Associations between gender, age and waist circumference

Area of Science:

• Anthropometry
• Public Health
• Endocrinology

Background:

• Waist circumference (WC) is a key indicator of central obesity and metabolic risk.
• Understanding factors influencing WC, such as gender and age, is crucial for health assessments.
• Previous research indicates gender-specific differences in body composition and fat distribution.

Purpose of the Study:

• To examine the impact of gender and age on waist circumference (WC).
• To review associations between WC, body weight, body composition, and fat distribution with gender and age.
• To inform discussions on appropriate waist circumference cut-points for health screening.

Main Methods:

• Review of existing literature on gender, age, and waist circumference (WC).
• Analysis of factors influencing WC, including body composition, fat distribution, sex hormones, parity, and menopause.
• Summary of available data on gender, age, and WC relationships.

Main Results:

• Significant differences in body composition and fat distribution exist between genders, with women having more body fat and men a more central fat distribution.
• Waist circumference (WC) and waist-to-hip ratio increase with age in both men and women.
• Increases in WC with age are observed even without weight gain and are greater than predicted by Body Mass Index (BMI) changes alone.

Conclusions:

• The current practice of using separate waist circumference (WC) cut-points for men and women is appropriate.
• While WC increases with age, so does the risk of chronic diseases.
• Further evaluation is needed to determine the necessity of age-specific WC cut-points in adults, considering disease risk.