Acknowledgements
Download
1 / 17

Acknowledgements - PowerPoint PPT Presentation


  • 50 Views
  • Uploaded on

Acknowledgements. Epidemiologic Query & Mapping System. Sherrilynn Fuller Principal Investigator. Public Health System Linkages – Bench to Bedside and Beyond. Richard Hoskins Cathy O’Connor. Clark Johnson. Patrick O’Carroll. EpiQMS URL. http://198.187.0.45/EpiQMS/.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Acknowledgements' - caia


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Acknowledgements
Acknowledgements

Epidemiologic Query & Mapping System

Sherrilynn FullerPrincipal Investigator

Public Health System Linkages – Bench to Bedside and Beyond

Richard Hoskins

Cathy O’Connor

Clark Johnson

Patrick O’Carroll


Epiqms url
EpiQMS URL

http://198.187.0.45/EpiQMS/

Also EPIQMS in www.google.com


Components
Components

Components

  • WWW based - high speed access by local health

  • Three user levels (public, practitioner, need-to-know)

  • Rates with statistical measures

  • Charts & graphs, time trends

  • Deals with small numbers (empirical Bayes spatial modeling)

  • Static, dynamic and full GIS mapping

  • Multiple geographies

  • Queries a dynamic database (no or little on-line calculation)

  • Allows central Q&A (software & data & statistical measures)

  • Comprehensive security model

  • Individual id protection (available dimensions)

  • Only aggregated data

  • Tutorials


Datasets for epiqms

ABORTIONS 1991-1999BIRTHS CERTIFICATE 1980-1999CANCER Registry

CENSUS DATA  1980 1990 – 1998 2000

(state, county, census tract, legislative district, school district, Zip Code, SES cluster zones, climate zones, rural areas)  COMMUNICABLE DISEASE 1980-1997DEATHS 1980-2000 ICD9 – ICD10

HOSPITALIZATIONS 1990 -1999HOSPITALIZATIONS (EPI FILE) 1990-1999 INFANT DEATHS 1981-1999STD 1993-1999 TUBERCULOSIS 1992-1999

HIV 1992 – 1999

Health of Washington State

Youth Violence

Crime , housing

Datasets for EpiQMS

Available now

In preparation

Requested


Why do this
Why do this?

  • Original and still primary objective: Communicable disease tracking

  • Geographically oriented (maps)

  • Small numbers

  • Ease of use and access

  • Low cost for users


Objectives
Objectives

  • Ease of access to public health data by all citizens while paying strict attention to individual privacy.

  • Allow medical practitioners routine access to support assessment and surveillance in local health departments, communities, WA DOH, and public health research.

  • Get people who use public health data to think geographically. Many geographies, some non-standard.

  • Uniformity of epidemiologic measures.

  • Offer on-line instruction in how to use and intrepret public health data.

  • Software burden is on DOH not users.

  • Allow down loading ofinformation– tables, charts, maps.


Diagram
Diagram

How it works …

DOH databases

Population data

Web server

Geocoded data

Dynamic mappingengine

SASpreprosessing

Data formating

PreProcessing

SAS

Full GIS

DOH:Secure Data Server

No identifiers !

Static Maps

EpiQMS Internet Engine

EpiQMS database

Aggregated data

SQL server

EpiQMS: Data Server

WWW users

need-to-know

citizen users

practitioners


Indexing primary key
Indexing - primary key

Aggregating events by:

Disease

Geography

Year

Age

Yes

Race

Yes

No

Sex

Yes

No

No

Generates Index:

15

X

O

X

O

O

15XOXOO

Breast cancer




Who decides which users get various levels of access
Who decides which users get various levels of access?

  • Data “owners”

  • Not EpiQMS team

  • Tools to help data owners decide:

  • Probability studies

  • Count suppression


Map

Beginningto think geographically ...

Thematic Maps

Trivial pursuit

word: choropleth


Map

Issues in thematic mapping

Natural break

Equal ranges

Equal counts

Different conclusionscan be drawn from maps of thesame data.


MAUP

The Modifiable ArealUnit Problem (MAUP)

A form of ecological fallacy associated with the aggregation of data into areal units for geographical analysis.

There are two effects:

Scale effect: The larger the unit of aggregation, the larger, on average, is the correlation between two variables.

Aggregation effect: By aggregating data into different blocks, you can get different correlations. 1960 election:

+0.44 correlation between rural non-farm voting for Nixon in using Census nine-region division -0. 22 correlation using the Census four-region division.


Empirical bayes estimation
Empirical Bayes estimation

How to estimate disease rates in “small” areas?

  • previous data

  • intuition

  • good guess (or even a bad one)

  • the data itself - Empirical Bayes

  • Smoothing to reflect confidence of local estimation of risk

  • Prior knowledge of about rates and the observed data are used to develop a priordistribution

posterior likelihood prior

distribution of datadistribution

Mean (smoothed rates)

std error (Bayesian confidence intervals)


Map

Breast Cancer

Bayesian Rate Ratio

0.00 to 0.75

0.75 to 1.25

1.25 to 2.25

2.25 to 12.00

Other

0

30

60

90

Miles

Deaths from breast cancer in age 35-44 women

No Bayes

Blank areas indicate no deaths

Bayes

Zipcodes


What does it take to run epiqms
What does it take to run EpiQMS?

Fast!

User

  • Internet Explorer

  • Internet connection 56k or >

  • Two plug-ins which are easy to deal with. (SVG for maps, ChartFX for charts)

DOH

  • SQL server

  • ChartFX – charting software

  • SAS for the prep of data

  • Visual Interdev – standard Internet site development tool.

  • RoboHelp – help system development package

http://198.187.0.45/EpiQMS/


ad