For the identification of small populations of cells (<5%) it is important to ensure that sufficient events are recorded to provide precision. A simple calculation, r = (100/CV) 2 where r is the number of events meeting the required criterion, can be used to determine that size of the database that will provide a given precision.
This calculation has been used to construct a table [PDF 44KB] which can be used as a guide in all cases of rare event analysis.
