Last updated 1st June 2004
1. Where can I get a quick guide to the HOMA model?
The "Use and Abuse of HOMA modeling" paper [Wallace TM, Levy JC, Matthews DR. Diabetes Care (2004); 27(6): 1487-95] addresses most HOMA issues. Additional HOMA related papers are listed in publications.
2. What input values will the HOMA Calculator accept?
As HOMA is a steady state model, only clinically realistic values that would be seen in a fasting subject should be used. These are:
- Plasma glucose 3.5 to 25.0 mmol/L
- Plasma insulin 20 to 400 pmol/L
- Plasma specific insulin 20 to 300 pmol/L
- Plasma C-peptide 0.2 to 3.5 nmol/L
3. Why does the Excel version give errors for some input values?
Outside the accepted range (see Q2) calculation is often impossible. The Excel version gives an answer wherever possible but answers outside the accepted input range should be treated with caution.
4. I'm getting an error 'Run Time Error "13", Type Mismatch'?
This problem is resolved in version 2.2 and above. Please download the latest version.
5. I am having problems downloading the HOMA Calculator
There are known IE problems associated with some web browsers. You can overcome these by following the instructions given below:
1) Go to our website http://www.dtu.ox.ac.uk/homa/download.php
2) Right click and let go on the 'Windows' link under the ‘Download the HOMA Calculator’ heading.
3) Select 'Save target as...' from the menu that pops up.
4) Select a location for the file- use desktop for now to keep things simple – and save.
5) Close Internet Explorer and all other applications.
6) There should be an Icon on the desktop called ' HOMA2CalculatorSetup.exe'.
7) Double click this icon.
6. I have downloaded and installed the HOMA Calculator but it will not work.
You must ensure that you have administrator rights on your computer. Please query this with your IT department. Typically you may see the following messages
- -2147024770 automation error
- Code: 429 active X component can’t create object
- Setup fatal error: unable to generate installation log file
OCDEM, Churchill Hospital, Old Road, Headington, Oxford, OX3 7LJ
Tel: +44 (0)1865 857233 Fax: +44 (0)1865 857235 Email: homa.calculator@dtu.ox.ac.uk
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