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Influence of body mass index on the clinicopathological features of 13,995 papillary thyroid tumors

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Abstract

Purpose

This retrospective study aimed to assess the association between obesity, gender, and specific clinicopathological features in patients with papillary thyroid cancer (PTC) and whether diagnostic ultrasonography (US) is adversely affected by obesity in these patients.

Materials and methods

This study retrospectively analyzed 13,995 adult patients with PTC from a single medical center in China. Data stratification was performed to assess the association of obesity with US features and aggressive clinicopathological features in different models according to the World Health Organization Body Mass Index (WHO-BMI) and Chinese BMI classification (CN‐BMI). The odds ratio (OR) of malignant US features and aggressive clinicopathological features was calculated from binary logistic regression models.

Results

The BMI, obesity ratio, malignant US features, and aggressive pathological characteristics of males were significantly higher than those of females. After adjusting for confounding factors, the association of obesity with malignant US features and aggressive pathological characteristics was found to be sex-dependent. Next, obesity (WHO-BMI) was found to have an “interfering effect” on the US assessment of PTC (OR = 0.754, 95% CI 0.609–0.932, P = 0.009) in women. Among both sexes, obesity (WHO-BMI) increased the risk of tumor size (ORmale = 1.539 and ORfemale = 1.521) and multifocality (ORmale = 1.659 and ORfemale = 1.449). However, obesity did not increase the risk of capsular invasion or tumor staging in males. The above results are consistent with the CN-BMI. In addition, age was found to have an “interfering effect” on the US evaluation of malignant nodules in both sexes.

Conclusion

The results of our study confirm that higher BMI is significantly associated with aggressive clinicopathological features of PTC. Gender differences were present with obesity ratios and aggressive clinicopathological features being significantly higher in men.

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Authors and Affiliations

Authors

Contributions

Conception and design: HS, GD. Administrative support: Hui Sun. Collection and assembly of data: CL. Data analysis and interpretation: CL. Manuscript writing: CL, GD. Final approval of manuscript: All authors.

Corresponding author

Correspondence to H. Sun.

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Conflict of interest

The author claims that there is no conflict of interest.

Ethical approval

The study was approved by the Health Care Ethics Committee of the China-Japan Union Hospital of Jilin University (No.2019040806).

Informed consent

Written informed consent for participation was obtained from each study participant.

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Li, C.L., Dionigi, G., Zhao, Y.S. et al. Influence of body mass index on the clinicopathological features of 13,995 papillary thyroid tumors. J Endocrinol Invest 43, 1283–1299 (2020). https://doi.org/10.1007/s40618-020-01216-6

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  • DOI: https://doi.org/10.1007/s40618-020-01216-6

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