Table 1.

Summary of QPI drug response parameters.

Name	Abbreviation	Description	Units
Specific growth rate	SGR	Exponential growth constant, computed as the rate of change of cell mass over time, normalized by cell mass	h⁻¹
Half maximal effective concentration	EC₅₀	Therapy concentration at which cells exhibit 50% of maximum response	µM
Depth of response	DoR	Maximum difference in SGR between cells at minimum and maximum therapy concentrations, computed from Hill sigmoid curve fitting parameters	-
Time of response	ToR	The average time required to elicit a response to therapy at the tested concentration	h
Standard deviation of response	SD	Standard deviations of SGR at the tested concentration as a measure of cell-to-cell heterogeneity	h⁻¹