Big Data, Social Determinants of Health, and Health ...
Transcript of Big Data, Social Determinants of Health, and Health ...
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Big data, social determinants of health, and health inequities
Sandro Galea
Boston University School of Public Health
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1. The trouble with the population’s health
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expectancy vs. health expenditure over time (1970-2014) I..,.,._,"'"""'° Health pending mea ure the con umption of health care good and services, including per onal health care (curative care, rehabilitative care, long-term care ancillary ervice and medical goods) and collective ervice (pr vention and public health . rvic s as well a h alth admini tration), but ex luding spending on inve tment . Shown i total health e:q,enditur (financed by public and private ource ).
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~ Spain
,/ 11taly
South K?~f!el
Japan
• _, . France Australia" Luxembourg
~ nad~ Sweden
~ Switzerland
Our World in Data. “The link between health spending and life expectancy: The US is an outlier.”
<https://ourworldindata.org/the-link-between-life-expectancy-and-health-spending-us-focus> Accessed September 7, 2016
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Total Population
1980 1990 2000 Year
2010
I I •
\ \
2020
Total Population -- Latino -- White -- Black
Andrasfay T, Goldman N. Reductions in 2020 US life expectancy due to COVID-19 and the disproportionate impact on the Black and Latino populations. PNAS 2021 Vol.
118 No. 5 e2014746118
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2. Understanding population health
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“The health outcomes of a group of individuals, including the distribution of such outcomes within the group ”
Kindig D, Stoddart G. What is population health? American Journal of Public Health 2003; 93;380-383.
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“The health outcomes of a group of individuals, including the distribution of such outcomes within the group ” Why? So that we may intervene
Kindig D, Stoddart G. What is population health? American Journal of Public Health 2003; 93;380-383.
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3. Four principles that can help
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a. Population health data as continuous, not binary
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Figure 1. Distribution of BMI in two populations illustrating health as a continuum in the
population
Panel A
%
20
15
5
BMl=30
Mean=23
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
BMI
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Rose G. Sick individuals and sick populations. International Journal of Epidemiology. 1985;14:32-38
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S EAU M CHOLESTEROL
Figure 3 Percentag.e cli:st.r"b fon ol serum hoJe.s erol eveJs {1:ng/dl) in m · n a,ged 50-62 who did or did not suJbsequently velop coronary heart. dtseitJ,se (Framingha . 1ud-y 5)
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Pepe MS, Janes H, Longton G, Leisenring W, Newcomb P. Limitations of the odds ratio in gauging the performance of a diagnostic, prognostic, or screening marker. American Journal of Epidemiology 2004; 159:882-890.
OR= 1.5 .,- OR= 3.0 ,,--,, ,, , / /
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FIGURE 2. Probability distributions of a marker, X, in cases (solid curves) and controls (dashed curves) consistent with the logistic model log~ itP(D = 1 IX) =a.+ ~X. It has been assumed that X has a mean of 0 and a standard deviation of 0.5 in controls so that a unit increase represents the difference between the 84th and 16th percentiles of X in controls. The marker is normally distributed with the same variance in cases. The odds ratio (OR) per unit increase in Xis shown.
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b. Illuminating ubiquitous causes
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Figure 1. A metaphor for ubiquity
The goldfish are surrounded by water and everything they do is influenced by the quality of the
water in which they live; therefore, water is a ubiquitous factor influencing the fish and needs to
be taken into consideration every time we may want to improve the lives of the fish.
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September 17, 1989 Crack Babies: Crack's Toll Among Babies: A Joyless View
September 6, 1988 The Worst Threat Is Mom Herself
, Cocaine: Litany of Fetal Risks
By DouglBB J. Besharov
LAST WEEK in this city, Greater Southeast Cam· munity Hospital released a 7-w ek-old- ~by to her home!~. drug-addicted mother eveo·.thouab·
the child was ~t severe risk of pulmona,ry arreet. ?ht hOIJ)ital'" dplanation: "Because lth6 mothu} , demanded that the baby be released."
Grows
The boepital provided the mother with an ;tpnea man--. itor to warn her if the baby stopped breathing while aslttp, and trained her in CPR. But on thJ? very first nipt, the mother went out drinking and left the child at a friend'& house-without the monitor. Within seven hours, the baby was dead. Like Dooney Waters, the t;. year-old living in hi mother' · drug den, whose shocking story was reported in The Washington Post last week, this child was all but abandoned b·,-----------------------------------ities. c
I
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.._,____.
Yo Can Sto S O lr .; ~ ~ '-~~·~-..
