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© CPHIT @ JHSPH-HPM 1
© 2014, Johns Hopkins University. All rights reserved.
.
Welcome to DHSI Grand Rounds
CME Credit Tracking SystemActivity Code for May 10, 2019:
Code:19060
Jonathan Weiner ([email protected])
Hadi Kharrazi ([email protected])
Johns Hopkins UniversityBloomberg School of Public HealthDepartment of Health Policy and Management
The application of “Big Data” in support of population health: Recent advances from the
JHU Center for Population Health IT (CPHIT)
DHSIMay 2019
© CPHIT @ JHSPH-HPM 3
For CME Credit
Speakers: Jonathan Weiner, DrPH & Hadi Kharrazi, MHI MD PhD
Health Sciences Informatics Grand Rounds May 10 2019
•Text to : 443-541-5052
•Text code: 19060
© CPHIT @ JHSPH-HPM 4
Recording Your Attendance via CloudCMEat a CME RSS Activity for the first time
If this is the first time you are texting your attendance, you must first pair your mobile number to your account.
Step 1: Text your email address to (443) 541-5052. The email address should be your JHMI email or email you have used to receive your CME credits at in the past. You will receive a text notification indicating your phone number has been updated.
Step 2: Once your account is paired to your mobile number and you have obtained the activity code, send the activity code via text to: (443) 541-5052
Please Note: if you have never had a CME certificate/credits awarded and need a user profile created, please log onto https://hopkinscme.cloud-cme.com and click the “Sign Up Now” button.
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© CPHIT @ JHSPH-HPM 5
Accreditation Statements:
Accreditation Statement:The Johns Hopkins University School of Medicine is accredited by the Accreditation Council for Continuing Medical Education (ACCME) to provide continuing medical education for physicians.
Credit Designation Statement:The Johns Hopkins University School of Medicine designates this live activity for [0.0] credit(s) per session for a maximum of [0.0] AMA PRA Category 1 Credit(s)TM . Physicians should claim only the credit commensurate with the extent of their participation in the activity.
Policy of Speaker and Provider Disclosure:It is the policy of the Johns Hopkins University School of Medicine that the speaker and provider globally disclose conflicts of interest. The Johns Hopkins University School of Medicine OCME has established policies in place that will identify and resolve all conflicts of interest prior to this educational activity. Detailed disclosure will be made in the instructional materials.
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© CPHIT @ JHSPH-HPM 6
Jonathan Weiner and Hadi Kharrazi report that they have no disclosures
Disclosures:
Speakers: Jonathan Weiner, DrPH & Hadi Kharrazi, MHI MD PhD
Health Sciences Informatics Grand Rounds May 10 2019
© CPHIT @ JHSPH-HPM 7
1. Articulate conceptual and data integration frameworks developed by CPHIT and others to help define the field of population health informatics.
2. Describe the trajectory and current portfolio of CPHIT research involving integration of 20+ million EMR records, tens of millions of insurance claims, consumer data, GIS data, public health data, and social/human services data.
3.Provide examples of research and development focusing on the incorporation of novel digital data into population and community level prediction models focusing on an array of different critical outcomes.
