is high evaluates as True if the value is above the high value of the reference range.

Similarly, is normal evaluates as True if the value is within the reference range.

Similarly, is low evaluates as True if the value is below the low value of the reference range.

For example, given the following case fragment,

Cholesterol    [<, 5.5]    7.3    5.6*   6.1*
Triglyceride   [0, 1.8]    0.8    1.1    1.8
HDL            [0.9, 3.5]         2.2    0.5*

Cholesterol is high

Triglyceride is normal

HDL is low

See also: contains only high (low, normal) values and is within … percent of normal.