Genetically Predicted Frailty Index Is Associated With Increased Risk of Multiple Metabolic Diseases: 175 226...

Area of Science:

• Genetics and Epidemiology
• Metabolic Health
• Aging Research

Background:

• Previous observational studies suggest a link between the frailty index (FI) and metabolic diseases (MDs).
• The causal relationship between frailty and metabolic diseases remains insufficiently understood.
• This research investigates the potential causal effect of the frailty index on the development of metabolic diseases.

Purpose of the Study:

• To establish a causal link between the frailty index (FI) and various metabolic diseases (MDs).
• To utilize Mendelian randomization to infer causality from observational data.
• To identify specific metabolic diseases influenced by frailty.

Main Methods:

• A bidirectional two-sample Mendelian randomization (MR) study design was employed.
• Genome-wide association study (GWAS) data for FI and summary statistics for eight MDs were utilized.
• Inverse variance weighted (IVW) analysis was the primary method, supported by sensitivity analyses including MR-PRESSO and MR-Egger.

Main Results:

• Elevated FI was found to be causally associated with increased risks of obesity, type 2 diabetes (T2DM), gout, hypothyroidism, and hypertension (HTN).
• Specific significant associations included obesity (OR=1.78), T2DM (OR=1.67), gout (OR=2.45), hypothyroidism (OR=1.96), and HTN (OR=2.17).
• No causal association was detected between FI and osteoporosis, vitamin D deficiency, or hyperthyroidism.

Conclusions:

• The study provides evidence supporting a causal relationship between the frailty index and multiple metabolic diseases.
• These findings are critical for developing targeted prevention strategies for metabolic diseases in frail individuals.
• Understanding this causal link can inform clinical practice and public health initiatives.