CME Learning Objectives
The application of “Big Data” in support of population health: Recent advances from the JHU Center for Population Health IT (CPHIT)
Speakers: Jonathan Weiner, DrPH & Hadi Kharrazi, MHI MD PhD
Health Sciences Informatics Grand Rounds May 10 2019
© CPHIT @ JHSPH-HPM 8
Overview of Today’s Talk1) Population Health Informatics
• Emerging Field
• Data Sources & Types
• Scope of CPHIT’s Work
2) CPHIT Portfolio• EHR-based Prediction (eACG)
o Assessing New EHR content when added to claims:
o Free-texto vital Signs, o eRxo Labs
o Machine Learning and Predictions• Geographic Factors (elderly falls & VA)
• Linking Diverse Data to Identify Opioid Overdose Risk
• Social Determinants of Health
3) Discussion• Challenges & Opportunities
• Collaboration Opportunities
© CPHIT @ JHSPH-HPM 9
Population Health Informatics
© CPHIT @ JHSPH-HPM 10
Population Health Informatics Emerging Field
Triple Aims developed by the Institute for Healthcare Improvement (IHI)
Better Health for the Population
Better Care for the Individuals
Lower Cost Through Improvements
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© CPHIT @ JHSPH-HPM 11
Molecular Research Health Research
Biomedical informatics as a basic science
Basic Research
Applied Research
Biomedical informatics methods, techniques, and theories
Bioinformatics
ImagingInformatics
ClinicalInformatics
Public HealthInformatics
Consumer HealthInformatics
PopulationHIT
Population Health Informatics Emerging Field
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Community / PopulationIDS / ACO / Virtual Net
Family and Care giversPractice Team
Physician Patient
ClaimsMISHIS CPOE
CDSSEHR PHR
mHealthapps
Biomet.Tele-H.
NationalDatasets
HIE
Social Network
SocialHR data
GIS
Public Health Systems
Web Portals
emailand
others
Weiner, 2012 http://www.ijhpr.org/content/1/1/33
Population Health Informatics Data Sources
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Population Health Informatics Data Analytic Cycle
Generate & Integrate New Data from Knowledge
Population Health Database Development
Data Preparation &Data Quality Checks
Extracting Knowledgeby Modeling and Data Mining
Creating Generalizable Knowledgeby Model Validation and Evaluation
Store, Share and Use the Knowledge
0100200300400500
0 20 40 60
y = β0 +β1x1 + … +βnxn
• Validity• Reliability• Goodness of Fit• Consistency• Parsimony• ReproducibilityX Y Z
X Y ZX Y Z
• Quality• Missing• Transf.
Base(Year-0)
Outcome(Year-1)
PredictDemographics; Diagnosis; Medications; Cost and etc.
Cost; Mort.; ER-admit; Hospitalization; Readmit;
x1, x2, …, xn y (binary, cont.)
Research and Operations
Population Health Data Warehouse
Overall Population Health Knowledge Management Process
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The Johns Hopkins
Center for Population Health Information Technology(CPHIT, or “see-fit”)
The mission of this innovative, multi-disciplinary R&D center is to improve the health and well-being of populations by advancing the state-of-the-art of Health IT across public and private health organization.
CPHIT focuses on the application of electronic health records (EHRs), mobile health and other e-health and HIT tools targeted at communities and populations.
Director: Dr. Weiner
Research Director: Dr. Kharrazi
10+ Core Colleagues, Additional 15+ Collaborating Colleagues
www.jhsph.edu/cphit
© CPHIT @ JHSPH-HPM 15
CPHIT Research Portfolio
© CPHIT @ JHSPH-HPM 16
CPHIT Portfolio
Research Portfolio (selected list)
• Claims-based JHU-ACG
• EHR-based Prediction (eACG)
o EHR vs. Claims (dem., Dx, Rx)
o EHR Vital Signs (BMI/BP)
o EHR Prescription (adherence)
o EHR Labs (common labs)
o EHR Free-text (geriatric frailty)
• Geographic Factors (elderly falls & VA)
• Opioid Overdose Predictive Models
• Social Determinants of Health
© CPHIT @ JHSPH-HPM 17
CPHIT Portfolio Claims-based Risk Stratification (ACG) acg.jhsph.edu
Case-Management
Disease Management Practice
ResourceManagement
HighDisease Burden
Single High Impact Disease
