[Effects of estimated glomerular filtration rate on all-cause mortality in the elderly aged 65 years and older in 8 longevity areas in China].

Objective: To investigate the association between estimated glomerular filtration rate (eGFR) and all-cause mortality in the elderly aged 65 years and older in longevity areas in China. Methods: Data used in this study were obtained from Healthy Aging and Biomarkers Cohort Study, a sub-cohort of the Chinese Longitudinal Healthy Longevity Survey, 1 802 elderly adults were collected in the study during 2012-2017/2018. In this study, the elderly were classified into 4 groups, moderate-to-severe group [<45 ml·min(-1)·(1.73 m(2))(-1)], mild-to-moderate group [45- ml·min(-1)·(1.73 m(2))(-1)], mild group [60- ml·min(-1)·(1.73 m(2))(-1)] and normal group [≥90 ml·min(-1)·(1.73 m(2))(-1)] according to their eGFR levels. Results: After 6 years of follow-up, 852 participants died, with a mortality rate of 47.3%. Multivariate Cox regression analysis showed that the levels of eGFR were negatively correlated with all-cause mortality risk in the elderly (the HR of elderly was 0.993 and the 95%CI was 0.989-0.997 for every unit of eGFR increased, P=0.001), while compared with the group with normal eGFR, the HRs (95%CI) of the elderly in the moderate-to-severe group, mild-to-moderate group, and mild group were 1.690 (1.224-2.332, P=0.001), 1.312 (0.978-1.758, P=0.070), 1.349 (1.047-1.737, P=0.020) respectively [trend test P<0.001]. Conclusion: The decrease in eGFR was associated with higher mortality risk among the elderly in longevity areas in China.目的： 探讨中国长寿地区≥65岁老年人估算肾小球滤过率（eGFR）与全因死亡率之间的关系。 方法： 数据来源于"中国老年健康影响因素跟踪调查"子队列—"老年健康生物标志物队列研究"，本研究共纳入2012年至2017/2018年的1 802名研究对象。根据eGFR水平将老年人分为4组：肾功能中-重度损伤组[<45 ml·min(-1)·（1.73 m(2)）(-1)]、肾功能轻-中度损伤组[45~ml·min(-1)·（1.73 m(2)）(-1)]、肾功能轻度损伤组[60~ml·min(-1)·（1.73 m(2)）(-1)]、肾功能正常组[≥90 ml·min(-1)·（1.73 m(2)）(-1)]。采用Cox比例风险模型评估eGFR水平与死亡风险之间的关联。 结果： 经6年随访共计852人死亡，死亡率为47.3%。多因素Cox回归分析结果显示，eGFR水平与老年人全因死亡风险呈负相关[eGFR水平每升高1 ml·min(-1)·（1.73 m(2)）(-1)，老年人死亡HR=0.993，95%CI：0.989~0.997，P=0.001]；相较于肾功能正常组，肾功能中-重度损伤组、轻-中度损伤组及轻度损伤组老年人死亡HR值（95%CI）分别为1.690（1.224~2.332，P=0.001）、1.312（0.978~1.758，P=0.070）、1.349（1.047~1.737，P=0.020）（趋势检验P<0.001）。 结论： eGFR下降与中国长寿地区老年人群的高死亡风险相关。.