN - advantage
Requirements
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Computerized records
Developing applications
Hardware
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
M1. Civil registration records as independent source
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Edit method
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Identify, for example, record with low birth-weights
Match with death record
If not found, check with the facility to confirm child is alive
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
M2. Administrative and social records
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Involves other organizations
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Matching birth and death records with:
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School enrolment
Hospital records
Baptism
Burial records
Newborn screening programs
Reporting of HIV
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
M3. Population census and survey records
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Lists of births and deaths
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Census enumeration areas
Census questions
Matching with civil registration records
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
M4. Dual record system
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Matching civil registration system (CVS) and
periodical retrospective survey (PRS)
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When information from two sources are matched, four
mutually exclusive sets of records emerge:
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Events recorded by both exercises
Recorded by CVS but not PRS
Recorded by PRS but not CVS
Not recorded by either source:
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
M4. Dual record system
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Not recorded by either source:
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N=C+N1+N2+((N1xN2)/C)
Where
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C = the number of vital events recorded by both methods
N1= the number of events recorded by the first method but not
the second
N2= the number of events recorded by the second method but
not the first
Thus, the events omitted by both:
» Y=((N1xN2)/C)
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Advantages and limitations of direct methods
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Advantages
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Two sources for matching
If both are quality sources and independent – accurate
Pointing to the cause
Feasible at all levels
Limitations
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Really independent?
Population movements undermine accuracy
Costs
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Indirect methods
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These methods were developed to assess the
completeness and quality of vital statistics
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Statistics is coming from civil registration
Statistics of low quality  most likely consequence of
errors in registering events
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Comparison of trends
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Indirect methods
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These methods were developed to assess the
completeness and quality of vital statistics
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Statistics is coming from civil registration
Statistics of low quality  most likely consequence of
errors in registering events
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Comparison of trends
Delayed registration
Patterns in the sex ratio of births
Comparison with census data
Comparison of rates observed in similar population or
previous periods
Incomplete data methods: indirect techniques
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Comparison of trends
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At small area level
Expected values established by previous trends
Unexpected current values
Large proportion of “unknown” answers
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Delayed registration
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Monitoring difference between date of occurrence
and date of registration
% of events not registered in prescribed period of
time – indicator of possible deficiency
Excessive proportion of delayed registration in
health facilities indicates overburden – inadequate
infrastructure
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Comparison with census data
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Quality of the census itself
Census content
If all basic components of population are accurately
captured by census – birth, deaths, immigrants,
emigrants, then
Intercensal population growth of population equals
the sum of intercensal births and immigrants minus
intercensal deaths and emigrants
Major obstacle – reliable migration statistics
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Comparison of rates
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Useful, but requires caution
Many factors, not necessarily linked to registration
errors
Differences in age structures
Population estimates
Skewed population
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Indirect techniques
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Technical approach
Long history of use
Complex
Require specific training
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008
Summary
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Checks and balances - crucial
A list of techniques
Best approach – a combination of direct and
indirect assessment
Computerization increases checking opportunities
Workshop on the Improvement of Civil Registration and Vital Statistics in the
SADC Region, Blantyre, Malawi, 1 – 5 December 2008