Evidence map›Paper›PMID 22000939›Full record

ArticleSchizophrenia research2011

Advanced paternal and grandpaternal age and schizophrenia: a three-generation perspective.

Emma M Frans, John J McGrath, Sven Sandin, Paul Lichtenstein, Abraham Reichenberg, Niklas Långström, Christina M Hultman

Abstract read
In one paragraph

Article in Schizophrenia research, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
3.4field-weighted citation impact, top 8% 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, 76 citations in OpenAlex.

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  10. Use of Population-Level Administrative Data in Developmental Science.Annual review of developmental psychology · 2022
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  19. Paternal Age Alters Social Development in Offspring.Journal of the American Academy of Child and Adolescent Psychiatry · 2017
    Article
  20. Paternal age and psychiatric disorders: A review.American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics · 2017
    Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 4 countries.

Emma M FransDepartment of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
John J McGrath
Sven Sandin
Paul Lichtenstein
Abraham Reichenberg
Niklas Långström
Christina M Hultman
Karolinska Institutet · SEIcahn School of Medicine at Mount Sinai · USUniversity of Queensland · AU

Funding

Quasi-experimental studies of early risk factors for severe psychopathologyR01HD061817 · NICHD · TRUSTEES OF INDIANA UNIVERSITY · PI D'ONOFRIO, BRIAN M, LICHTENSTEIN, PAUL · 2010 to 2013
$1.3M
NICHD NIH HHS R01 HD061817
6 · The paper itself

Abstract

backgroundAdvanced paternal age has been linked with an increased risk of schizophrenia in the offspring. If age-related de novo mutations in the male germ line underlie this association, grandpaternal and paternal age would both be expected to influence the risk of schizophrenia. The aim of the current study was to explore the links between both paternal and grandpaternal age with respect to the risk of schizophrenia in a large, national register-based cohort.

methodWe linked the Swedish Multi-Generation and Hospital Discharge Registers and compared parents' ages at offspring birth for 20,582 schizophrenia-affected and 100,176 non-affected individuals. Grandparents' ages at the birth of the parent were compared between 2511 affected and 15,619 non-affected individuals. The risk of schizophrenia was examined with logistic regression when the predictor variable (parent or grandparent age) varied across age strata.

resultsAfter adjusting for maternal age, birth year and proband sex, we confirmed that offspring of older fathers had an increased risk of schizophrenia. Compared to those with paternal age 20-24years, those with fathers >55years had a two-fold increased risk of schizophrenia. With respect to grandparent age, older maternal (but not paternal) grandfather age was associated with an increased risk of schizophrenia. Compared to maternal grandfather age 20-24years, those with maternal grandfathers >55years had a significantly increased risk of schizophrenia (adjusted odds ratio and 95% confidence intervals; 2.79, 1.71-4.56). The pattern of results was essentially unchanged when we examined male and female probands separately.

conclusionThis is the first study to report an association between grandpaternal age and risk of schizophrenia. The selective effect of advanced maternal grandfather age suggests that the biological mechanisms involving the X-chromosome may differentially contribute to the association between paternal age and offspring risk of schizophrenia.

Indexed as

Family HealthParentsAdolescentAdultAgedAge FactorsFemaleHumansLogistic ModelsMaleMiddle AgedRisk FactorsSchizophreniaSex FactorsSwedenYoung Adult

Identifiers

PMID22000939
PMCPMC3660090
OpenAlexW2015526034

What OpenQuestion holds

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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.