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Texas ILINet Structure and Operation 2002-2008. 86 th Annual Texas Public Health Association Conference April 21-23, 2010 South Padre Island, Texas Gary Heseltine MD MPH Infectious Disease Control Unit. Chronic Illnesses Demand Chronic Attention. Overview. What is ILINet

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Texas ilinet structure and operation 2002 2008

Texas ILINet Structure and Operation 2002-2008

86th Annual Texas Public Health Association Conference

April 21-23, 2010

South Padre Island, Texas

Gary Heseltine MD MPH

Infectious Disease Control Unit

Chronic Illnesses Demand Chronic Attention


Overview
Overview

  • What is ILINet

  • What is the structure of ILINet

    • Where does the data come from

    • Who is represented

  • How does ILINet operate

    • Data handling

    • Stability of operation

  • Possible Improvements to ILINet


Influenza like illness ili net
Influenza Like Illness (ILI) Net

  • CDC hosted syndromic reporting system

    • Fever > 100o F and cough or sore throat

  • Clinicians report weekly

    • Total number patient visits

    • Total number of patients diagnosed with ILI

      • Cases divided into 4 age strata

  • Statewide weekly ILI index

    • Combine data from all clinicians

      ILIindex= total ILI patients/total patient visits



Ilinet evolution
ILINet Evolution





8


Tuning Surveillance Levels

Weightcounty

Data Viewcounty

Weightblock

Data Viewblock


Ilinet data two issues
ILINet Data: Two Issues

  • ILINet data reported to the state does not reflect county populations

    • Weight county contributions to reflect underlying population proportion

    • Use sampling index to guide resource allocation and recruiting for ILINet to obtain proportionality

  • Sampling method itself: non-probability

    • Clinicians (reporters) are volunteers- bias

    • Convenience sample - bias

    • Use a probability sample to correct for ILINet sampling bias before submission to the state


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