Although it is impossible to determine which shoots may be part of the same clone and which are different in the field without genetic characterization of each shoot, it is likely that shoot maturity and location of measurement on the shoots have more effect on physiological variables than genetic differences among clones.
Once again, this association was independent and more sensitive than other physiological variables, such as heart rate or blood pressure.
In addition, these scores are considerably more complex, requiring 17 physiological variables to be measured over the first 24 hours of critical care stay.
Adding active malignancy improved the discriminant value slightly (C statistic 0.81, 0.79 to 0.84), and adding physiological variables had a more marked effect (0.87, 0.85 to 0.89).
According to Osoba [ 42], there is a reasonably strong correlation between the proximal components of Wilson and Cleary's model (such as symptoms and physical function) and a weaker correlation between the more distant components (such as the physiological variables and subjective health status).
Several blood tests (usually two or more) were made daily to check if physiological variables remained stable in order to identify and correct causes of non-ischemic hypoxia [ 18].
A biomarker may include drug concentration but is more commonly used to refer to measurements of physiological variables such as blood pressure, serum cholesterol, electroencephalogram frequency, or pathological variables such as tumor size or disease severity.
This is all the more impressive given the inability of the commonly measured physiological variables (cardiac output and oxygen delivery excepted) to predict outcome.
Of course, more sophisticated and biologically realistic models would have to be studied to provide more specific, potentially quantitative, predictions regarding the effects of variation of particular physiological variables due to brain disease or other factors modulating brain function.
