Kun–Qi birth cohort (KQBC) study for the incidence, aetiology and risk factors of chronic kidney disease in Chinese children: a cohort profile

Kun–Qi birth cohort (KQBC) study for the incidence, aetiology and risk factors of chronic kidney disease in Chinese children: a cohort profile

Purpose The Kun–Qi birth cohort (KQBC) was established to investigate the incidence, aetiology and risk factors of chronic kidney disease (CKD) in early childhood (0–6 years). Additionally, the study analysed developmental phenotypic trajectories and their associated paediatric diseases.Participants...

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Main Authors: Yan Ma, Xingdong Chen, Jie Wei, Li Guo, Jian Huang, Li Xie, Lei Chen, Ping Lu, Wei Sun, Wei Shi, Feng Ding, Liping Zhang, Yue Zhang, Linlin Zhang, Rui Song, Yi Huang, Jun Shen, Hong Xu, Zhigang Chen, Qian Shen, Ying Ma, Yiwen Zhang, Hongxia Li, Yihui Zhai, Biao Xu, Xian Zhou, Jun Sun, Bing Wu, Rui Su, Xiaoyan Yu, Jianhong Zhu, Yihong Huang, Ling Gong, Nana Wu, Jingjing Sun, Tianyi Liu, He Yuan, Yiwen Shen, Jiaojiao Liu, Xia Han, Juanjuan Wu, Yinghua Sun, Suxiang Xu, Qinyi Zhang, Na Xie, Jianfeng Ji, Weizhi Mo, Yuanxin Liu, Xinghua Shi, Wanshan Qiu, Jiapeng Mi, Juhua Yan, Minghui Zhu, Pei Feng, Wenqian Sheng, Mingqin Tai, Chunqin Zhou, Qian Jin, Chengyu Gu, Xiujuan Huang, Qinfang Qian, Yixin Cao, Haochen Shen, Ziwen Xue, Yucui Ma, Juan Tian, Yingdan Zhang, Weiyuan Zhuang, Kaiqun Yang, Xiaohui Shen, Yanwei Gu, Beibei Shi, Chenhong Pan, Hongmei Zhou, Xiuchen Zhang, Meihua Tang, Kaixuan Gu, Hongping Liu, Yuanxian Li
Format: Article
Language:English
Published: BMJ Publishing Group 2025-08-01
Series:BMJ Open
Online Access:https://bmjopen.bmj.com/content/15/8/e102702.full
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Summary:Purpose The Kun–Qi birth cohort (KQBC) was established to investigate the incidence, aetiology and risk factors of chronic kidney disease (CKD) in early childhood (0–6 years). Additionally, the study analysed developmental phenotypic trajectories and their associated paediatric diseases.Participants Infants registered or residing in Kunshan and Qidong, Jiangsu Province, who participated in the Chinese Child Healthcare Programme (0–6 years) were enrolled. The baseline population was stratified into enhanced and basic cohorts. General characteristics, periconceptional and perinatal information and health check-up data were collected from each participant. Dual screening (urinary ultrasound and urine dipstick tests) was conducted during scheduled check-ups. Structured CKD questionnaires were administered, and biosamples (urine and dried blood spots) were obtained for the long-term storage and analysis using standard procedures. Based on the proposed referral procedure, participants with abnormal results were referred for further diagnosis and evaluation.Findings to date The KQBC enrolled 10 127 infants (5392 boys and 4735 girls) with a mean age of 2.11±1.68 months. Urinary system ultrasound and urine dipstick screening showed positivity rates of 8.9% (900/10 083) and 6.5% (532/8233), respectively. Baseline ultrasound screening facilitated timely surgical intervention in six children. Among the 7965 respondents, only 13% demonstrated awareness of paediatric CKD. Additionally, 7273 dried blood spots and 7990 urine specimens were collected and stored. A paediatric CKD screening platform was developed.Future plans According to our plan, the KQBC will be followed up for 3–6 years to investigate the incidence, aetiology and risk factors of early onset CKD. In-depth developmental phenotypes, such as urinary multiomics and ultrasound imaging, should be studied for longitudinal paediatric kidney health. We aim to develop multimodal risk prediction models by integrating genomics and artificial intelligence algorithms. The KQBC also enables prospective cohort studies addressing extensive research questions.Trial registration number NCT06018831.
ISSN:2044-6055

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