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Published in: European Journal of Medical Research 1/2023

Open Access 01-12-2023 | Obesity | Research

The association of body mass index and weight waist adjustment index with serum ferritin in a national study of US adults

Authors: Hao Han, Ping Ni, Siqi Zhang, Xiaojuan Ji, Mingli Zhu, Wanyu Ma, Hongfeng Ge, Hailiang Chu

Published in: European Journal of Medical Research | Issue 1/2023

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Abstract

Background

Abnormal serum ferritin levels are associated with a variety of diseases. Meanwhile, abnormal serum ferritin is influenced by a variety of risk factors, but its correlation with obesity remains poorly described.

Objective

This study aimed to investigate the association of body mass index (BMI) and weight waist adjustment index (WWI) with serum ferritin in US adults.

Methods

Participants in this study took part in the National Health and Nutrition Examination Survey (NHANES) prior to the pandemic from 2017 to March 2020. Serum ferritin was used as the sole response variable and BMI and WWI were used as independent variables. Multiple linear regression was used to assess the relationship between serum ferritin and the independent variables, and smoothed curve fitting and threshold effects analysis were performed to assess the presence of non-linear relationships. To validate the sensitive individuals for the correlation between the independent and the dependent variables, a subgroup analysis was performed.

Results

A final total of 7552 participants were included in this study. Both independent variables had a positive relationship with serum ferritin, with effect values of (β = 0.68, 95% CI: 0.17–1.19) when BMI was the independent variable and (β = 8.62, 95% CI: 3.53–13.72) when WWI was the independent variable in the fully adjusted model. This positive association between the two obesity-related indexes and serum ferritin became more significant as BMI and WWI increased (P for trend < 0.001). In subgroup analyses, the positive association between the independent variables and serum ferritin was more pronounced in participants who were male, 40–59 years old, white, and had diabetes and hypertension. In addition, smoothed curve fitting and threshold effects analysis demonstrated a linear positive association of BMI and WWI with serum ferritin.

Conclusions

In the US adult population, while there was a linear positive association of WWI and BMI with serum ferritin, the effect values between WWI and serum ferritin were more significant. Male, 40–59 years old, white, participants with diabetes and hypertension should be cautious that higher WWI might entail a risk of higher serum ferritin levels.
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Literature
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go back to reference Ueno Y, Fujita K, Takashina N, Chiba S, Uzuka Y, Kinouchi T, et al. Studies on the change in the levels of serum ferritin, serum iron and total iron binding capacity caused by aging and sex difference. Rinsho Byori. 1991;39:523–30.PubMed Ueno Y, Fujita K, Takashina N, Chiba S, Uzuka Y, Kinouchi T, et al. Studies on the change in the levels of serum ferritin, serum iron and total iron binding capacity caused by aging and sex difference. Rinsho Byori. 1991;39:523–30.PubMed
Metadata
Title
The association of body mass index and weight waist adjustment index with serum ferritin in a national study of US adults
Authors
Hao Han
Ping Ni
Siqi Zhang
Xiaojuan Ji
Mingli Zhu
Wanyu Ma
Hongfeng Ge
Hailiang Chu
Publication date
01-12-2023
Publisher
BioMed Central
Keywords
Obesity
Obesity
Published in
European Journal of Medical Research / Issue 1/2023
Electronic ISSN: 2047-783X
DOI
https://doi.org/10.1186/s40001-023-01343-9

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