The association between the weight-adjusted waist circumference index (WWI) and thyroid function: an NHANES study

Area of Science:

• Endocrinology
• Public Health
• Obesity Research

Background:

• Obesity is a global health crisis affecting over a billion people.
• The weight-adjusted waist index (WWI) is a novel indicator of adiposity.
• The relationship between WWI and thyroid function remains understudied.

Purpose of the Study:

• To investigate the association between WWI and thyroid function in U.S. adults.
• To explore the correlation between WWI and various thyroid function indicators.
• To determine if WWI can serve as a predictor for thyroid function abnormalities.

Main Methods:

• Utilized data from 7,642 participants in the National Health and Nutrition Examination Survey (NHANES) (2007-2012).
• Employed weighted regression models (adjusted for multiple covariates) and stratified analyses.
• Validated findings in a separate cohort of 60 health check-up patients.

Main Results:

• A significant positive correlation was found between WWI and free triiodothyronine (FT3) levels.
• This association was consistent across WWI quartiles, except for one stratum.
• The positive WWI-FT3 association was more pronounced in males, younger individuals (<50 years), and those of other Hispanic ethnicity.
• Findings were replicated in an independent validation cohort.

Conclusions:

• The study suggests a positive association between WWI and FT3 levels.
• Further research is needed to confirm and elucidate this relationship.
• WWI may offer insights into thyroid function, particularly in specific demographic groups.