Figure 4. Comparison of CD80/CD163 cells proportion among monocyte subsets in older and younger CTR subjects. (A) proportion of CD80-CD163- and CD163+ cells among classical monocytes. (B-C) age-related correlation of CD80-CD163- and CD163+ classical monocytes. (D) proportion of CD80+ and CD163+ among non-classical monocytes. Young = 12 healthy subjects younger than 65 years. Old = 19 healthy subjects older than 65 years. Data are expressed as mean±SEM. *p<0.05.