Evidence map›Paper›PMID 25378438›Full record

ArticleSchizophrenia bulletin2015

Advancing paternal age and schizophrenia: the impact of delayed fatherhood.

Mats Ek, Susanne Wicks, Anna C Svensson, Selma Idring, Christina Dalman

Abstract read
In one paragraph

Article in Schizophrenia bulletin, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

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

15 citing papers in PubMed.

  1. Article
  2. Stress, Environment and Early Psychosis.Current neuropharmacology · 2024
    Review
  3. Article
  4. Article
  5. Review
  6. Advanced Paternal Age and Future Generations.Frontiers in endocrinology · 2022
    Review
  7. Review
  8. Observational
  9. Article
  10. 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
  11. Review
  12. Observational
  13. Paternal age effect: Replication in schizophrenia with intriguing dissociation between bipolar with and without psychosis.American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics · 2016
    Article
  14. Article
  15. Review
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

5 authors.

Mats EkDivision of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden mats.ek@ki.se.
Susanne WicksDivision of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden.
Anna C SvenssonDivision of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden.
Selma IdringDivision of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden.
Christina DalmanDivision of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveIt is well known that advancing paternal age is associated with an increased risk of schizophrenia in offspring, but the mechanism behind this association remains unknown. This study investigates if delayed fatherhood rather than advancing paternal age per se might explain the increased risk of schizophrenia in offspring associated with advancing paternal age.

methodsThis is a register-based study of the Swedish population looking at people born 1955-1985 who have 1 or 2 siblings (n = 2 589 502). The main analysis investigated whether the association between advancing paternal age and schizophrenia was explained by delayed fatherhood. Possible confounding factors were taken into account. Cox regression was used throughout.

resultsIn the main analysis the association between advancing paternal age and increased risk of schizophrenia in offspring disappeared after controlling for delayed fatherhood (hazard ratio [HR] = 0.93, 95% CI = 0.72-1.21 comparing 45+ years old fathers to those 25-29), whereas delayed fatherhood showed an association with increased risk of schizophrenia in offspring comparing 35-39 and 40-44 years old fathers to 25-29 year olds (HR = 1.37, 95% CI = 1.18-1.58; HR = 1.81, 95% CI = 1.44-2.28, respectively). The results remained when controlling for possible confounders.

conclusionsThis study suggests that the association between paternal age and schizophrenia is not due to paternal age per se, but rather to an unknown factor associated with both delayed fatherhood and schizophrenia.

Indexed as

Paternal AgeRegistriesAdultAge FactorsFemaleFollow-Up StudiesHumansMaleMiddle AgedPsychotic DisordersSchizophreniaSwedenYoung Adultepidemiologyparentspsychotic disordersregistriesrisk factors

Identifiers

PMID25378438
PMCPMC4393690

What OpenQuestion holds

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Registered trials

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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.