Fig. 1.

Low serum high-density lipoprotein cholesterol (HDL) and high serum triglycerides (TG)/HDL ratio are associated with increased risk of conversion to SSVD in patients with subjective or objective mild cognitive impairment. In terms of HDL, the lowest tertile was compared with the two higher tertiles, whereas for TG/HDL ratio, the highest tertile was compared with the two lower tertiles. Kaplan-Meier survival curves are presented for the risk of SSVD by (A) tertile of serum HDL concentration (log-rank test: p < 0.001 tertile 1 vs. tertiles 2–3) and (B) tertile of serum TG/HDL ratio (log-rank test: p < 0.01 tertile 3 vs. tertiles 1–2). Red, low HDL (tertile 1); blue, higher HDL (tertiles 2–3); green, high TG/HDL ratio (tertile 3); purple, lower TG/HDL ratio (tertiles 1–2).