Users
Users & Non-Users
Population Segment
NeedsAssessment
Quality Improvement
Payment/Finance
Management Applications
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CPHIT Portfolio Claims-based Risk Stratification (ACG)
https://www.hopkinsacg.org/
© CPHIT @ JHSPH-HPM 19
CPHIT Portfolio EHR vs. Claims
Data Source(a)
Characteristic Claims EHR(b) Purpose Reimbursement Clinical care
Scope All providers, including out of network providers, for a given patient Network providers of a patient
Data consistency High consistency across sources Lower consistency across sources Data structure Most of data is structured Considerable unstructured data Coding standard Strict adherence to coding systems Variable adherence to coding systems Provider coverage All providers accepting the insurance Limited to providers using same EHR Coding limit Limited to encoded data Provides ability to enter free text Member limitation Limited to insured patients Insured and uninsured patients Coverage limitation Non-covered items are missing Includes data on non-covered items Data type Limited (mainly enrollment, Dx, Rx) Additional data types (see below)
Data Availability Claims EHR(b) Demographics(a) Yes Yes Race/ethnicity Limited Limited Diagnosis(a) Yes Yes Procedures Yes Yes Eligibility Yes Limited Medications(a) Pharmacy data (drugs dispensed) Prescriptions ordered & MedRec data Socioeconomic data Zip-code derived Coded and zip-code derived Family history Not available Yes Problem list Not available Yes Procedure results Not available Yes Laboratory results Not available Yes Vital signs Not available Yes Behavioral risk factors Not available Limited
Standardized surveys Limited Limited
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CPHIT Portfolio EHR vs. Claims (cont.)
Comparing Claims and EHR for Risk Stratification
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CPHIT Portfolio EHR vs. Claims (cont.)
Comparing Various Overlaps of Claims and EHR for Risk Stratification
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CPHIT Portfolio EHR vs. Claims (cont.)
Comparing Diagnostic Data Found in Claims (C) vs EHRs (E)
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
V27.
0V5
7.1
795.
0173
9.3
722.
4V1
2.72
429.
372
1.3
216.
664
6.83
728.
8542
7.89
276.
51 650
424
V72.
3151
9.11
715.
95V2
8.89 34
786.
5957
4.2
787.
0378
4.2
368.
872
4.3
463
787.
171
9.43
692.
7455
8.9
388.
770
221
6.8
218.
978
6.09
729.
536
5.01
704.
870
6.8
726.
545
5.3
216.
9V2
8.81
V74.
1V7
8.9
493.
9279
0.29
367.
411
0.1
V49.
81 734
375.
15V2
5.11
692.
9V0
4.81
780.
5723
9.2
333.
94V4
5.86
623.
579
0.93
782.
942
7.31 79
147
7.9
698.
137
4.87
V77.
1V5
8.32 79
540
1.9
V72.
0V7
6.10
Top Dx (ICDs) with at least 1000 instances - distribution of C, CE, and E source of data
E
CE
C
More records in Claims than other
sources of Dx
More records in Claims + EHRs
than other sources of Dx
Recordsin EHRs
only
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© CPHIT @ JHSPH-HPM 23
CPHIT Portfolio EHR vs. Claims (cont.)
Cases found in EHR versus Claims:Diabetes, Hypertension, Depression, Cancer
© CPHIT @ JHSPH-HPM 24
CPHIT Portfolio EHR vs. Claims (cont.)
Model performance using EHR versus Claims
© CPHIT @ JHSPH-HPM 25
CPHIT Portfolio EHR Vital Signs (BMI)
Value of BMI in Predicting Utilization
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© CPHIT @ JHSPH-HPM 26
CPHIT Portfolio EHR Vital Signs (BMI) (cont.)
Value of BMI in Predicting Utilization
© CPHIT @ JHSPH-HPM 27
CPHIT Portfolio EHR Prescription
Value of EHR’s Prescription vs. Claims Filling in Predicting Utilization
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© CPHIT @ JHSPH-HPM 28
CPHIT Portfolio EHR Prescription (cont.)
Value of EHR’s Prescription vs. Claims Filling in Predicting Utilization
© CPHIT @ JHSPH-HPM 29
CPHIT Portfolio EHR Labs
Value of EHR’s Common Lab Results in Predicting Utilization
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© CPHIT @ JHSPH-HPM 30
CPHIT Portfolio EHR Labs (cont.)