STOP DRINKING ALCOHOL
By C[a l9. .. Beck
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http://www.yourweightmatters.org/portion-sizes-changed-time/
Food
Bagel
Muffin
C heesebu rg er
Pasta (Spaghett i & Meatballs)
French Fries
Soda
Theater Popcorn
Turkey Sandwich
Pizza
...... ~911
20Years Ago
140 calories ' •~ (3" diameter)
.· .·· •\~
210 calories (1.5 oz)
333 calories
:>,:~~ 500 calories
210 calories (2.4 oz)
85 calories (6.5 oz)
270 calories (5 cups)
320 calories
- 500 calories (2 slices)
Today
350 calories ( 6" diameter)
500 calories (4oz)
590 calories
1025 calories
610calories (6.9 oz)
250 calories (20 oz)
630 calories (1 tub)
820 calories
850 calories (2 calories)
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c. The role of co-occurring causes
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How much of our obesity risk is determined by our genes?
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= GE+
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t
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= ENV+t
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= OB+
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= ENV+
Scenario 1
= OB+= GE+
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= ENV+
Scenario 1
= OB+= GE+
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= ENV+= OB+
Scenario 2
= GE+
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Therefore under a very plausible assumption of co-
occurring causes, the gene-obesity association can only be
understood if we understand the urban factors that create
the conditions for disease
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Rampersaud E, Mitchell BD, Pollin TI, Fu M, Shen H, O'Connell JR, et al. Physical Activity and the Association of Common FTO Gene Variants With Body Mass Index and
Obesity. Arch Intern Med. 2008;168(16):1791-1797.
29.5
29.0
28.5
28.0
27.5
~ 27.0
26.5
26.0
25.5
25.0
Genotype - AA - GA
GG
24.5-+------r---~-~--+-----r-------r-------r--------. -2.0 -1 .5 -1.0 -0.5 0 0.5 1.0 1.5 2.0
Residualized PhysjcaJ Activity
figure 3. Predicted body mass index (BMI) * calculated as weight in kilograms divided by height in meters squared, as a function of residualized age- and sex-specific In-transformed physical activity accelerometer counts according to FTO rs1861868 genotypes. On the left side of the plot (low physicaJ activity) 1 BMI levels are strikingly dissimilar between rs1861868 genotypes. In contrast* on the right side of the plot, similar BMI levels can be seen across genotypes* particularly in subjects mth very high levels of physicaJ activity.
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Meigs JB, Shrader P, Sullivan LM, McAteer JB, Fox CS, Dupuis J, Manning AK, Florez JC, Wilson PW, D'Agostino RB Sr, Cupples LA. Genotype score in addition to
common risk factors for prediction of type 2 diabetes. N Engl J Med. 2008 Nov 20;359(21):2208-19
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Meigs JB, Shrader P, Sullivan LM, McAteer JB, Fox CS, Dupuis J, Manning AK, Florez JC, Wilson PW, D'Agostino RB Sr, Cupples LA. Genotype score in addition to
common risk factors for prediction of type 2 diabetes. N Engl J Med. 2008 Nov 20;359(21):2208-19
A 100
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\,t-0 50 CV t)O ns
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d. The centrality of health equity
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Bor J, Cohen G, Galea S. Population Health in an Era of Rising Income Inequality: United States, 1980-2015. The Lancet. 2017; 389(10077):1475-1490
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Figure 5; Widening income-related inequalities in survival across birth cohorts
89 88
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46National Academy of Medicine. The growing gap in life expectancy by income: Implications for federal programs and policy responses. 2015.
http://www.nap.edu/download.php?record_id=19015#
lnequaUty in life expectancy widens for women
Wealth ier women can expect to Ii e longer than th ir parents did, while life
expectancy for poor women may have declined.
