Glaucoma: Diagnosis and
Therapy
Coefficient of variation Hiroshi Ishikawa, M.D.
hiroishi@ix.netcom.com
Thank you for the very interesting poster, 'Accuracy of Orbital Color Doppler Flow Velocity Measurements in Glaucoma Patients'.
To my knowledge, reproducibility can be said good only when the coefficient of variation (CV) is less than 10%. Over 10%, reproducibility is not poor, but at the same time it is not good. I would say reproducibility is poor if CV is over 15%.
I saw many parameters showing CV more than 10% in your results, especially in minor vessels, and you stated that reproducibility is relatively good. If you have any reference supporting your statement, please let me know.
Did you detach and attach the probe while obtaining repeated images?
[ This message was edited on Mon Dec 7 by the author ]
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Mon Dec 7