Value of EHR’s Common Lab Results in Predicting Utilization
© CPHIT @ JHSPH-HPM 31
Machine Learning and Predictive Modeling
© CPHIT @ JHSPH-HPM 32
CPHIT Portfolio EHR Free-text (Geriatric Frailty)
Value of EHR’s Free-text in Identifying Frailty and Predicting Utilization
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© CPHIT @ JHSPH-HPM 33
CPHIT Portfolio EHR Free-text (Geriatric Frailty) (cont.)
Claims
EHR Structured
EHR Free Text
(NLP)
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© CPHIT @ JHSPH-HPM 34
CPHIT Portfolio EHR Free-text (Geriatric Frailty) (cont.)
Added value of free text represented by the Venn diagramCircle sizes represent the number of patients identified by each methodology/data-source
Green: EHR Free Text; Blue: EHR Structured; Red: Insurance Claims
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© CPHIT @ JHSPH-HPM 35
CPHIT Portfolio EHR Free-text (Geriatric Frailty) (cont.)
Value of EHR’s Common Lab Results in Predicting Utilization
© CPHIT @ JHSPH-HPM 36
CPHIT Portfolio Geographic Factors (Elderly Falls)
Prevalence of falls among elderly in Baltimore City (Census Block Group)
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© CPHIT @ JHSPH-HPM 37
CPHIT Portfolio Geographic Factors (Elderly Falls) (cont.)
Prevalence of falls among elderly in Maryland (Census Block Group)
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© CPHIT @ JHSPH-HPM 38
CPHIT Portfolio Geographic Factors (Elderly Falls) (cont.)
Predictors and coefficients of the elderly-fall model
Predictors Estimate Std. error z value Pr(>|z|) Significance OR 2.50% 97.50%
History of fall 1.795 0.074 24.113 <2e-16 *** 6.02 5.20 6.97
Fracture 0.604 0.104 5.821 5.85E-09 *** 1.83 1.49 2.24
Substance Abuse 0.520 0.082 6.364 1.96E-10 *** 1.68 1.43 1.97
Parkinson 0.337 0.178 1.895 0.058056 . 1.40 0.98 1.97
Kyphoscoliosis 0.322 0.153 2.102 0.035519 * 1.38 1.01 1.85
Sex (female) 0.173 0.046 3.736 0.000187 *** 1.19 1.09 1.30
Depression 0.146 0.068 2.141 0.032238 * 1.16 1.01 1.32
Mental Illness 0.128 0.065 1.980 0.047652 * 1.14 1.00 1.29
Age 0.038 0.003 14.895 <2e-16 *** 1.04 1.03 1.04
Charlson Index -0.053 0.009 -5.711 1.12E-08 *** 0.95 0.93 0.97
Vision -0.211 0.057 -3.689 0.000225 *** 0.81 0.72 0.91
Obesity -0.251 0.076 -3.311 0.000931 *** 0.78 0.67 0.90
Cardiovascular Disease -0.313 0.050 -6.301 2.95E-10 *** 0.73 0.66 0.81
Lower Urinary Tract Symptoms -0.345 0.074 -4.656 3.23E-06 *** 0.71 0.61 0.82
Hypertension -0.357 0.050 -7.080 1.44E-12 *** 0.70 0.63 0.77
Cancer -0.441 0.081 -5.418 6.02E-08 *** 0.64 0.55 0.75
Lower Back Pain -0.495 0.067 -7.368 1.73E-13 *** 0.61 0.53 0.69
Joint Trauma -0.526 0.197 -2.674 0.007487 ** 0.59 0.39 0.85
Lower Extremity Joint Surgery -1.069 0.182 -5.870 4.36E-09 *** 0.34 0.24 0.48
(Intercept) -4.372 0.197 -22.249 <2e-16 *** 0.01 0.01 0.02
Significance codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1
© CPHIT @ JHSPH-HPM 39
CPHIT Portfolio Geographic Factors (VHA Obesity)
Geographic distribution of obesity among VHA population (Limited to 29,322 visits occurred in one day of 2013; generated using CDW data)
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CPHIT Portfolio Geographic Factors (VHA Obesity) (cont.)
