percent increase from min calculates the percent increase from the minimum value to the current value. For example, given the following case fragment:
01 Jun 03 20 Jun 03 30 Jun 03 15 Oct 03 02 Nov 03 HDL 2.0 2.1 1.2 2.0 2.4 LDL 6.2 4.7 3.1 Trig 3.6 3.6 LipidDrug N Y Y
percent increase from min HDL is 100
percent increase from min LDL is 0
percent increase from min Trig where Trig is numeric is 0