Figure 1. Effect of sex and age on the transcript expression levels of healthy controls' CD4⁺ T cells.

A. Women had higher levels of CD40LG than men. Data are presented as box plots, where the lines inside the boxes represent the medians, the boxes represent the 25^th and the 75^th percentiles, and the lines outside the boxes indicate the highest and lowest value. B, C. Inverse correlations between age and ITGAL (B) and age and KIR2DL4 (C) mRNA levels.