County BMI (using MLM adjustment) for Males 2000-2015
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© CPHIT @ JHSPH-HPM 41
CPHIT Portfolio Geographic Factors (VHA Obesity) (cont.)
County BMI (using MLM adjustment) for Males 2000-2015
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© CPHIT @ JHSPH-HPM 42
CPHIT Portfolio Geographic Factors (VHA Obesity) (cont.)
County BMI (using MLM adjustment) for Males 2015 (DC and Baltimore)
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© CPHIT @ JHSPH-HPM 43
Kilometers
Spatial Intensity Male 2015
CPHIT Portfolio Geographic Factors (VHA Obesity) (cont.)
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© CPHIT @ JHSPH-HPM 44
CPHIT Portfolio Geographic Factors (VHA Obesity) (cont.)
Interactive Web-based Real-time Geo-Temporal Exploration of Obesity Data
(Showing averages of 2014 for MD)
Name OwnerVHA Corporate Data Warehouse VHAAmerican Community Survey CensusCensus 2010 CensusNational Health and Nutrition Examination Survey CDCFood Access Research Atlas + Others USDANational Vital Statisitcs Report CDCReference USA RefUSAOpen Street Map OpenMapModerate Resolution Imaging Spectroradiometer NASAConsumer Expenditure Survey BLSUniform Crime Reporting Statistics (FBI) FBIMaryland Food Systems MDUSDA Detailed Maps Baltimore USDAArcGIS Internal Datasets ESRISatellite data Google
© CPHIT @ JHSPH-HPM 45
Mid-Atlantic VISN – Multivariate GEE Analysis
high income and not married and high SES quartile remained increased odds of obesity, but Gagne morbidity scores were no longer associated with obesity
CPHIT Portfolio Geographic Factors (VHA Obesity) (cont.)
Variable Reference / Type OR p-value Increases Obesity
Age Continuous 0.97 <0.001 lower age
Race (white) Categorical (ref: non-white) 1.02 0.74 race = white
Income (< $25k) Categorical (ref: > $25k) 0.88 <0.05 income > $25k
Marriage (not-married) Categorical (ref: married) 0.77 <0.001 married
Service years Continuous 1.02 <0.001 more service year
SES Q2 Categorical (ref: Q1 lowest) 1.21 <0.05 higher SES quartile
SES Q3 Categorical (ref: Q1 lowest) 1.34 <0.001 higher SES quartile
SES Q4 Categorical (ref: Q1 lowest) 1.16 0.06 higher SES quartile
Gagne (> 0) Categorical (ref: <= 0) 0.94 0.16 Gagne < 0
Urban/Rural (rural) Categorical (ref: urban) 0.93 0.27 being urban
Road Density Continuous 0.91 0.44 lower road density
Low Food Access Continuous 1.06 0.19 higher low-food-access
© CPHIT @ JHSPH-HPM 46
Partnership between the Maryland Department of Health, Johns Hopkins (HPM/CPHIT) , Maryland Health Information Exchange (CRISP)
It is one of the top data linkage and modeling efforts of its type in the nation
Three-year grant (2015-2018) funded by US Department of Justice
Main aims:− To develop and validate a predictive risk model for overdose in the
Maryland Prescription Drug Monitoring Program (PDMP)− To extend this model to include predictors from other clinical and
criminal justice− To transfer these tools to the Md Department of Health and others for
use in addressing the opioid death epidemic
Predictive Risk Evaluation to Combat Overdose Grant (PRECOG)
© CPHIT @ JHSPH-HPM 47
© 2014, Johns Hopkins University. All rights reserved.
