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Prev Med. 2015 Sep;78:59-64. doi: 10.1016/j.ypmed.2015.07.007. Epub 2015 Jul 17.

Do provincial policies banning smoking in cars when children are present impact youth exposure to secondhand smoke in cars?

Author information

1
Department of Social and Epidemiological Research, Centre for Addiction and Mental Health, London, Ontario, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada. Electronic address: Tara.EltonMarshall@camh.ca.
2
School of Public Health and Health Systems, University of Waterloo, Waterloo, Ontario, Canada.
3
Department of Psychology, University of Waterloo, Waterloo, Ontario, Canada.
4
School of Public Health and Health Systems, University of Waterloo, Waterloo, Ontario, Canada; Propel Centre for Population Health Impact, University of Waterloo, Waterloo, Ontario, Canada.
5
Propel Centre for Population Health Impact, University of Waterloo, Waterloo, Ontario, Canada.

Abstract

OBJECTIVE:

To examine youth exposure to smoking in cars following 7 provincial bans on smoking in cars with children in Canada.

METHOD:

Repeated cross-sectional data from the 2004-2012 Youth Smoking Survey (n=91,800) were examined. Using a quasi-experimental design, contrasts of the interaction of survey year and province included in the logistic regression analyses were used to test whether exposure significantly declined pre-post implementation of a ban on smoking in cars relative to control provinces not implementing a ban.

RESULTS:

Exposure across all provinces declined from 26.5% in 2004 to 18.2% of youth in 2012. Exposure declined significantly from pre to post implementation of a ban on smoking in cars with children in Ontario at time 1 post ban (Pre-Ban=20.4% T1post=10.3%, OR=0.45), time 2 post ban (12.1%, OR=0.61) and time 3 post ban (11.6%, OR=0.58) relative to control provinces that did not implement a ban. In British Columbia exposure to smoking in cars declined significantly at pre-post ban time 3 compared to the control group (Pre-Ban=21.2%, T3post=9.6%, OR=0.51). No other provinces had a significant change in exposure pre-post ban relative to the control provinces.

INTERPRETATION:

Although rates declined, significant differences were only found in Ontario relative to control provinces in the immediate and long term.

KEYWORDS:

Children; Policy; Secondhand-smoke; Smoking; Youth

PMID:
26190367
DOI:
10.1016/j.ypmed.2015.07.007
[Indexed for MEDLINE]

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