BDNF and sarcopenia: Plasma BDNF concentration >1645 pg/ml was associated with 2.83 greater odds for sarcopenia (95%CI = 1.13-7.11, P = 0.027), than ≤1645 pg/ml, whilst a BDNF Z-score ≥2 was associated with 5.14 higher odds for sarcopenia (95%CI = 1.16-22.82, P = 0.031), than a Z-score <1.