.
Data Sources, Risk Factors and Outcomes
Star indicates inclusion in Precog project as of 2/2018
© CPHIT @ JHSPH-HPM 48
No common identifier across siloed datasets. Unique identifiers stripped from datasets delivered to Hopkins and study ID appended.
CRISP used a probabilistic matching algorithm (the master patient index) to link person-level records from disparate systems using personal identifiers (e.g., name, DOB, SSN)
Created an integrated, de-identified statewide database (2014-2016)
Very Unique Linkage Process
© CPHIT @ JHSPH-HPM 49
© 2014, Johns Hopkins University. All rights reserved.
Key Model variables to predict opioid overdose death Using Only PDMP Database
© 2014, Johns Hopkins University. All rights reserved.© 2014, Johns Hopkins University. All rights reserved.
Opioid Overdose Death
Age OR 95% CI
Male 2.913 1.734 - 2.775
Method of Payment
Medicare 2.904 1.857 – 4.542
Opioid Use
Opioid use disorder fills, 1+ 7.021 4.249 – 11.603
Opioid short-acting, schedule II fills, 4+ 4.660 2.428 – 8.944
Other Controlled Substance
Muscle relaxant fills, 1+ 2.614 1.267 – 5.395
Reference categories: female, commercial payer, no OUD fill, no Short acting schedule 2 fill, no other CDS fills.
© CPHIT @ JHSPH-HPM 50
© 2014, Johns Hopkins University. All rights reserved.
Finding Model Performance in Identifying All Opioid Deaths Using only PDMP Data
• Sensitivity: 71.93• Specificity: 88.09• PPV: 0.72• NPV: 99.96
© 2014, Johns Hopkins University. All rights reserved.© 2014, Johns Hopkins University. All rights reserved.© 2014, Johns Hopkins University. All rights reserved.©2015, Johns Hopkins University. All rights reserved.©2018, Johns Hopkins University. All rights reserved.
© CPHIT @ JHSPH-HPM 51
Importance of Linking, PDMP, HSCRC and Corrections Data: Overdose fatality rates( per 100K) and OR) for subgroups defined by key items
1233 (OR: 25.2)
1174 (OR: 24.0)
765 (OR: 15.6)
730 (OR: 14.9)
708 (OR: 14.4)
661 (OR: 13.5)
634 (OR: 12.9)
559 (OR: 11.4)
483 (OR: 9.9)
413 (OR: 8.4)
362 (OR: 7.4)
342 (OR: 7.0)
283 (OR: 5.8)
201 (OR: 4.1)
188 (OR: 3.8)
141 (OR: 2.9)
125 (OR: 2.6)
99 (OR: 2.0)
99 (OR: 2.0)
83 (OR: 1.7)
63 (OR: 1.3)
49 (OR: 1.0)
0 200 400 600 800 1000 1200 1400
Inpatient Hospital Visit and Arrest (N=2,758)
Inpatient Hospital Visit and Parole (N=3,832)
Opioid Prescription and Parole (N=7,057)
ED Visit and Parole (N=10,549)
Inpatient Hospital Visit and Inmate (N=848)
Opioid Prescription and Arrest (N=4,992)
Arrest and Parole (N=3,941)
ED Visit and Arrest (N=8,057)
Parole (N=24,199)
Arrest (N=16,232)
Parole and Inmate (N=1,935)
ED Visit and Inmate (N=2,629)
Opioid Prescription and Inmate (N=1,413)
Inmate (N=9,954)
Inpatient and ED Visit (N=314,127)
Opioid Prescription and Inpatient Hospital Visit (N=366,348)
Opioid Prescription and ED Visit (N=610,572)
Inpatient Hospital Visit (N=810,284)
Arrest and Inmate (N=1,011)
ED Visit (N=1,551,240)
Opioid Prescription (N=1,740,332)
Maryland Average (N~=6,001,000)
© CPHIT @ JHSPH-HPM 52
CPHIT Portfolio Social Determinants of Health
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Framework to select variables representing various social determinants of health domains
Social Determinants of HealthSocial Factors
• Air Quality• Water Quality
Environmental Factors Lifestyle Factors
Natural Physical Built
• Access• Housing Issues
• Smoking and Alcohol Use
• Diet and Food Systems
Behavioral Psychological
• Sexual Attitude and Orientation
• Adult or Child Abuse
• Social Support and Isolation
