It is a ratio scale of measurement.
To make this a proper ratio, it is 1000:3
Examples are:a ratio can also show a part compared to the whole lot. For example there are 5 pups, 2 are boys and 3 are girls, then the ratio of boys to girls 2/3, the ratio of boys to total is 2/5, the ratio of girls to total is 3/5.a ratio can also be used in drawings. For example to draw a horse with a scale 1/10 from its normal size. Another example is that the height to width ratio of the Indian Flag is 2:3 or 2/3Another examples are:1/2, 3/4, 78/89, ... etcx/(x+1), y/(y-2), ... etc.
The year is interval scale (no natural zero); your age is ratio.
diferece between ratio and regression
Therapeutic range for aPTT is 45-75 seconds.
aPTT
1. INR (international normalised ratio) 2. aPTT
aptt is 100 seconds
hypercoagulatize state
Partial thromboplastin time test results can be obtained in less than one hour.
ratio of PT to normal
mision of the aptt
colarado,houstan aptt.211
As most coagulation factor proteins are produced in the liver, any disease of the liver will have an effect on the levels of coagulation factors, and in turn the patients' ability to form a clot. Therefore it is normal for a patient with liver problems to have a prolonged PT The in vitro test of PT tests for deficiencies of factors I, II, VII & X. If your aPTT was normal, the deficient factor will be VII, as deficiency in others would have had an effect on the aPTT too
0.3
http://wiki.answers.com/Q/What_is_the_normal_international_normal_ratio_when_taking_coumadin"