Related Experiment Video
Updated: Aug 1, 2026
05:53
Measuring Frailty in HIV-infected Individuals. Identification of Frail Patients is the First Step to Amelioration and Reversal of Frailty
Published on: July 24, 2013
16.6K
Back Extensor Strength as a Potential Marker of Frailty Using Propensity Score Matching and Machine Learning
Taewook Kim1, Gowun Kim2,3,4, Hee-Won Park2,3,4
1Department of Education & Human Resources Development, Seoul National University Hospital, Seoul 03080, Republic of Korea.
Journal of Clinical Medicine
|October 14, 2023
Summary
Back extensor strength shows promise as a frailty marker. Stronger back muscles correlate with better physical function, suggesting it can help identify frailty in older adults.
Area of Science:
- Gerontology
- Musculoskeletal Health
- Biomedical Engineering
Background:
- Frailty is a significant geriatric syndrome associated with adverse health outcomes.
- Current frailty assessments can be time-consuming and require specialized equipment.
- Identifying accessible and reliable frailty markers is crucial for early intervention.
Purpose of the Study:
- To investigate back extensor strength as a potential alternative marker for frailty.
- To examine the association between back extensor strength and body composition.
- To evaluate the predictive capability of back extensor strength for frailty status.
Main Methods:
- Cross-sectional study of 560 farmers.
- Computed tomography (CT) scans for trunk muscle and fat composition analysis.
- Measurement of back extensor strength and Fried's frailty criteria.
- Statistical analyses including multivariate regression, propensity score matching, and XGBoost.
Main Results:
- Back extensor strength positively correlated with abdominal and back muscle volume (p < 0.05).
- Lower back extensor strength was associated with reduced grip strength, walking speed, and increased exhaustion.
- Multivariate logistic regression and XGBoost identified back extensor strength as a significant predictor of frailty.
Conclusions:
- Back extensor strength demonstrates potential as a practical and alternative marker for assessing frailty.
- This finding may facilitate simpler and more widespread frailty screening in clinical and research settings.
Related Concept Videos
01:22Design Consideration
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key aspect...
The factor of safety is another key aspect...
01:21Plastic Behavior
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and reloaded.
01:14Plastic Deformations
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
01:20Strain-Energy Density
Understanding the strain energy density in materials under axial load is crucial for evaluating their mechanical behavior and durability. When a rod is subjected to such a load, it elongates and stores energy, known as strain energy, as potential energy within the material. This energy is measured in terms of energy per unit volume.
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this region...
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this region...