• Social Service Access
Social-Environment Socio-Demographic
• Age and Gender• Race and Ethnicity• Language
• Education• Employment• Income and Financial
Resource Strain
Socio-Economic Socio-Cognitive
• Health Literacy• Self-Efficacy
© CPHIT @ JHSPH-HPM 53
CPHIT Portfolio Social Determinants of Health (Cont)
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Data Sources
Health Systems& Payers
• EHR structured / free-text• Claims and admin data
Non-Medical Organizations
& Agencies
• Community Agencies• Social/Human Services• Commercial Services
Consumer Generated
• Pat. Reported Out. / Survey• Social Media• Biometrics/ Consumer Data
Key Use Cases & Applications
Patient Care
• Clinical Decision Support
• Patient Support & Empowerment
Predictive Risk Modeling
Community Engagement
• Case Finding• Social Predictive
Modeling• Payment Adjust.
• Community Assessment
• Spatial-based Analysis
1st bucketPatient-levelInterventions
2nd bucketHealth System Interventions
3rd bucketCommunity-wide
Interventions
CDC Buckets of Prevention
Healthcare Stakeholders
Patients ProvidersClinicians
Health System(ACO)
PayersPlans
Agencies Policy
Makers
BETTERCARE
LOWER COST
IMPROVED HEALTH
Addressing SBDH in a healthcare system: data sources, applications, stakeholders, and outcomesCDC: Centers for Disease Control and Prevention; EHR: electronic health records; HIE: health information exchange; Pat: Patient.
© CPHIT @ JHSPH-HPM 54
CPHIT Portfolio Social Determinants of Health (Cont)
Various sources of data for SDH extracted or derived from an EHR
ICDLOINC
SNOMEDCustom
Lat.Lon.Various
types of notes
ICDLOINC
SNOMEDCustom
EHR data warehouseAncillary DBs
Surveys Diagnosis Free Text
Address Geo-derived SDH
individual-level accuracy
population-level completeness
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Discussion
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Discussion Challenges and Opportunities
• Data sources/types:
o How to compare data types and their added value o What are the limits of each data type? What are we missing?o What can be used from unstructured data?
• Data quality:
o Do objective measures have data quality issues (e.g., BMI)?o How can we measure the quality of subjective data?
• Denominator/Populations:
o Are we excluding noise or signal? o Is this a too big of a cut or too narrow – sample size issues?o Patient attribution issues.
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Discussion Challenges and Opportunities (cont.)
• Some Data Science / Analytic Issues
o “Feature” (aka variable Reduction” - How can we mix multiple approaches such as expert opinion + automated approaches to reduce the feature space?
o Longitudinal / Temporal Analysis - What window is appropriate? How to deal with large zero fills in temporal data?
• Privacy and Security:
o “Freeing “the Data while building in robust protectionso Is HIPAA and other regulation s from a past era ? Is it helping or
hurting future science?
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Discussion Collaboration Opportunities
Going Beyond Claims! New Data Sources
• EHRs • SDH (various sources)• Geo-derived Factors
Going Beyond Regression! New Methods
• Blending traditional HSR technique and “Machine Learning”• Temporal Data• Geo-analysis
Addressing Informatic / Data Sciences Issues
• Data Quality• Data Interoperability• Extracting New Data (e.g. NLP)
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Thank you!
Q & [email protected]@jhu.edu
www.jhsph.edu/cphitwww.hkharrazi.com