Results:
If the G:I ratio is less than 4.5, horse is severely IR. If the G:I ratio is between 4.5 and 10, the horse is compensated IR. A G:I ratio greater than 10 is normal.
G:I ratio =
A RISQI greater than .32 is normal. A RISQI less than .32 indicates IR. A RISQI less than .22 indicates severe IR.
RISQI =
Some horses will have a normal G:I ratio and RISQI but still be in danger if the glucose is over 100. An MIRG greater than 5.6 will indicate IR in these cases.
MIRG =
IR Status =
Reference:
1.Treiber. et al. (AJVR. Vol66. No. 12. December 2005 : 2114-2121)
2.Treiber. et al. (JAVMA, Vol 228, No. 10, May 15, 2006 : 1538-1545)
3.Eleanor Kellon, VMD, Equine Cushings Group