User-driven design of child restraint information to reduce errors in use

a pilot randomised controlled trial

Alexandra B Hall, Catherine Ho, Bianca Albanese, Lisa Keay, Kate Hunter, Judith Charlton, Andrew Hayen, Lynne E Bilston, Julie Brown

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Background: Incorrect use of child restraints is a long-standing problem that increases the risk of injury in crashes. We used user-centred design to develop prototype child restraint instructional materials. The objective of this study was to evaluate these materials in terms of comprehension and errors in the use of child restraints. The relationship between comprehension and errors in use was also explored. Methods: We used a parallel-group randomised controlled trial in a laboratory setting. The intervention group (n=22) were provided with prototype materials and the control group (n=22) with existing instructional materials for the same restraint. Participants installed the restraint in a vehicle buck, secured an appropriately sized mannequin in the restraint and underwent a comprehension test. Our primary outcome was overall correct use, and our secondary outcomes were (1) comprehension score and (2) percent errors in the installation trial. Results: There was 27% more overall correct use (p=0.042) and a higher mean comprehension score in the intervention group (mean 17, 95% CI 16 to 18) compared with the control group (mean 12, 95% CI 10 to 14, p<0.001). The mean error percentage in the control group was 23% (95% CI 16% to 31%) compared with 14% in the intervention group (95% CI 8% to 20%, p=0.056). For every one point increase in comprehension, there was an almost 2% (95% CI-2.7% to-1.0%) reduction in errors (y=45.5-1.87x, p value for slope <0.001). Conclusions: Consumer-driven design of informational materials can increase the correct use of child restraints. Targeting improved comprehension of informational materials may be an effective mechanism for reducing child restraint misuse.

Original languageEnglish
JournalInjury Prevention
DOIs
Publication statusAccepted/In press - 2019

Keywords

  • child
  • interventions
  • motor vehicle occupant
  • product modification
  • randomised trial
  • restraints

Cite this

Hall, Alexandra B ; Ho, Catherine ; Albanese, Bianca ; Keay, Lisa ; Hunter, Kate ; Charlton, Judith ; Hayen, Andrew ; Bilston, Lynne E ; Brown, Julie. / User-driven design of child restraint information to reduce errors in use : a pilot randomised controlled trial. In: Injury Prevention. 2019.
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title = "User-driven design of child restraint information to reduce errors in use: a pilot randomised controlled trial",
abstract = "Background: Incorrect use of child restraints is a long-standing problem that increases the risk of injury in crashes. We used user-centred design to develop prototype child restraint instructional materials. The objective of this study was to evaluate these materials in terms of comprehension and errors in the use of child restraints. The relationship between comprehension and errors in use was also explored. Methods: We used a parallel-group randomised controlled trial in a laboratory setting. The intervention group (n=22) were provided with prototype materials and the control group (n=22) with existing instructional materials for the same restraint. Participants installed the restraint in a vehicle buck, secured an appropriately sized mannequin in the restraint and underwent a comprehension test. Our primary outcome was overall correct use, and our secondary outcomes were (1) comprehension score and (2) percent errors in the installation trial. Results: There was 27{\%} more overall correct use (p=0.042) and a higher mean comprehension score in the intervention group (mean 17, 95{\%} CI 16 to 18) compared with the control group (mean 12, 95{\%} CI 10 to 14, p<0.001). The mean error percentage in the control group was 23{\%} (95{\%} CI 16{\%} to 31{\%}) compared with 14{\%} in the intervention group (95{\%} CI 8{\%} to 20{\%}, p=0.056). For every one point increase in comprehension, there was an almost 2{\%} (95{\%} CI-2.7{\%} to-1.0{\%}) reduction in errors (y=45.5-1.87x, p value for slope <0.001). Conclusions: Consumer-driven design of informational materials can increase the correct use of child restraints. Targeting improved comprehension of informational materials may be an effective mechanism for reducing child restraint misuse.",
keywords = "child, interventions, motor vehicle occupant, product modification, randomised trial, restraints",
author = "Hall, {Alexandra B} and Catherine Ho and Bianca Albanese and Lisa Keay and Kate Hunter and Judith Charlton and Andrew Hayen and Bilston, {Lynne E} and Julie Brown",
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User-driven design of child restraint information to reduce errors in use : a pilot randomised controlled trial. / Hall, Alexandra B; Ho, Catherine; Albanese, Bianca; Keay, Lisa; Hunter, Kate; Charlton, Judith; Hayen, Andrew; Bilston, Lynne E; Brown, Julie.

