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Di Disent ntang ngli ling ng S Sex-Di -Different ntials ls i in De n Death R h Registration & n & Mortali lity E y Estima mates: : Preli limi mina nary F y Find nding ngs f from M m Morocco & & K Kuwait


slide-1
SLIDE 1

Romesh Silva, Ph.D.

Statistics Division, Economic and Social Commission for Western Asia United Nations Expert Group Meeting on Methodology for and Lessons Learned from CRVS Assessments Population Division, DESA, United Nations 3 November, 2016

Di Disent ntang ngli ling ng S Sex-Di

  • Different

ntials ls i in De n Death R h Registration & n & Mortali lity E y Estima mates: : Preli limi mina nary F y Find nding ngs f from M m Morocco & & K Kuwait

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SLIDE 2

Outline

2

  • Status of CRVS systems + mortality estimation in Western Asia
  • Regional strategy for CRVS systems improvements
  • Completeness assessment case studies: Kuwait & Morocco
  • Methodological limitations & next steps

Romesh Silva – UN DESA EGM, New York.

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SLIDE 3

Current Status of CRVS Systems

3 Source: Eastern Mediterranean Regional Office, World Health Organization, 2013.

Romesh Silva – UN DESA EGM, New York.

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SLIDE 4

Mortality & Registration Paradox

4

20 40 60 80 100 20 40 60 80 100 Under−five Mortality Rate Death Registration Completeness (%)

BAH EGY IRQ JOR KUW LBN MOR OMN QTR SAU PAL SDN SYR TUN UAE YEM

50 100 150 200 250 20 40 60 80 100 Adult Mortality Rate (45q15) Death Registration Completeness (%)

BAH EGY IRQ JOR KUW LBN MOR OMN QTR SAU PAL SDN SYR TUN UAE YEM

Romesh Silva – UN DESA EGM, New York.

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SLIDE 5

5

Egypt Iraq Jordan Kuwait Lebanon Libya Morocco Oman Qatar Saudi Arabia Sudan Syria Tunisia United Arab Emirates Yemen Bahrain Palestine

Source: United Nations, Department of Economic and Social Affairs, Population Dicvision (2013), World Population Prospects: The 2012 Revision

Mortality Data Source for WPP 2012 Vital Registration Derived from Child Mortality Estimates Survey Data Indirect Estimates from Population Census

Heavy reliance on non-CRVS sources by UN when estimating summary mortality measures

Romesh Silva – UN DESA EGM, New York.

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SLIDE 6

2014-2

  • 2019 R

Regiona nal S l Strategy: y: WHO-E

  • EMRO &

& UN UN-E

  • ESCWA F

Focus

6

  • Strengthen the registration

infrastructure and capacities

  • Improve production, use and

dissemination of vital statistics

  • Improve inter-sectoral coordination

and alignment among stakeholders

  • Strengthen and harmonize regional

and global partnerships in support

  • f country strategies
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SLIDE 7

Study Objectives

7

— To assess completeness and quality of recent death

registration data in Kuwait, and Morocco with a particular focus

  • n sex differences.

— Completeness: Proportion of all deaths (b/w ages 15-59) that were

registered by CRVS system

— Quality: whether the age, sex, geographic, temporal patterns in the

registration data are internally consistent and externally consistent with alternative data sources

— Understand current deficiencies in death registration as a first

step towards improvement of death registration systems and resulting DR-based mortality statistics

Romesh Silva – UN DESA EGM, New York.

slide-8
SLIDE 8

Current Approaches to CRVS Completeness (& Quality) Assessment

8

1.

  • 1. Self

lf-r

  • reporting

ng i in H n HH s surveys ys

— Reporting

ng b bias d due t to t termi mino nolo logical d l differenc nces

— Reporting

ng b bias d due t to s social d l desirabili lity y

2.

  • 2. Comparison o

n of r registered d deaths hs t to E E(deaths hs)

— Misali

lignme nment nt b between r n referenc nce p popula lations ns

— Large s

sampli ling ng e errors

3.

  • 3. Ind

Indirect d demo mographi hic e estima mation: n: De Death Di h Distribution M n Metho hods

— Strong

ng a assumptions ns: : [1]

[1] closed population, [2] completeness of

recording of deaths is constant by age, [3] the completeness of recording of population is constant by age, & [4] error-free age reporting

— Non-negligible uncertainty intervals (Murray et al., PLoSMed-2013)

4. 4.

