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HD*Calc 2.0.0
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The Health Disparities Calculator (HD*Calc) is a statistical
software application which provides a convenient way to
compute several population based measures of health disparity.
Input data can be generated using SEER*Stat or can be imported
from any other source.

Absolute Disparity Measures
  -  Range Difference or Rate Difference (RD)
  -  Between-Group Variance (BGV)
  -  Absolute Concentration Index (ACI)
  -  Slope Index of Inequality (SII)

Relative Disparity Measures
  -  Range Ratio or Rate Ratio (RR)
  -  Index of Disparity (IDisp)
  -  Mean Log Deviation (MLD)
  -  Theil Index (T)
  -  Relative Concentration Index (RCI)
  -  Relative Index of Inequality (RII)
  -  Kunst Mackenbach Relative Index of Inequality (KMI)

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FEATURES
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  -  Easy to use interface
  -  Comprehensive help system
  -  Graphs and Tables for reporting results

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SYSTEM REQUIREMENTS
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  -  Pentium-based PC
  -  32-bit Microsoft Windows (95, 98, NT, 2000, XP, Vista, etc.)
  -  800 x 600 or greater monitor resolution
  -  Microsoft Internet Explorer 4.0+ for viewing help
  -  32 MBs application RAM
  -  Approximately 6 MBs disk space

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INSTALLATION
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To install using the installation program from the Internet:
  -  Download the installation program from
     https://seer.cancer.gov/hdcalc
  -  Within Windows, double-click on the downloaded file
  -  Follow the instructions on your screen

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REMOVING PREVIOUS INSTALLATIONS
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If you wish to completely remove an earlier version prior to
installing this current version, use the Add/Remove Programs icon in
the Windows Control Panel.

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REVISION HISTORY
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09/12/2019 - Version 2.0.0
  1.  Added ability to analyze input data containing individual
      records such as survey data.
  2.  Support calculation of disparity measures when there is
      only one time point.
  3.  Upgraded help to a web-based help system.

10/29/2013 - Version 1.2.4
  1.  Removed error message generated when loading data without
      population field.
  2.  Fixed reset of SE calculation method from Bootstrap to
      Taylor Series.

10/24/2012 - Version 1.2.3
  1.  Fixed the calculation of % change for Rate Ratio.
  2.  Added ability to adjust disparity measures for scaling
      when multiple measures are viewed together in a single chart.
  3.  Updated the sample data to use the most recent SEER*Stat
      databases.

6/25/2012 - Version 1.2.2
  1.  Modified the calculation of Kunst Mackenbach RII so that the
      disparity groups are handled in the correct order best-to-worst.

4/17/2012 - Version 1.2.1
  1.  Added ability to export disparity table in JoinPoint ready
      files.
  2.  Fixed data import utility to handle absence of stratification
      variable.
  3.  Fixed data retrieval to handle stratification of unsorted data. 

10/31/2011 - Version 1.2.0
  1.  Added ability to use more than one disparity variable.
  2.  User can specify variable types when loading SEER*Stat
      export files as input.
  3.  Fixed SII, RII and KMI to handle reverse order of disparity
      groups whne the "least advantaged group first" checkbox is
      unchecked. 

01/12/2010 - Version 1.1.0
      First production release. 

11/12/2009 - Version 1.0.6 - Beta
  1.  Fixed a problem with importing data (not from SEER*Stat) that 
      contained stratification variables.
  2.  Added a section to the help file for the pair comparison measures 
      (rate ratio and rate difference). And changed the order of the 
      reference and comparison groups on the Pair Comparison tab.  This 
      change was done for consistency between the rate ratio and range 
      ratio; and the rate difference and range difference.
  3.  Added support for comma delimited fields in the input data
      with the delimiter imbedded in quoted fields.
  4.  Added description of methods used for calculating Standard Errors
      and Confidence Intervals to the help system.
  5.  Corrected the URL in the "Help About" dialog
    
9/21/2009 - Version 1.0.5 - Beta (Initial public release)

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TECHNICAL SUPPORT
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Email: hdcalculator@imsweb.com

Web: seer.cancer.gov/hdcalc