Measuring for change: A multi-centre pre-post trial of an air quality feedback intervention to promote smoke-free homes.

INTRODUCTION: Second-hand smoke exposure in the home is a serious cause of ill-health for children. Behaviour change interventions have been developed to encourage parents to keep homes smoke-free. This study evaluates a novel air quality feedback intervention using remote air quality monitoring with SMS and email messaging to promote smoke-free homes among families from deprived areas. METHODS: This paper presents a pre-post study of this intervention. Using internet connected monitors developed with the Dylos DC1700, daily SMS and weekly email feedback provided for 16 days to participants recruited in four European countries. Participants were recruited based on their stage of change, in order to target those most able to achieve smoke-free homes. The primary outcome measure was median change in mean fine particulate matter (PM2.5) concentration between baseline and follow-up periods, while secondary outcome measures included change in time over the World Health Organisation (WHO) guideline limit for PM2.5 exposure over 24 h (25 µg/m3) in those periods and the number of homes where PM2.5 concentrations reduced. Telephone interviews were conducted with participants in Scotland post-intervention to explore intervention experience and perceived effectiveness. RESULTS: Of 86 homes that completed the intervention study, 57 (66%) experienced pre-post reductions in measured PM2.5. The median reduction experienced was 4.1 µg/m3 (a reduction of 19% from baseline, p = 0.008). Eight homes where concentrations were higher than the WHO guideline limit at baseline fell below that level at follow-up. In follow-up interviews, participants expressed positive views on the usefulness of air quality feedback. DISCUSSION: Household air quality monitoring with SMS and email feedback can lead to behaviour change and consequent reductions in SHS in homes, but within the context of our study few homes became totally smoke-free.

Smoke-Free Homes and Youth Smoking Behavior in Italy: Findings From the SIDRIAT Longitudinal Study.

INTRODUCTION: Few studies have explored whether smoke-free homes (SFH) can promote reductions of smoking onset in children, particularly in households with smoking parents. The aim of this study was to determine whether youths living in SFH were less likely to progress to smoking. METHODS: We conducted a longitudinal, 11-year, two-wave study on 778 children aged 6-7 years and 985 adolescents aged 13-14 in 2002. At baseline, youths were asked whether or not adults smoked at home (SFH); at follow-up, in 2012-2014, whether a household smoking ban (HSB) had been implemented during the course of the study. Logistic regression was used to investigate SFH effects on youth smoking behaviors. RESULTS: Sixty-nine percent of children and 54% of adolescents reported SFH at baseline; 80% of children and 71% of adolescents reported HSB at follow-up. Youths living in non-SFH at baseline were twice as likely to become established smokers at follow-up compared with those living in SFH (children + adolescents: odds ratio [OR] = 1.99; 95% confidence interval [CI] = 1.39-2.94; adolescents: OR = 2.15; 95% CI = 1.36-3.42; children: OR = 1.69; 95% CI = 0.80-3.56), either for youths living with nonsmoking parents at baseline and follow-up (OR for both children and adolescents = 3.06; 95% CI = 1.70-5.51) or for youths with ≥1 smoking parent at baseline and follow-up (OR = 2.12, 95% CI = 1.01-4.46). The effect was greater in youths living in the worst situation (non-SFH at baseline + non-HSB at follow-up) compared with those in the best situation (SFH at baseline + HSB at follow-up; children: OR = 3.20; 95% CI = 1.10-9.35; adolescents: OR = 5.41; 95% CI = 2.66-10.97). CONCLUSIONS: Household smoke-free policies had a significant impact in protecting youths from becoming established smokers. IMPLICATIONS: The results of the SIDRIAT longitudinal study showed that youths living in homes where people smoked at baseline were twice as likely to become established smokers 11 years later at follow-up, compared with youths living in SFH. The lower number of established smokers among youths living in SFH at baseline was recorded not only in households with nonsmoking parents but also in those with smoking parents. Implementing a home smoking ban is recommended in all households. Living in homes with no ban may be a risk factor for smoking initiation, which is independent of having smoking parents.

Impact of National Smoke-Free Legislation on Educational Disparities in Smoke-Free Homes: Findings from the SIDRIAT Longitudinal Study.

Families with lower socioeconomic status are less likely to adopt household smoking bans (HSB). The aim of this study was to determine whether socioeconomic disparities in HSB prevalence in Italy decreased 7-9 years after the introduction of the Italian ban on smoking in public places. A longitudinal, 12-year, two-wave study was conducted on a sample of 3091 youths aged 6-14 years in 2002; 1763 (57%) were re-interviewed in 2012-2014. A Poisson regression with a robust error variance was used to assess the association between socioeconomic disparities and HSB prevalence. The adoption of HSBs significantly increased from 60% in 2002 to 75% in 2012-2014, with the increase recorded in youths with ≥1 smoking parent only (from 22% at baseline to 46% at follow-up). The presence of HSBs at baseline was more likely in families with ≥1 graduate parent compared to those with no graduate parents (prevalence ratio (PR) = 1.34, 95% confidence interval (CI) = 1.15-1.57), either in families with ≥1 smoking parent (PR = 1.36, 95% CI = 1.17-1.58) or in families with non-smoking parents (PR = 1.61, 95% CI = 1.01-2.56). Conversely, at follow-up socioeconomic disparities dropped since families with no graduate parents were 1.5-fold more likely to introduce a HSB between the two waves. The Italian ban on smoking in public places may have increased the adoption of smoke-free homes in families with smoking and non-graduate parents, causing the drop of the socioeconomic gap in smoke-free homes.