Figure 4. Pearson’s correlation analysis between estradiol and levels of various ceramide species in plasma from 84 women aged 20 to 78 years. (A) Ceramide (d18:1/24:1); (B) Ceramide (d18:1/24:0); (C) Ceramide (d18:1/16:0); (D) Ceramide (d18:1/18:0). Correlation is considered statistically significant at p < .05.