Associations between modifiable risk factors and frailty: a Mendelian randomisation study

Area of Science:

• Gerontology
• Genetics
• Epidemiology

Background:

• Frailty is a significant geriatric condition.
• Early identification of modifiable risk factors is crucial for prevention.
• Understanding genetic predispositions can inform preventative strategies.

Purpose of the Study:

• To investigate causal relationships between genetically predicted risk factors and frailty.
• To identify key modifiable factors contributing to frailty risk.

Main Methods:

• Employed univariable and multivariable Mendelian randomization (MR) analyses.
• Utilized summary genome-wide association statistics for 22 potential risk factors.
• Assessed frailty using the frailty index.

Main Results:

• Significant causal associations found between frailty and genetic liability to coronary artery disease (CAD), type 2 diabetes mellitus (T2DM), ischemic stroke, atrial fibrillation, smoking, increased BMI, blood pressure, LDL cholesterol, triglycerides, alcohol intake, and sleeplessness.
• Inverse associations observed for genetically predicted higher education and HDL cholesterol.
• No significant causal links identified for coffee/tea consumption, hormone levels, vitamin D, CRP, or physical activity.

Conclusions:

• Provided genetic evidence for causal links between several modifiable risk factors and lifetime frailty risk.
• Suggests a multidimensional approach targeting identified factors for frailty prevention.