?

Jiajia Zhang1, Jie Hu1, Yinyan Gao1

  • 1Xiangya School of Public health, Central South University, Changsha, Hunan, China.

基于常规临床指标的衰老时钟已成为评估生物年龄的一种经济有效的工具。本系统综述旨在总结此类衰老时钟的特征并对其进行批判性评价。通过检索截至2024年6月18日的六个数据库(PubMed、EMBASE、Web of Science、CNKI、万方数据和Sinomed),纳入了基于常规临床指标为成年人(≥18岁)开发衰老时钟的研究。采用PROBAST+AI工具评估所纳入衰老时钟的方法学质量、偏倚风险及适用性。所有结果均以叙述方式总结。共纳入59项研究,涉及81个衰老时钟,其中71个(87.7%)使用单一国家的数据集开发,主要来自中国、美国、韩国和英国。值得注意的是,有31个衰老时钟(38.3%)在开发过程中未进行内部或外部验证。大多数衰老时钟在质量方面被评为关注程度高,且存在高偏倚风险,其中包括发表在高影响力期刊上的时钟。仅有两项研究中的3个衰老时钟(3.7%)在开发阶段被评为质量和适用性方面关注程度低,且其中一项研究的2个时钟(4.0%)在模型评估阶段进一步显示偏倚风险低、适用性关注程度低。未来的研究应优先考虑在目标人群中验证有前景的衰老时钟,而非开发新的时钟;应遵循PROBAST+AI和TRIPOD+AI指南,以确保方法学严谨性和报告透明度;并应提供可重复且用户友好的模型代码和工具。

相关概念视频

The Sense of Self: Reflected Self-Appraisal and Social Comparison02:57

The Sense of Self: Reflected Self-Appraisal and Social Comparison

According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
56.2K
Indicators02:39

Indicators

Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
61.1K
Cardiovascular Drugs: Classification based on Therapeutic Indications01:18

Cardiovascular Drugs: Classification based on Therapeutic Indications

Cardiovascular diseases, encompassing a range of conditions, can significantly affect the heart's operations and the overall circulatory system. These conditions impair the heart's ability to pump blood, leading to a deficit in oxygen supply to crucial organs. Anomalies in the heart's electrical system, known as arrhythmias, can cause heartbeats to accelerate or slow down. Usually, heart rates increase during physical activity and decrease while resting or sleeping. However,...
4.3K
Lazarus's Cognitive Appraisal Theory01:20

Lazarus's Cognitive Appraisal Theory

Cognitive psychologist Richard Lazarus proposed the cognitive-mediational theory of emotions, which emphasizes how individuals' assessments of stressors significantly affect their experience of stress. According to Lazarus, the stress response is determined by a two-step appraisal process: primary appraisal and secondary appraisal. These cognitive appraisals help individuals evaluate the potential impact of a stressor and determine the adequacy of their coping resources.
Primary Appraisal:...
2.0K
Clinical Applications of Epidermal Stem Cells01:19

Clinical Applications of Epidermal Stem Cells

Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own...
3.3K
Review and Preview01:10

Review and Preview

In statistics, several tools are used to interpret the data. Measures of central tendency represent the characteristics of the data, such as mean, median, and mode. Additionally, measures of variance like standard deviation and range are used to find the spread of data from the mean. Relative standing measures the distance between data locations. Commonly used measures of relative standings are percentile, z score, and quartiles.
Percentiles are a type of fractile that partition data into...
8.4K