比较节奏与基于机器学习的身体活动强度分类:身体活动与死亡率的关联变化
Le Wei1,2, Matthew N Ahmadi1,2, Raaj Kishore Biswas1,2
1Mackenzie Wearables Research Hub, Charles Perkins Centre, The University of Sydney, Sydney, Australia.
Scandinavian journal of medicine & science in sports
|September 10, 2024
概括
机器学习 (ML) 和基于节奏的方法准确地分类体力活动 (PA) 强度. ML方法显示,所有原因和心血管疾病死亡风险的最大降低,这表明它们在观察性研究中的有用性.
科学领域:
- 运动生理学 运动生理学
- 生物医学数据科学 生物医学数据科学
- 流行病学 流行病学
背景情况:
- 步骤节奏和机器学习 (ML) 用于健康研究中的体力活动 (PA) 强度分类.
- 准确的PA强度评估对于了解其对死亡率的影响至关重要.
研究的目的:
- 用基于节奏和ML方法比较强度特定的PA持续时间与所有原因 (ACM) 和心血管疾病 (CVD) 死亡率的关联.
- 在大型观测研究中评估不同PA强度分类方法的有效性.
主要方法:
- 利用了来自68,561名英国生物库参与者的数据,他们戴着手腕加速度计.
- 在活动类型和强度分类方面采用了两阶段的ML方法.
- 应用一级 (1LC) 和两级 (2LC) 基于节奏的方法,使用适度和强烈强度PA的已确定的步骤/分钟值.
主要成果:
- 2LC方法在ACM较低的PA持续时间显示了最强的关联.
- 在所有强度级别中,ML方法证明了最大的死亡风险降低.
- 标准化分析显示,ML方法对中度PA和心血管疾病死亡率产生了最明显的关联.
结论:
- 不同的PA强度分类方法给出了与死亡结果的不同关联.
- 在观察性研究中,ML方法似乎最有效地估计了中度和强烈的PA对健康的益处.
- 准确的PA强度评估是公共卫生建议和干预措施的关键.
相关概念视频
01:25Correlation between ECG and Cardiac Cycle
3.6K
The electrical signals recorded on an electrocardiogram (ECG) occur before the mechanical processes of contraction and relaxation during the cardiac cycle.
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
A cardiac action potential originates in the SA node and spreads throughout the atria and the AV node in approximately 0.03 seconds. This results in the P wave in an ECG and triggers atrial contraction. The action potential is then briefly slowed at the AV node, allowing the atria to contract and fill the ventricles with blood before...
3.6K
01:30Factors Influencing Heart Rate
2.5K
The heart rate, or pulse rate, is a vital indicator of cardiovascular health. It reflects the number of times the heart beats per minute. Various physiological and environmental factors influence heart rate, increasing or decreasing cardiac output. Understanding these factors is crucial for assessing heart function and identifying potential health issues.
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
Let us explore the significant factors affecting heart rate, including age, body temperature, posture, acute pain, chemical influences,...
2.5K
01:10Pre-Procedural Guidelines for Assessing Blood Pressure
525
Accurate blood pressure assessment is crucial for diagnosing and managing various health conditions. To ensure the reliability of these measurements, healthcare professionals must adhere to standardized pre-procedural guidelines. These guidelines enhance patient safety and improve the overall quality of healthcare. The following steps are essential for obtaining accurate and consistent blood pressure readings, from using the appropriate tools to ensuring effective communication with the...
525
01:20Comparing the Survival Analysis of Two or More Groups
162
Survival analysis is a cornerstone of medical research, used to evaluate the time until an event of interest occurs, such as death, disease recurrence, or recovery. Unlike standard statistical methods, survival analysis is particularly adept at handling censored data—instances where the event has not occurred for some participants by the end of the study or remains unobserved. To address these unique challenges, specialized techniques like the Kaplan-Meier estimator, log-rank test, and...
162