Record-L

  • Link

nkage

— Labor i

int ntens nsive & & T Techni hnically c lly cha halle lleng nging ng

Romesh Silva – UN DESA EGM, New York.

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SLIDE 9

Data & Methods

9

  • Apply different variants of death distribution methods (DDMs) to data on

national populations:

  • Generalized Growth Balance (GGB) method uses the observed

population growth rates, the observed birth rate and the observed death rate to estimate the relative coverage of the population censuses along with the relative coverage of the death registration process.

  • Synthetic Extinct Generations (SEG) method compares the estimated

future cohort deaths to the current cohort’s population size as a means to assessing the completeness of the death registration process during the intercensal time period.

  • Adjusted-SEG method involves application of the GGB method to the

available data to adjust the raw data followed by application of the SEG method to the GGB-adjusted data.

Romesh Silva – UN DESA EGM, New York.

slide-10
SLIDE 10

Data & Methods

10

  • Apply different variants of death distribution methods (DDMs) to data on

national populations:

  • Generalized Growth Balance (GGB) method uses the observed

population growth rates, the observed birth rate and the observed death rate to estimate the relative coverage of the population censuses along with the relative coverage of the death registration process.

  • Synthetic Extinct Generations (SEG) method compares the estimated

future cohort deaths to the current cohort’s population size as a means to assessing the completeness of the death registration process during the intercensal time period.

  • Adjusted-SEG method involves application of the GGB method to the

available data to adjust the raw data followed by application of the SEG method to the GGB-adjusted data.

Romesh Silva – UN DESA EGM, New York.

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SLIDE 11

Methodological Assumptions

11

  • Coverage of each individual census is the same for all ages
  • Completeness of reporting of deaths is the same for all

ages from a minimum age (usually age 15)

  • Population is closed to migration (or information on migration is available)
  • No assumption of population stability (unlike earlier one-census methods)

Romesh Silva – UN DESA EGM, New York.

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SLIDE 12

Death Register: Age Ratio

12

0.0 0.5 1.0 1.5 2.0

Morocco

Age Group Age Ratio

5−9 10−14 15−19 20−24 25−29 30−34 35−39 40−44 45−49 50−54 55−59 60−64 65−69 70−74

Male Median Min Max Female Median Min Max

0.0 0.5 1.0 1.5 2.0

Kuwait

Age Group

5−9 10−14 15−19 20−24 25−29 30−34 35−39 40−44 45−49 50−54 55−59 60−64 65−69 70−74

Male Median Min Max Female Median Min Max

Romesh Silva – UN DESA EGM, New York.

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SLIDE 13

Death Register: Sex Ratio

13

100 200 300 400 500 600

Morocco

Age Group Sex Ratio (Males per 100 Females)

0−4 5−9 10−14 15−19 20−24 25−29 30−34 35−39 40−44 45−49 50−54 55−59 60−64 65−69 70−74 75−79 80+

Median Min Max

100 200 300 400 500 600

Kuwait

Age Group

0−4 5−9 10−14 15−19 20−24 25−29 30−34 35−39 40−44 45−49 50−54 55−59 60−64 65−69 70−74 75−79 80+

Median Min Max

Romesh Silva – UN DESA EGM, New York.

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SLIDE 14

Death Registration Completeness Estimates

14

Romesh Silva – UN DESA EGM, New York.

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SLIDE 15

Kuwait, , 2005-2

  • 2011

GGB Diagnostic Plots

15

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SLIDE 16

Kuwait , , 2005-2

  • 2011

SEG Diagnostic Plots

16

  • 0.0

0.5 1.0 1.5

Death registration completeness by age, male

c_5Nx aNx 15−19 25−29 35−39 45−49 55−59 65−69 75−79

  • c_5Nx

aNx

  • ● ●
  • −3

−2 −1 1 −3 −2 −1 1

Observed vs. Fitted Logits, male

Ys(x) Y(x)

  • 0.00

0.05 0.10 0.15

Smoothed vs. Adjusted Mortality Rates, male

Adjusted m_x Smoothed m_x 5−9 15−19 25−29 35−39 45−49 55−59 65−69 75−79 85+

  • 0.0

0.5 1.0 1.5

Death registration completeness by age, female

c_5Nx aNx 15−19 25−29 35−39 45−49 55−59 65−69 75−79

  • c_5Nx

aNx

  • −3

−2 −1 1 −3 −2 −1 1

Observed vs. Fitted Logits, female

Ys(x) Y(x)

