Impact of hematocrit (1%, 2%, or 4%) on cellular response after UVA irradiation (2 J/cm²).

(A) Percentage of Annexin-V+ cells measured daily up to 2 days after irradiation. (B) Δapoptosis determined on days 1 and 2 post-irradiation. (C) Fold increase on day 3 post-irradiation relative to day 0. (D) Proliferation inhibition percentage, calculated as the percentage decrease in proliferation in irradiated versus control samples. For clarity, only statistically significant results are shown. *p<0.05; **p<0.01; ***p<0.001. Significant differences with respect to the control (UVA-) are indicated with an asterisk above the relevant bar, while comparisons between irradiated samples are indicated with an asterisk over a line linking the relevant bars. For Annexin-V+ cells (A) and Δapoptosis (B), comparisons performed on days 1 and 2 post-irradiation are indicated in black and gray, respectively.