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Comparative Study
. 2024:46:e2024066.
doi: 10.4178/epih.e2024066. Epub 2024 Jul 17.

Comparative analysis of body mass index and obesity-related anthropometric indices for mortality prediction: a study of the Namwon and Dong-gu cohort in Korea

Ye Rim Kim  1 , Min-Ho Shin  2 , Young-Hoon Lee  3 , Seong-Woo Choi  4 , Hae-Sung Nam  5 , Jeong-Ho Yang  2 , Sun-Seog Kweon  2   6
Affiliations
Comparative Study

Comparative analysis of body mass index and obesity-related anthropometric indices for mortality prediction: a study of the Namwon and Dong-gu cohort in Korea

Ye Rim Kim et al. Epidemiol Health. 2024.

Abstract

Objectives: This study investigated the associations between several obesity-related anthropometric indices and mortality in middle-aged and elderly populations to compare the indices' predictive ability with that of the body mass index (BMI).

Methods: We analyzed data on 12 indices calculated from 19,805 community-based cohort participants (average age, 63.27 years; median follow-up, 13.49 years). Each index was calculated using directly measured values of height, weight, waist circumference (WC), and hip circumference (HC). We calculated hazard ratios (HRs) and 95% confidence intervals (CIs) for each index using Cox regression and evaluated mortality prediction with the Harrell concordance index (c-index).

Results: Adding anthropometric indices to the basic mortality model (c-index, 0.7723; 95% CI, 0.7647 to 0.7799) significantly increased the predictive power of BMI (c-index, 0.7735; 95% CI, 0.7659 to 0.7811), a body shape index (ABSI; c-index, 0.7735; 95% CI, 0.7659 to 0.7810), weight-adjusted waist index (WWI; c-index, 0.7731; 95% CI, 0.7656 to 0.7807), and waist to hip index (WHI; c-index, 0.7733; 95% CI, 0.7657 to 0.7809). The differences between the BMI model and the other 3 models were not statistically significant.

Conclusions: In predicting all-cause mortality, the ABSI, WWI, and WHI models based on WC or HC had stronger predictive power than conventional risk factors but were not significantly different from the BMI model.

Keywords: Mortality; Obesity; Weights and measures.

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Conflict of interest statement

Conflict of interest

The authors have no conflicts of interest to declare for this study.

Figures

Figure 1.
Figure 1.
All-cause mortality HRs and 95% CIs for anthropometric indices. (A) Body mass index (BMI), (B) a body shape index (ABSI), (C) abdominal volume index (AVI), (D) body roundness index (BRI), (E) conicity index (ConI), (F) estimated total body fat (eTBF), (G) relative fat mass (RFM), (H) hip index (HI), (I) waist to hip ratio (WHR), (J) waist to height ratio (WHtR), (K) weight-adjusted waist index (WWI), and (L) waist to hip index (WHI). HR, hazard ratio; CI, confidence interval; SD, standard deviation. *p for non-linear test <0.05.
None
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