老年人总胆固醇和死亡率:一个性别分层的队列研究
Maria Serena Iuorio1,2, Diana Lelli1, Stefania Bandinelli3
1Research Unit of Geriatrics, Fondazione Policlinico Universitario Campus Bio-Medico, Via Alvaro del Portillo, 200, 00128 Rome, Italy.
Nutrients
|October 16, 2025
概括
在老年人中,低总胆固醇 (TC) 可能表明健康问题,而不是降低风险. 这一发现对女性尤为重要,表明在老年人群中,TC水平需要仔细解释.
科学领域:
- 老年学是指老年学的学科.
- 心血管健康 心血管健康
- 流行病学 流行病学
背景情况:
- 总胆固醇 (TC) 与老年人死亡率之间的关联是复杂的,可能与年轻人不同.
- 高胆固醇血症是中年风险因素,但随着年龄的增长,这种联系可能会减弱或逆转.
- 与胆固醇代谢相关的性别特异性死亡风险尚未得到充分研究.
研究的目的:
- 为了检查总胆固醇 (TC) 和老年人全因死亡率之间的关联.
- 评估TC与死亡率关系中的性别特异性差异.
- 调查潜在的值效应和非线性关联.
主要方法:
- 使用了InCHIANTI研究 (N=999,年龄≥65) 的数据.
- 分类TC水平 (<200 mg/dL,200-239 mg/dL,≥240 mg/dL) 和评估6年所有原因死亡率.
- 采用卡普兰-梅尔曲线,考克斯模型和受限制的立方斜线,以多个共变量进行调整.
主要成果:
- 观察到一个值效应:死亡风险在~200 mg/dLTC以下增加,然后稳定下来.
- 中等和高TC水平 (<200 mg/dL参考值) 与较低的死亡风险相关 (HR分别为0.72和0.71).
- 这种模式在女性中比男性更为明显,并且在排除了他类药物使用者之后仍然存在.
结论:
- 老年人,特别是女性的低总胆固醇 (TC) 可能表明潜在的脆弱性,如营养不良或炎症.
- 在老年人中,TC与死亡率的关系呈现出J形曲线,低TC带来更高的风险.
- 性别分析对于了解胆固醇对老龄人口死亡率的影响至关重要.
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