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Non-linear associations of body mass index with impaired fasting glucose, β-cell dysfunction, and insulin resistance in nondiabetic Chinese individuals: a cross-sectional study
Affiliations- Department of Endocrinology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
- Department of Endocrinology, Fu Xing Hospital, Capital Medical University, Beijing, China
- Department of Endocrinology, Beijing First Hospital of Integrated Chinese and Western Medicine, Beijing, China
- The Physical Examination Centre, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
open access
Abstract
Introduction: Identifying and managing patients with prediabetes is important. The study aims to investigate the association of body mass index (BMI) with impaired fasting glucose (IFG), β-cell dysfunction, and insulin resistance in nondiabetic Chinese individuals.
Material and methods: This was a cross-sectional study of consecutive nondiabetic individuals enrolled between January 2014 and January 2015, divided into NFG [normal fasting glucose, fasting blood glucose (FBG) < 5.6 mmol/L) and IFG (n = 450; FBG ≥ 5.6 mmol/L) groups. Restricted cubic splines and piecewise-regression were used to model the association of IFG, impaired b-cell function, and insulin resistance with BMI. Stratified analyses were performed across sex and age.
Results: A total of 900 NFG and 450 IFG individuals were enrolled, with a median age of 41 (30–49) years and 1076 males (79.7%). After adjusting for age and sex, the restricted cubic splines showed that the risk of IFG was increasing rapidly until around 27.96 kg/m2 of BMI and then started to plateau afterward (p for non-linearity = 0.010), which was similar in males and individuals ≤ 45 years old (p for nonlinearity < 0.001 and = 0.007, respectively). The risk of insulin resistance increased and β-cell dysfunction decreased as the BMI increased in all participants (both p for non-linearity > 0.05), consistent with the results in males, females, and ≤ 45 and > 45 year olds.
Conclusions: The risk of IFG does not rise linearly as the BMI increases, and higher BMI seems to decelerate the rise of the risk.
Abstract
Introduction: Identifying and managing patients with prediabetes is important. The study aims to investigate the association of body mass index (BMI) with impaired fasting glucose (IFG), β-cell dysfunction, and insulin resistance in nondiabetic Chinese individuals.
Material and methods: This was a cross-sectional study of consecutive nondiabetic individuals enrolled between January 2014 and January 2015, divided into NFG [normal fasting glucose, fasting blood glucose (FBG) < 5.6 mmol/L) and IFG (n = 450; FBG ≥ 5.6 mmol/L) groups. Restricted cubic splines and piecewise-regression were used to model the association of IFG, impaired b-cell function, and insulin resistance with BMI. Stratified analyses were performed across sex and age.
Results: A total of 900 NFG and 450 IFG individuals were enrolled, with a median age of 41 (30–49) years and 1076 males (79.7%). After adjusting for age and sex, the restricted cubic splines showed that the risk of IFG was increasing rapidly until around 27.96 kg/m2 of BMI and then started to plateau afterward (p for non-linearity = 0.010), which was similar in males and individuals ≤ 45 years old (p for nonlinearity < 0.001 and = 0.007, respectively). The risk of insulin resistance increased and β-cell dysfunction decreased as the BMI increased in all participants (both p for non-linearity > 0.05), consistent with the results in males, females, and ≤ 45 and > 45 year olds.
Conclusions: The risk of IFG does not rise linearly as the BMI increases, and higher BMI seems to decelerate the rise of the risk.
Keywords
insulin-secreting cells; insulin resistance; blood glucose; body mass index
About this articleTitle
Non-linear associations of body mass index with impaired fasting glucose, β-cell dysfunction, and insulin resistance in nondiabetic Chinese individuals: a cross-sectional study
Journal
Issue
Article type
Original paper
Pages
618-624
Published online
2021-08-06
Page views
4651
Article views/downloads
295
DOI
10.5603/EP.a2021.0073
Pubmed
Bibliographic record
Endokrynol Pol 2021;72(6):618-624.
Keywords
insulin-secreting cells
insulin resistance
blood glucose
body mass index
Authors
Min Chen
Ruihua Yang
Ying Wang
Yumei Jia
Jia Liu
Guang Wang
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