Evidence map›Paper›PMID 40579946›Full record

ArticleAndrology2026

Epidemiology of hypospadias in China: A nationwide surveillance-based study, 2010-2020.

Chen Zhiyu, Gao Yuyang, Xu Wenli, Li Wenyan, Liu Zhen, Zhou Jiayuan, Zhu Jun, Dai Li

Abstract read
In one paragraph

Article in Andrology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

4 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Chen ZhiyuNational Center for Birth Defects Monitoring, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.
Gao YuyangNational Center for Birth Defects Monitoring, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.
Xu WenliNational Center for Birth Defects Monitoring, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.
Li WenyanNational Center for Birth Defects Monitoring, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.ORCID 0009-0002-5583-2894
Liu ZhenNational Center for Birth Defects Monitoring, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.
Zhou JiayuanNational Center for Birth Defects Monitoring, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.
Zhu JunNational Center for Birth Defects Monitoring, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.
Dai LiNational Center for Birth Defects Monitoring, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, China.

Funding

National Health Commission of the People's Republic of China
6 · The paper itself

Abstract

backgroundThe prevalence of hypospadias varied internationally. However, epidemiological data on hypospadias in contemporary China remain limited.

objectivesWe aim to examine the epidemiological characteristics of hypospadias in Chinese population. MATERIALS AND

methodsWe performed a prevalence analysis using data from the Chinese Birth Defects Monitoring Network from 2010 to 2020. We analyzed the prevalence of overall, isolated, and associated hypospadias by birth year, maternal age, maternal residence, and geographic region. We used Poisson regression with adjusted prevalence rate ratios for assessing the impact of demographic characteristics and Joinpoint regression for analyzing temporal trends.

resultsA total of 11,782 hypospadias cases were identified among 11,575,036 male births with a prevalence of 10.18 per 10,000 male births. Of these, 9700 (82.3%) were isolated and 2082 (17.7%) were associated hypospadias. Of these cases, 639 (5.4%) were classified as anterior hypospadias, 1052 (8.9%) as middle hypospadias, 413 (3.5%) as proximal hypospadias, and 9678 (82.1%) as unspecified hypospadias, based on their severity. The prevalence of overall, isolated, and associated hypospadias increased significantly over the study period. Prevalence also varied significantly by maternal residence, maternal age, and geographical region. Infants with associated hypospadias experienced a significant higher risk of perinatal death. The most frequent associated anomalies involved the cardiovascular, genitourinary, and musculoskeletal systems. DISCUSSION AND

conclusionThis study provides contemporary national data on the epidemiology of hypospadias in China. The observed increasing prevalence and variations by severity underscore the need for further etiological, epidemiological, and clinical research.

Indexed as

HypospadiasAdultChinaFemaleHumansInfantInfant, NewbornMalePrevalenceChinaepidemiologyhypospadiasprevalence

Identifiers

PMID40579946
PMCPMC12919679

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.