目的   血清同型半胱氨酸（Hcy）水平与慢性肾脏病（CKD）的进展相关，但中年人群的非线性关联研究较少，本研究旨在寻找慢性肾脏病危险因素。方法   本研究基于NHANES 1996—2006年数据，纳入5 361例45~65岁参与者，以估算肾小球滤过率（eGFR）＜60 mL/（min·1.73 m² ）和尿白蛋白/肌酐比值（uACR）≥30 mg/g评估肾功能下降。结果   通过逻辑回归及平滑曲线拟合分析发现，Hcy每升高1 µmol/L，eGFR降低的风险增加8%（OR=1.08，95%CI：1.06~1.10），uACR升高的风险增加2%（OR=1.02，95%CI：1.00~1.04）。非线性分析显示，Hcy对eGFR的阈值效应拐点为13.4 µmol/L（拐点左侧OR=1.59，95%CI：1.49~1.70；右侧无显著关联）。亚组分析表明，性别、高血压、糖尿病等协变量无交互作用，然而，在敏感性分析中，糖尿病患者中Hcy与eGFR降低的关联更强（交互P=0.015 8）。结论   本研究提示，控制Hcy水平或可延缓美国中年人群（尤其是糖尿病患者）的肾功能衰退。

        Objective   Elevated serum homocysteine（Hcy）levels are linked to chronic kidney disease（CKD）progression，yet the nonlinear relationship in middle-aged populations remains underexplored．Methods  This  study analyzed data from 5 361 participants aged 45–65 years in the NHANES 1996–2006 cohort．Renal dysfunction was defined as an estimated glomerular filtration rate（eGFR）＜60 mL/min/1.73 m²  and urinary albumin-to-creatinine ratio（uACR）≥30 mg/g．Results  Logistic regression and smoothed curve fitting revealed that each 1 µmol/L increase in Hcy elevated the risk of reduced eGFR by 8%（OR=1.08，95% CI：1.06–1.10）and uACR by 2%（OR=1.02，95% CI：1.00–1.04）．A nonlinear threshold effect was identified at 13.4 µmol/L，with a stronger association below this threshold（OR=1.59，95% CI：1.49–1.70）and no significant effect above it．Subgroup analyses showed no interactions with gender or hypertension，but a stronger Hcy-eGFR association was observed in diabetics（interaction P=0.0158）．Conclusions  These findings suggest that controlling Hcy levels may mitigate renal decline，particularly in diabetic populations，warranting further causal investigations．

      近视是一种常见的屈光不正状态，也是全球范围内普遍存在的视觉健康问题，其特征是在眼部调节放松的状态下，平行光线经眼的屈光系统折射后聚焦在视网膜前，导致视远模糊。近视通常在儿童期发生和发展，但在成年期仍可继续发生和发展。本综述对已发表的关于成年人近视发生和进展的文献进行总结，描述成年人近视的流行病学特征，包括近视率、近视发病率、近视进展率及其近视特征（屈光度及眼轴），总结成年人近视发病和进展的危险因素。了解成年人近视的发展特点和管理方式对于近视防控实践具有重要意义。

   Myopia is a common refractive error and a universal visual health problem in the world. It is characterized by the fact that parallel light rays refract through the refractive system of the eye and focus in front of the retina when the eye accommodatior is relaxed, resulting in distant blurred vision. Myopia usually occurs and develops in childhood, but can continue to occur and develop in adulthood. This review summarizes the published literature on the occurrence and progression of myopia in adults, describes the epidemiological characteristics of myopia in adults, including myopia rate, myopia incidence rate, myopia progression rate, and myopia characteristics（diopter and ocular axis） ; and summarizes the  risk factors for the occurrence and progression of myopia in adults. Understanding the developmental characteristics and management methods of adult myopia is of great significance for myopia prevention and control practice.