Association Between Relative Leg Length and Insulin Resistance in Rural, Urban and Rural-Urban Migrant Populations of...

Area of Science:

• Anthropometry and metabolic health research.
• Epidemiology of chronic diseases.
• Socioeconomic determinants of health.

Background:

• Insulin resistance is a key factor in metabolic disorders.
• Leg length, an indicator of early-life conditions, may influence adult metabolic health.
• Understanding variations across different population groups is crucial.

Purpose of the Study:

• To investigate the association between relative leg length and insulin resistance.
• To examine these associations across rural, urban, and migrant populations.
• To explore the mediating roles of obesity in this relationship.

Main Methods:

• Cross-sectional study using PERU MIGRANT data (2007-2008).
• Relative leg length categorized as short, normal, or long.
• Linear regression models adjusted for covariates; interaction and mediation analyses performed.

Main Results:

• A significant inverse association was found between longer relative leg length and lower insulin resistance.
• Long leg length was associated with a 43% lower insulin resistance.
• Significant interaction effects were noted in migrant and rural groups; excess body fat and abdominal obesity mediated the association.

Conclusions:

• Longer leg length is associated with reduced insulin resistance, particularly in rural-urban migrants.
• Findings suggest early-life nutritional and developmental factors impact adult metabolic health.
• Relative leg length may serve as a marker for metabolic disease risk potentially rooted in early development.