Are all test results high?

Suppose that we are presented with this case:

                                 05 feb 03   23 oct 03   06 nov 03
	Cholesterol    [   < 5.5]                   5.6*        6.1*
	Triglyceride   [0.0, 1.8]       0.8         1.1         1.8
	HDL            [0.9, 3.5]                   2.2         0.5*

We note that each of the Cholesterol values that is given is above the upper reference value. To express this in a condition, we use the ‘are high’ syntax modified with a restriction clause: all Cholesterol are high, where Cholesterol is numeric

We could have used ‘is available’ in the restriction clause, but that is not quite as general. For example it will not be true if one of the samples is text, such as “pending”