Evidence map›Paper›PMID 34104569›Full record

ArticleHealth psychology and behavioral medicine2021

Too many zeros and/or highly skewed? A tutorial on modelling health behaviour as count data with Poisson and negative binomial regression.

James A Green

Abstract read
In one paragraph

Article in Health psychology and behavioral medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers.

0numbers the graph read from it
0cells of the map it votes in
68citing 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

68 citing papers in PubMed.

  1. Trial
  2. Article
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  6. Article
  7. Household income and food addiction symptoms predict ultra-processed foods intake in Brazilian university students: implications for policy.Psicologia, reflexao e critica : revista semestral do Departamento de Psicologia da UFRGS · 2026
    Article
  8. Article
  9. Observational
  10. Article
  11. Article
  12. Article
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  14. Article
  15. Reductions in Respiratory Hospital Visits after a Coal Coking Plant Closure: A Natural Experiment.American journal of respiratory and critical care medicine · 2025
    Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

8 more citing papers are in PubMed but not listed here.

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

1 author.

James A GreenSchool of Allied Health, University of Limerick, Limerick, Ireland.ORCID https://orcid.org/0000-0002-7309-0751

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

PubMed holds no abstract for this paper.

Indexed as

Count datanegative binomial regressionPoisson regressionskewed datatutorial

Identifiers

PMID34104569
PMCPMC8159206

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.