Figure 3. Impact of dropouts on ssGSEA signature scoring.
(A) Percentages of up and down regulated gene signatures in original cells relative to down sampled cells for four levels of down sampling (20, 40, 60, and 80%) based on Cohen’s d. Dot size corresponds to the percentage of all signatures tested (n = 7503) in Head and Neck (Puram et al., 2017). (B) Effect of dropouts on ssGSEA scoring using a dummy expression matrix. The black line denotes the cell without any dropouts, and the blue line denotes the same cell with a 60% dropout rate. Note that for the gene signature, the first 99 genes are fixed. The x axis reflects the position of the last signature gene. When the gene is at rank <4000. The two cells give identical scores. However, after entering dropout zone, the scores start to deviate.