  • 0.00

0.05 0.10 0.15

Smoothed vs. Adjusted Mortality Rates, female

Adjusted m_x Smoothed m_x 5−9 15−19 25−29 35−39 45−49 55−59 65−69 75−79 85+

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SLIDE 17

Kuwait, , 2005-2

  • 2011

Adjusted- SEG Diagnostic Plots

17

  • 0.0

0.2 0.4 0.6 0.8 1.0 1.2

Death registration completeness by age, male

c_5Nx aNx 15−19 25−29 35−39 45−49 55−59 65−69 75−79

  • c_5Nx

aNx

  • −3

−2 −1 1 −3 −2 −1 1

Observed vs. Fitted Logits, male

Ys(x) Y(x)

  • 0.00

0.05 0.10 0.15 0.20

Smoothed vs. Adjusted Mortality Rates, male

Adjusted m_x Smoothed m_x 5−9 15−19 25−29 35−39 45−49 55−59 65−69 75−79 85+

  • 0.0

0.2 0.4 0.6 0.8 1.0 1.2

Death registration completeness by age, female

c_5Nx aNx 15−19 25−29 35−39 45−49 55−59 65−69 75−79

  • c_5Nx

aNx

  • −3

−2 −1 1 −3 −2 −1 1

Observed vs. Fitted Logits, female

Ys(x) Y(x)

  • 0.00

0.05 0.10 0.15 0.20

Smoothed vs. Adjusted Mortality Rates, female

Adjusted m_x Smoothed m_x 5−9 15−19 25−29 35−39 45−49 55−59 65−69 75−79 85+

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SLIDE 18

Morocco, , 1994-2

  • 2004

GGB Diagnostic Plots

18

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SLIDE 19

Morocco, , 1994-2

  • 2004

SEG Diagnostic Plots

19

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SLIDE 20

Morocco, , 1994-2

  • 2004

Adjusted- SEG Diagnostic Plots

20

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SLIDE 21

Death Registration Completeness Estimates: Comparison with UNPD Official Estimates

21 Comparison Table of Adult Mortality Estimates (45q15) by Sex derived using the Adjusted SEG Method and those published in WPP, 2012

Romesh Silva – UN DESA EGM, New York.

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SLIDE 22

Tentative Conclusions

22

— Kuwait

— Limited insight from application of DDMs

— Published DR data only available for nationals (~1/3 of resident

population)

— DDMs sensitive to reporting errors/bias given small pop size

— Morocco

— Notable sex differential in DR completeness

— Likely a rural phenomenon, but need internal migration data

— Methodological

— Subjective-choice of age-trim — Effects of assumption violations

Romesh Silva – UN DESA EGM, New York.

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SLIDE 23

Next Steps

23 — Ku

Kuwait: investigate the nature of census enumeration & examine sex-specific CoD data

— Quantitative Study:

—

Evaluate Cause-of-Death (CoD) data from death register

—

small-scale record linkage study focused on young adult ages – linkable data source?

— Mo

Morocco cco: investigate the nature of sex differentials in death registration in urban areas vs. rural areas

— Quantitative Studies:

—

Replicate analysis using 2004 & 2014 Census data (and intercensal registration data)

—

Disaggregate by urban/rural (Census-2014 included migration questions)

—

Small-scale record linkage study – linking HH deaths in last 12-months (Census-2004) and registered deaths — Qualitative Study: Incentives for DR (by sex)

—

Ethnographic work to understand patrilineal inheritance tradition and impact of recent changes to Moroccan Family Code

—

Relationship b/w Burial permit process in urban/rural areas and DR completeness sex-differences

— Regiona

nal:

— Expand completeness assessments beyond Morocco, Kuwait, Egypt, Bahrain

—

Application of DDMs in Jordan, Tunisia, Oman(?), Sudan

—

Develop small-scale record-linkage studies [Egypt, Jordan, Palestine] — Coordination with 2020 Pop Census Round & HH survey programs

—

Inclusion of “HH deaths in last 12 months” question or kin-survival modules;

—

Inclusion of migration questions à for study of subnational variation Romesh Silva – UN DESA EGM, New York.

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SLIDE 24

Thank you!

24

Romesh Silva, Ph.D. Demographic and Social Statistics Section Economic and Social Commission for Western Asia United Nations

Email: silva22@un.org Tel: +961-1-278-727 Twitter: @Romesh_Silva

Romesh Silva – UN DESA EGM, New York.