Evidence map›Paper›PMID 26220757›Full record

ArticleGlobal health action2015

Secular trends in age at menarche among Chinese girls from 24 ethnic minorities, 1985 to 2010.

Yi Song, Jun Ma, Anette Agardh, Patrick W C Lau, Peijin Hu, Bing Zhang

Open access · goldAbstract read
In one paragraph

Article in Global health action, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
7.2field-weighted citation impact, top 4% of its field
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

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 44 citations in OpenAlex.

  1. Pooled it
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  9. Review
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  11. Secular Trends in Height, Body Mass and Mean Menarche Age in Romanian Children and Adolescents, 1936-2016.International journal of environmental research and public health · 2021
    Article
  12. Article
  13. Next Steps in Puberty Research: Broadening the Lens Toward Understudied Populations.Journal of research on adolescence : the official journal of the Society for Research on Adolescence · 2019
    Review
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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 at 3 institutions in 3 countries.

Yi SongInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, China.
Jun MaInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, China; majunt@bjmu.edu.cn.
Anette AgardhSocial Medicine and Global Health, Department of Clinical Sciences, Lund University, Malmö, Sweden.
Patrick W C LauDepartment of Physical Education, Hong Kong Baptist University, Kowloon Tong, Hong kong, People's Republic of China.
Peijin HuInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, China.
Bing ZhangInstitute of Child and Adolescent Health, School of Public Health, Peking University, Beijing, China.
Peking University · CNLund University · SEHong Kong Baptist University · HK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDeclining age at menarche has been observed in many countries. In China, a decrease of 4.5 months per decade in the average age at menarche among the majority Han girls has recently been reported. However, the trends in age at menarche among ethnic minority girls over the past 25 years remain unknown.

objectivesTo compare the differences in median age at menarche among girls aged 9-18 years across 24 ethnic minorities in 2010 and to estimate the trends in age at menarche in different ethnic minorities from 1985 to 2010.

designWe used data from six cross-sectional Chinese National Surveys on Students' Constitution and Health (1985, 1991, 1995, 2000, 2005, and 2010). The median age at menarche was estimated by using probit analysis.

resultsIn 2010, the ethnic minorities with the earliest age at menarche were the Koreans (11.79 years), Mongolians (12.44 years), and Zhuang (12.52 years). The three ethnic minorities with the latest age at menarche were the Sala (14.32 years), Yi (13.74 years), and Uighurs (13.67 years). From 1985 to 2010, the age at menarche declined in all 24 minority groups. The Lisu, Kazakh, and Korean minorities showed the largest reductions in age at menarche by 1.79 (p<0.05), 1.69 (p<0.05), and 1.57 (p<0.05) years, respectively, from 1985 to 2010. The Yi, Sala, and Li minorities showed the smallest reductions, with age at menarche declining by only 0.06 (p>0.05), 0.15 (p>0.05), and 0.15 (p>0.05) years, respectively, in the same period.

conclusionA large variation in age at menarche was observed among different ethnic minorities, with the earliest age at menarche found among Korean girls. A reduction in the average age at menarche appeared among most of the ethnic minorities over time, and the largest decrease was observed in Lisu, Kazakh, and Korean girls. Thus, health education should focus on targeting the specific needs of each ethnic minority group.

Indexed as

AdolescentAsian PeopleChildChinaCross-Sectional StudiesEthnicityFemaleHumansMenarcheMinority GroupsChinaethnic minoritiesgirlsmenarchepuberty developmenttrend analysis

Identifiers

PMID26220757
PMCPMC4518164
OpenAlexW1865381191

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.