Evidence map›Paper›PMID 26911588›Full record

ArticleBMJ open2016

Secular trends for age at spermarche among Chinese boys from 11 ethnic minorities, 1995-2010: a multiple cross-sectional study.

Yi Song, Jun Ma, Liu-Bai Li, Bin Dong, Zhiqiang Wang, Anette Agardh

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Article in BMJ open, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
–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

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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

8 citing papers in PubMed.

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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

6 authors.

Yi SongInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, China Social Medicine and Global Health, Department of Clinical Sciences, Lund University, Malmö, Sweden.
Jun MaInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, China.
Liu-Bai LiInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, China.
Bin DongCentre for Chronic Disease, School of Medicine, University of Queensland, Health Sciences Building, Royal Brisbane & Women's Hospital, Herston, Queensland, Australia.
Zhiqiang WangInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, China Centre for Chronic Disease, School of Medicine, University of Queensland, Health Sciences Building, Royal Brisbane & Women's Hospital, Herston, Queensland, Australia.
Anette AgardhSocial Medicine and Global Health, Department of Clinical Sciences, Lund University, Malmö, Sweden.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesWe compared the differences in median age at spermarche among 11 ethnic minorities in 2010, estimated the trends regarding age at spermarche in different ethnic minorities from 1995 to 2010, and explored the association of spermarche with body mass index (BMI).

methodsWe used four cross-sectional Chinese National Surveys on Students' Constitution and Health (CNSSCH, 1995, 2000, 2005 and 2010), and the total sample size was 40,113 children aged 11-18 years. The median age at spermarche of each ethnic minority was determined by using probit analysis. Logistic regression was used to assess the association of spermarche with BMI.

resultsIn 2010, the ethnic minorities with earliest age at spermarche were Qiang (12.03 years), Zhuang (12.91 years) and Kirghiz (13.17 years); the three ethnic minorities with latest age at spermarche were Dong (14.73 years), Yao (14.60 years), and Naxi (14.36 years). From 1995 to 2010, age at spermarche showed a decline in almost each minority group except Yao and Dong. A higher BMI was associated with an increased likelihood of having reached spermarche after adjusting for age, regions or ethnic minorities.

conclusionsA large variation in age at spermarche was observed among different ethnic minorities. The age at spermarche showed a downward shift in almost each of the 11 ethnic minorities with different patterns over time, and the children with higher BMI are more likely to enter puberty early.

Indexed as

Body Mass IndexPubertyAdolescentChildChinaCross-Sectional StudiesEthnicityHumansMaleMinority GroupsNUTRITION & DIETETICSPAEDIATRICS

Identifiers

PMID26911588
PMCPMC4769404

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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.