Evidence map›Paper›PMID 27854530›Full record

ArticleAmerican journal of public health2017

The Impact of Michigan's Partial Repeal of the Universal Motorcycle Helmet Law on Helmet Use, Fatalities, and Head Injuries.

Patrick M Carter, Lisa Buckley, Carol A C Flannagan, Jessica B Cicchino, Mark Hemmila, Patrick J Bowman, Farideh Almani, C Raymond Bingham

Abstract read
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In one paragraph

Article in American journal of public health, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing 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

5 citing papers in PubMed.

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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

8 authors.

Patrick M CarterPatrick M. Carter is with the Injury Center, School of Medicine, University of Michigan, Ann Arbor. Lisa Buckley, Carol A. C. Flannagan, Patrick J. Bowman, Farideh Almani, and C. Raymond Bingham are with the Transportation Research Institute, University of Michigan. Jessica B. Cicchino is with Insurance Institute for Highway Safety, Arlington, VA. Mark Hemmila is with the Division of Acute Care Surgery, Department of Surgery, School of Medicine, University of Michigan.
Lisa BuckleyPatrick M. Carter is with the Injury Center, School of Medicine, University of Michigan, Ann Arbor. Lisa Buckley, Carol A. C. Flannagan, Patrick J. Bowman, Farideh Almani, and C. Raymond Bingham are with the Transportation Research Institute, University of Michigan. Jessica B. Cicchino is with Insurance Institute for Highway Safety, Arlington, VA. Mark Hemmila is with the Division of Acute Care Surgery, Department of Surgery, School of Medicine, University of Michigan.
Carol A C FlannaganPatrick M. Carter is with the Injury Center, School of Medicine, University of Michigan, Ann Arbor. Lisa Buckley, Carol A. C. Flannagan, Patrick J. Bowman, Farideh Almani, and C. Raymond Bingham are with the Transportation Research Institute, University of Michigan. Jessica B. Cicchino is with Insurance Institute for Highway Safety, Arlington, VA. Mark Hemmila is with the Division of Acute Care Surgery, Department of Surgery, School of Medicine, University of Michigan.
Jessica B CicchinoPatrick M. Carter is with the Injury Center, School of Medicine, University of Michigan, Ann Arbor. Lisa Buckley, Carol A. C. Flannagan, Patrick J. Bowman, Farideh Almani, and C. Raymond Bingham are with the Transportation Research Institute, University of Michigan. Jessica B. Cicchino is with Insurance Institute for Highway Safety, Arlington, VA. Mark Hemmila is with the Division of Acute Care Surgery, Department of Surgery, School of Medicine, University of Michigan.
Mark HemmilaPatrick M. Carter is with the Injury Center, School of Medicine, University of Michigan, Ann Arbor. Lisa Buckley, Carol A. C. Flannagan, Patrick J. Bowman, Farideh Almani, and C. Raymond Bingham are with the Transportation Research Institute, University of Michigan. Jessica B. Cicchino is with Insurance Institute for Highway Safety, Arlington, VA. Mark Hemmila is with the Division of Acute Care Surgery, Department of Surgery, School of Medicine, University of Michigan.
Patrick J BowmanPatrick M. Carter is with the Injury Center, School of Medicine, University of Michigan, Ann Arbor. Lisa Buckley, Carol A. C. Flannagan, Patrick J. Bowman, Farideh Almani, and C. Raymond Bingham are with the Transportation Research Institute, University of Michigan. Jessica B. Cicchino is with Insurance Institute for Highway Safety, Arlington, VA. Mark Hemmila is with the Division of Acute Care Surgery, Department of Surgery, School of Medicine, University of Michigan.
Farideh AlmaniPatrick M. Carter is with the Injury Center, School of Medicine, University of Michigan, Ann Arbor. Lisa Buckley, Carol A. C. Flannagan, Patrick J. Bowman, Farideh Almani, and C. Raymond Bingham are with the Transportation Research Institute, University of Michigan. Jessica B. Cicchino is with Insurance Institute for Highway Safety, Arlington, VA. Mark Hemmila is with the Division of Acute Care Surgery, Department of Surgery, School of Medicine, University of Michigan.
C Raymond BinghamPatrick M. Carter is with the Injury Center, School of Medicine, University of Michigan, Ann Arbor. Lisa Buckley, Carol A. C. Flannagan, Patrick J. Bowman, Farideh Almani, and C. Raymond Bingham are with the Transportation Research Institute, University of Michigan. Jessica B. Cicchino is with Insurance Institute for Highway Safety, Arlington, VA. Mark Hemmila is with the Division of Acute Care Surgery, Department of Surgery, School of Medicine, University of Michigan.

Funding

The Unviersity of Michigan Injury CenterR49CE002099 · CE · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI CUNNINGHAM, REBECCA M. · 2012 to 2018
$5.6M
M-Health to Decrease Youth Substance Misuse & High Risk Illegal Firearm BehaviorsK23DA039341 · NIDA · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI CARTER, PATRICK M. · 2016 to 2020
$969k
ACL HHS R49CE002099NCIPC CDC HHS R49 CE002099NIDA NIH HHS K23 DA039341
6 · The paper itself

Abstract

objectivesTo evaluate the impact of the partial repeal of Michigan's universal motorcycle helmet law on helmet use, fatalities, and head injuries.

methodsWe compared helmet use rates and motorcycle crash fatality risk for the 12 months before and after the April 13, 2012, repeal with a statewide police-reported crash data set. We linked police-reported crashes to injured riders in a statewide trauma registry. We compared head injury before and after the repeal. Regression examined the effect of helmet use on fatality and head injury risk.

resultsHelmet use decreased in crash (93.2% vs 70.8%; P < .001) and trauma data (91.1% vs 66.2%; P < .001) after the repeal. Although fatalities did not change overall (3.3% vs 3.2%; P = .87), head injuries (43.4% vs 49.6%; P < .05) and neurosurgical intervention increased (3.7% vs 6.5%; P < .05). Male gender (adjusted odds ratio [AOR] = 1.65), helmet nonuse (AOR = 1.84), alcohol intoxication (AOR = 11.31), intersection crashes (AOR = 1.62), and crashes at higher speed limits (AOR = 1.04) increased fatality risk. Helmet nonuse (AOR = 2.31) and alcohol intoxication (AOR = 2.81) increased odds of head injury.

conclusionsMichigan's helmet law repeal resulted in a 24% to 27% helmet use decline among riders in crashes and a 14% increase in head injury.

Indexed as

Accidents, TrafficAdolescentAdultCraniocerebral TraumaFemaleHead Protective DevicesHumansMaleMichiganMiddle AgedMotorcyclesRetrospective Studies

Identifiers

PMID27854530
PMCPMC5308169

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.