In: Injury Prevention, 2019.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - User-driven design of child restraint information to reduce errors in use

T2 - a pilot randomised controlled trial

AU - Hall, Alexandra B

AU - Ho, Catherine

AU - Albanese, Bianca

AU - Keay, Lisa

AU - Hunter, Kate

AU - Charlton, Judith

AU - Hayen, Andrew

AU - Bilston, Lynne E

AU - Brown, Julie

PY - 2019

Y1 - 2019

N2 - Background: Incorrect use of child restraints is a long-standing problem that increases the risk of injury in crashes. We used user-centred design to develop prototype child restraint instructional materials. The objective of this study was to evaluate these materials in terms of comprehension and errors in the use of child restraints. The relationship between comprehension and errors in use was also explored. Methods: We used a parallel-group randomised controlled trial in a laboratory setting. The intervention group (n=22) were provided with prototype materials and the control group (n=22) with existing instructional materials for the same restraint. Participants installed the restraint in a vehicle buck, secured an appropriately sized mannequin in the restraint and underwent a comprehension test. Our primary outcome was overall correct use, and our secondary outcomes were (1) comprehension score and (2) percent errors in the installation trial. Results: There was 27% more overall correct use (p=0.042) and a higher mean comprehension score in the intervention group (mean 17, 95% CI 16 to 18) compared with the control group (mean 12, 95% CI 10 to 14, p<0.001). The mean error percentage in the control group was 23% (95% CI 16% to 31%) compared with 14% in the intervention group (95% CI 8% to 20%, p=0.056). For every one point increase in comprehension, there was an almost 2% (95% CI-2.7% to-1.0%) reduction in errors (y=45.5-1.87x, p value for slope <0.001). Conclusions: Consumer-driven design of informational materials can increase the correct use of child restraints. Targeting improved comprehension of informational materials may be an effective mechanism for reducing child restraint misuse.

AB - Background: Incorrect use of child restraints is a long-standing problem that increases the risk of injury in crashes. We used user-centred design to develop prototype child restraint instructional materials. The objective of this study was to evaluate these materials in terms of comprehension and errors in the use of child restraints. The relationship between comprehension and errors in use was also explored. Methods: We used a parallel-group randomised controlled trial in a laboratory setting. The intervention group (n=22) were provided with prototype materials and the control group (n=22) with existing instructional materials for the same restraint. Participants installed the restraint in a vehicle buck, secured an appropriately sized mannequin in the restraint and underwent a comprehension test. Our primary outcome was overall correct use, and our secondary outcomes were (1) comprehension score and (2) percent errors in the installation trial. Results: There was 27% more overall correct use (p=0.042) and a higher mean comprehension score in the intervention group (mean 17, 95% CI 16 to 18) compared with the control group (mean 12, 95% CI 10 to 14, p<0.001). The mean error percentage in the control group was 23% (95% CI 16% to 31%) compared with 14% in the intervention group (95% CI 8% to 20%, p=0.056). For every one point increase in comprehension, there was an almost 2% (95% CI-2.7% to-1.0%) reduction in errors (y=45.5-1.87x, p value for slope <0.001). Conclusions: Consumer-driven design of informational materials can increase the correct use of child restraints. Targeting improved comprehension of informational materials may be an effective mechanism for reducing child restraint misuse.

KW - child

KW - interventions

KW - motor vehicle occupant

KW - product modification

KW - randomised trial

KW - restraints

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U2 - 10.1136/injuryprev-2019-043380

DO - 10.1136/injuryprev-2019-043380

M3 - Article

JO - Injury Prevention

JF - Injury Prevention

SN - 1353-8047

ER -