INS and Insulin resistance: Fasting plasma insulin (10.6 ± 7.1 vs. 13.7 ± 17.8 μIU/mL, p = 0.021) and homeostatic model assessment of insulin resistance (HOMA-IR) index (2.6 ± 1.8 vs. 3.4 ± 5.6, p = 0.039) were significantly lower in the low BDNF group than in the high BDNF group.