Evidence map›Paper›PMID 21940799›Full record

ArticleAmerican journal of epidemiology2011

Associations of birth order with early growth and adolescent height, body composition, and blood pressure: prospective birth cohort from Brazil.

Jonathan C K Wells, Pedro C Hallal, Felipe F Reichert, Samuel C Dumith, Ana M Menezes, Cesar G Victora

Open access · greenAbstract read
In one paragraph

Article in American journal of epidemiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 1 pooled it
6.6field-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

36 citing papers in PubMed, 1 synthesis or guideline pooled it, 78 citations in OpenAlex.

  1. Pooled it
  2. The Maternal Capital Hypothesis: Giving Mothers Central Place in Evolutionary Perspectives on Developmental Plasticity and Health.American journal of human biology : the official journal of the Human Biology Council · 2025
    Review
  3. Article
  4. Observational
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  8. Observational
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  18. Developmental plasticity as adaptation: adjusting to the external environment under the imprint of maternal capital.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2019
    Review
  19. Article
  20. 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

6 authors at 2 institutions in 2 countries.

Jonathan C K WellsChildhood Nutrition Research Centre, Institute of Child Health, University College London, United Kingdom. j.wells@ich.ucl.ac.uk
Pedro C Hallal
Felipe F Reichert
Samuel C Dumith
Ana M Menezes
Cesar G Victora
University College London · GBInstitute of Child Health · IN

Funding

Medical Research CouncilWellcome Trust
6 · The paper itself

Abstract

Birth weight has been inversely associated with later blood pressure. Firstborns tend to have lower birth weight than their later-born peers, but the long-term consequences remain unclear. The study objective was to investigate differences between firstborn and later-born individuals in early growth patterns, body composition, and blood pressure in Brazilian adolescents. The authors studied 453 adolescents aged 13.3 years from the prospective 1993 Pelotas Birth Cohort. Anthropometry, blood pressure, physical activity by accelerometry, and body composition by deuterium were measured. Firstborns (n = 143) had significantly lower birth weight than later borns (n = 310). At 4 years, firstborns had significantly greater weight and height, indicating a substantial overshoot in catch-up growth. In adolescence, first borns had significantly greater height and blood pressure and a lower activity level. The difference in systolic blood pressure could be attributed to variability in early growth and that in diastolic blood pressure to reduced physical activity. The magnitude of increased blood pressure is clinically significant; hence, birth order is an important developmental predictor of cardiovascular risk in this population. Firstborns may be more sensitive to environmental factors that promote catch-up growth, and this information could potentially be used in nutritional management to prevent catch-up "overshoot."

Indexed as

Adolescent DevelopmentBirth OrderBlood PressureBody CompositionBody HeightAdolescentAdultBirth WeightBody WeightBrazilChild DevelopmentChild, PreschoolChi-Square DistributionFemaleHumansInfant

Identifiers

PMID21940799
PMCPMC3658103
OpenAlexW2160594435

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.