Evidence map›Paper›PMID 24922150›Full record

ArticleAmerican journal of public health2014

Public bicycle share programs and head injuries.

Janessa M Graves, Barry Pless, Lynne Moore, Avery B Nathens, Garth Hunte, Frederick P Rivara

Abstract read
In one paragraph

Article in American journal of public health, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
–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

11 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  9. Article
  10. Net effects of bicycle share programs on bike safety.American journal of public health · 2014
    Article
  11. The safety of public bicycle share programs in North America.American journal of public health · 2014
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

Janessa M GravesAt the time of this study, Janessa M. Graves was with Harborview Injury Prevention and Research Center, Department of Pediatrics, University of Washington School of Medicine, Seattle, and the College of Nursing at Washington State University, Spokane. Barry Pless is with Epidemiology and Biostatistics, McGill University, and the Injury Prevention Program at the Montreal Children's Hospital, Montreal, QC. Lynne Moore is with the Centre de Recherche du Centre Hospitalier Affilié Universitaire de Québec-Hôpital de l'Enfant-Jésus, Traumatologie-Urgence-Soins Intensifs, Axe Sante des Populations-Pratiques Optimales en Sante, Québec. Avery B. Nathens is with Sunnybrook Health Sciences Centre, the University of Toronto, and Systems of Trauma Care, Toronto, ON. Garth Hunte is with the Department of Emergency Medicine, University of British Columbia, Vancouver. Frederick P. Rivara is with Seattle Children's Hospital and Department of Pediatrics, University of Washington, and Harborview Injury and Research Center, Seattle.
Barry Pless
Lynne Moore
Avery B Nathens
Garth Hunte
Frederick P Rivara

Funding

Pediatric Injury Research Training ProgramT32HD057822 · NICHD · UNIVERSITY OF WASHINGTON · PI CAROLYN A MC CARTY, Ali Rowhani-Rahbar · 2010 to 2026
$4.0M
NICHD NIH HHS T32 HD057822NICHD NIH HHS T32 HD057822-01A2
6 · The paper itself

Abstract

objectivesWe evaluated the effect of North American public bicycle share programs (PBSPs), which typically do not offer helmets with rentals, on the occurrence of bicycle-related head injuries.

methodsWe analyzed trauma center data for bicycle-related injuries from 5 cities with PBSPs and 5 comparison cities. We used logistic regression models to compare the odds that admission for a bicycle-related injury would involve a head injury 24 months before PBSP implementation and 12 months afterward.

resultsIn PBSP cities, the proportion of head injuries among bicycle-related injuries increased from 42.3% before PBSP implementation to 50.1% after (P < .01). This proportion in comparison cities remained similar before (38.2%) and after (35.9%) implementation (P = .23). Odds ratios for head injury were 1.30 (95% confidence interval = 1.13, 1.67) in PBSP cities and 0.94 (95% confidence interval = 0.79, 1.11) in control cities (adjusted for age and city) when we compared the period after implementation to the period before.

conclusionsResults suggest that steps should be taken to make helmets available with PBSPs. Helmet availability should be incorporated into PBSP planning and funding, not considered an afterthought following implementation.

Indexed as

AdolescentAdultBicyclingCanadaCitiesCraniocerebral TraumaHumansMiddle AgedUnited StatesYoung Adult

Identifiers

PMID24922150
PMCPMC4103224

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.