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Secular trends in the incidence of eating disorders in China from 1990 to 2017: a joinpoint and age–period–cohort analysis

Published online by Cambridge University Press:  03 August 2020

Jiayuan Wu Open the ORCID record for Jiayuan Wu [Opens in a new window] ,
Zhixiong Lin ,
Zhou Liu ,
Hairong He ,
Ling Bai  and
Jun Lyu
Jiayuan Wu
Affiliation:
School of Public Health, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China Department of Clinical Research, The Affiliated Hospital of Guangdong Medical University, Zhanjiang524001, Guangdong, China
Zhixiong Lin
Affiliation:
Department of Psychiatry, The Affiliated Hospital of Guangdong Medical University, Zhanjiang524001, Guangdong, China
Zhou Liu
Affiliation:
Department of Neurology, The Affiliated Hospital of Guangdong Medical University, Zhanjiang524001, Guangdong, China
Hairong He
Affiliation:
Clinical Research Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
Ling Bai
Affiliation:
Clinical Research Center, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
Jun Lyu*
Affiliation:
School of Public Health, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China Department of Clinical Research, The First Affiliated Hospital of Jinan University, Guangzhou, 510632, Guangdong, China
*
Author for correspondence: Jun Lyu, E-mail: lyujun2020@jun.edu.cn
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Abstract

Background

Eating disorders (ED) have increasingly become a global topic of concern for public health. A better understanding of ED incidence is a basic requirement for improving its management. However, the temporal trend of ED incidence in China is still unknown.

Methods

The incidence rates of ED from 1990 to 2017 were collected from the Global Burden of Disease Study 2017 database according to the following: subtype, i.e. anorexia nervosa (AN) and bulimia nervosa (BN); sex; and age group. The average annual percent changes and relative risks were calculated using joinpoint regression and the age–period–cohort model, respectively.

Results

From 1990 to 2017, age-standardized incidence rates of ED continued to increase in males and females, and this variation trend was observed in AN and BN. Joinpoint regression analysis showed that the incidence rates increased in all age groups. Adolescents had the highest risk of developing ED, followed by young adults. Age effects were the most influential risk factor for ED incidence. Period effects showed that the risk of developing ED continuously increased with increasing time periods in BN, but not in ED and AN. Concerning the cohort effects, people born after the 1990s presented a higher risk of ED, though they presented a lower risk of BN as compared to the whole cohort.

Conclusions

ED incidence rates continue to increase in China, particularly among adolescents and young adults. Further etiological studies are needed to explain these increases and to facilitate the early identification of high-risk individuals.

Keywords

Age–period–cohort modeleating disordersincidencejoinpoint regression analysistemporal trends
Type
Original Article
Information
Psychological Medicine , Volume 52 , Issue 5 , April 2022 , pp. 946 - 956
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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