90
• 85
83.1 Upper middle •--------------------0 • •
1980
Life ex ectancy for 50- ea '-<>Ids in a gi n y ar, b
ye rs
79. 7 Lower middle
78.3 Poorest
2010,
uintil of incom over th previous 10
Sou re : a ional Ac d mi of Sci nc , En in rin nd M ,cit e
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Figure 1. Gain ing overall population heath
0
intervention
lnterv ntion adding: 1 DALY
Intervention adding
10 DALY
DALY-50
DALY= 25
DALY= 51
DALY= 25.5
DALY= 60
DALY - 30
In uali o 25 DAY
I equa ·, o 25.5 0 L
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Figure 2. Gaining overa ll population health while creating health inequalities
t DALY = 50
Before } No intervention inequality
t DALY =50
High SES
t DALY =60
After } Inequality of 5
intervention DALY
Low SES t DALY= 55 •••
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4. Methods for population health
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Populations are
1. Heterogeneous, ie have diversity of agents
2. Characterized by nonlinear dynamics
3. Characterized by contact structure, networks,
organization
4. Have feedback, adaptation, learning, evolution
5. Stochastic with important tails
6. Display emergent properties
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http://i.telegraph.co.uk/multimedia/archive/00796/crowded-britain_796405c.jpg
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Populations are
1. Heterogeneous, ie have diversity of agents
2. Characterized by nonlinear dynamics
3. Characterized by contact structure, networks,
organization
4. Have feedback, adaptation, learning, evolution
5. Stochastic with important tails
6. Display emergent properties
Complex systems
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Foresight - Tackling Obesities: Future Choices:<http://www.foresight.gov.uk/OurWork/ActiveProjects/Obesity/KeyInfo/Index.asp>
Figure 5.2: The full obesity ystem map with thematic cluster (see main text 5.1.2 for discuss1onJ17 ' 8 Var ab es ,He represented by bo es positive causal re at1ons,1Ips are ~ "' :: d by solid arrows and neg at v relat1ons'11ps b dott d mes The central ergIne Is h ghhgh1ed in ore. g at e centre of the map
Maps
Full Generic Map Thematic Clusters (fi lled)
Food Prod
SOcJol
I ( Psychologlul)
( ]I . Economk .
( Food j ( Ac1Mty ~ ( lnfrutructvre
(oeve loptM.nttl
_P_o_,1t_1v_e_ln_n_u_•n_o_• __.► ( 8'ologic;, I
cgative lnftuence J ..................... ( Mod,n l j
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Causes and counterfactuals
Observed
Counterfactual (parallel universe)
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Causes and counterfactuals
Observed
Counterfactual (parallel universe)
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Causes and counterfactuals
Observed
Counterfactual (parallel universe)
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“Treatment”Simulation
“Control”Simulation Exposed UnexposedTreatment Control
Population of Interest
Idealized Randomized Controlled Trial
Simulation Study(Agent-Based Counterfactual) Observational Study
TreatmentAssignment
ComputerSimulation
Study Design
Manipulation
Disease Distribution
CausalEffect?
Stratification or G-methods
Exposure or TreatmentDistribution
Yes Yes† Yes*
Marshall BDL, Galea S. Formalizing the role of complex systems methods in causal inference and epidemiology. American Journal of Epidemiology. 2015;181(2):92-99. .
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“Treatment”Simulation
“Control”Simulation Exposed UnexposedTreatment Control
Population of Interest
Idealized Randomized Controlled Trial
Simulation Study(Agent-Based Counterfactual) Observational Study
TreatmentAssignment
ComputerSimulation
Study Design
Manipulation
Disease Distribution
CausalEffect?
Stratification or G-methods
Exposure or TreatmentDistribution
Yes Yes† Yes*
Marshall BDL, Galea S. Formalizing the role of complex systems methods in causal inference and epidemiology. American Journal of Epidemiology. 2015;181(2):92-99. .
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“Treatment”Simulation
“Control”Simulation Exposed UnexposedTreatment Control
Population of Interest
Idealized Randomized Controlled Trial
Simulation Study(Agent-Based Counterfactual) Observational Study
TreatmentAssignment
ComputerSimulation
Study Design
Manipulation
Disease Distribution
CausalEffect?
Stratification or G-methods
Exposure or TreatmentDistribution
Yes Yes† Yes*
Marshall BDL, Galea S. Formalizing the role of complex systems methods in causal inference and epidemiology. American Journal of Epidemiology. 2015;181(2):92-99. .
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“ Everything should be made as simple as possible, but not simpler ”
Attributed to Albert Einstein.
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Simple approaches, a foundational myth
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The effectiveness of simple approaches?
Davey Smith G, Ebrahim S. Epidemiology-is it time to call it a day? International Journal of Epidemiology. 2001;30:1-11.
150 140 130 120 110 100 90
,B 80 ~ 70 0 60
50 40 30 20 10
Pump closed
1--- Onset of Fatal Cases I 0 -l--...----,.-------,----------.....!....--.--.....:......:::::=:~:::::;:=:::::2::=:::;=,..:-==~~~>-,
Aug Sep 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 31st 1st
( 668 Deaths: Onset date unknown = 127)
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5. The big picture
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Institutions
Neighborhoods and communities
Living conditions
Social relationships
Individual risk factors
Genetic/ constitutional factors
Pathophysiologic pathways
ividual/populat health
Figure 2.1 Levels of influence on the health of populations. Source: Modified from Kaplan, G.
What's wrong with social epidemiolog)7j and how can we make it better? Epid R ev. 2004; 26: 124-135.
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