Association between non-highdensity lipoprotein cholesterol to high-density lipoprotein cholesterol ratio and cardiovascular-kidney-metabolic syndrome: evidence from NHANES 2001–2018 - Duan, Yang; Yang, Ke; Zhang, Tianai; Guo, Xiangsheng; Yin, Qianran; Liu, He (Frontiers in Nutrition, 2025)