Figure 2
Variation in T reg and T eff frequencies. A, The mean frequency from 7 readings of Tregs and Teffs over a period of 12 days was obtained for each of 10 cancer patients and 7 healthy donors. The ratio of Teff to Tregs was also calculated. B, The coefficients of variation in the frequencies of Tregs and Teffs as well as the ratio of Teffs to Tregs were determined by calculating the standard deviation among the 7 time points for each cancer patient and healthy donor and expressing it as a percentage of the mean frequency. Wilcoxon and Mann Whitney tests were used to determine significant differences between mean values, with p < 0.05 indicating significance. Graphs show mean ± standard error from the mean (SEM).