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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">The smoking behavior of friends&#44; peers and family members is an important predictor of tobacco use by adolescents&#46;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> Concomitantly&#44; it is widely acknowledged that tobacco consumption by parents is a risk factor for children&#180;s later smoking behavior&#46; In Portugal&#44; Law no&#46; 63&#47;2017 entered into force on January 1st 2018 and extended the smoking ban to outdoor locations attended by children &#40;e&#46;g&#46;&#44; children&#8217;s playgrounds&#41;&#46;<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a> This law is relevant not only to protect children from secondhand smoke exposure&#44; but also to decrease tobacco normalization&#46; This study aimed to describe tobacco-related variables &#40;e&#46;g&#46;&#44; persons smoking&#44; smell of tobacco smoke&#44; cigarette butts&#41; in children&#8217;s playgrounds before and after the implementation of this new Law&#44; considering the socioeconomic status &#40;SES&#41; of the neighborhood surrounding the playground&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">An observational study was developed in children&#8217;s playgrounds in the municipality of Braga &#40;Portugal&#41;&#44; between May and June 2017 &#40;before the law entered into force&#41;&#44; followed by two follow-ups carried out in the same months in 2018 and 2019 &#40;after the law entered into force&#41;&#46; This study followed the methodology of the TackSHS Project Consortium&#44; whose aims included the assessment of SHS exposure in children&#8217;s playgrounds in European countries&#46;<a class="elsevierStyleCrossRefs" href="#bib0015"><span class="elsevierStyleSup">3&#44;4</span></a> A convenience sample of 20 playgrounds was assembled&#46; Playgrounds were selected according to the neighborhoods&#8217; SES&#58; 9 were located in the most deprived urban areas &#40;low SES&#41; and 11 located in the most affluent ones &#40;high SES&#41;&#46; Neighborhood SES was established based on a deprivation index for Portugal&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> The number of playgrounds observed varied in each year due to temporary closures for maintenance&#46; Playgrounds were observed in similar weather conditions and each playground was observed for a period of 30<span class="elsevierStyleHsp" style=""></span>min&#46; The inclusion criterion was that a minimum of five people&#44; including children&#44; were inside the playground at the beginning of the observation&#44; regardless of the time or day of the week&#46; Most playgrounds were observed during weekends &#40;41 out of 57&#41; and in the afternoon &#40;51 out of 57&#41;&#46; On average each playground had a total of 9&#46;77 &#40;SD<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>5&#46;60&#41; people inside&#44; of which 5&#46;55 &#40;SD<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>4&#46;73&#41; were children&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">The researchers recorded the data on a grid developed based on the variables collected on the TackSHS project<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a>&#58; existence of persons smoking &#40;cigarettes and e-cigarettes&#47;heated tobacco products&#41; inside and around the playground &#40;&#60;1 meter&#41;&#59; presence of the smell of tobacco smoke&#59; presence of non-smoking signs&#59; and existence of cigarette butts on the floor inside and outside the playground&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">The associations between tobacco-related variables and the year of the observations or the neighborhoods&#8217; SES were calculated using a Chi-squared test for the categorial variables &#40;Fisher&#8217;s Exact test when the expected count in cells was lower than five&#41;&#46; The median differences were compared through a Kruskall&#8211;Wallis or Mann&#8211;Whitney Test&#44; as appropriate&#46; All analyses were performed with the IBM Statistical Package for the Social Sciences &#40;SPSS&#41; Statistics for Windows&#44; version 26&#46;0&#44; Armonk&#44; NY&#44; USA&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">The main results are presented in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46; There was a statistically significant decrease in the number of playgrounds with cigarette butts outside&#44; reducing from 20 in 2017 to 15 in 2018 &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;028&#41;&#46; However&#44; in 2019 this number increased to 19 playgrounds&#46; In 2017&#44; almost all the playgrounds had cigarette butts inside &#40;19&#47;20&#41;&#46; Although not statistically significant&#44; this number reduced to 15&#47;20 playgrounds in 2019&#44; and the median number of butts inside the playground reduced from 14&#46;00 &#40;P25-P75&#58; 4&#46;00&#8722;20&#46;00&#41; to 5&#46;00 &#40;P25-P75&#58; 1&#46;00&#8722;9&#46;00&#41;&#46; None of the playgrounds presented non-smoking signs and e-cigarette users were never observed&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0030" class="elsevierStylePara elsevierViewall">No statistically significant differences were found in the tobacco-related variables according to the playgrounds&#180; neighbourhood SES &#40;<a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#41;&#46; Notwithstanding&#44; the presence and the number of cigarette butts within the playgrounds were higher in deprived neighbourhoods&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia><p id="par0035" class="elsevierStylePara elsevierViewall">This was the first study developed in Portugal collecting tobacco-related variables in children&#8217;s playgrounds and analyzing its change over a two-year period during the enforcement of a new smoking ban law&#46; This study showed that there is evidence of smoking in playgrounds in the municipality of Braga&#44; which indicates that children continue to be exposed to smoking behavior and secondhand smoking in these places&#46; Although some reduction was found in the number of butts outside the playgrounds&#44; this study revealed a generalized non-compliance with the smoking ban&#44; shown in the number of butts found both inside and outside the playgrounds&#44; as well as in the total absence of signs informing about the smoking prohibition&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The low number of cases in our sample may have hindered the statistical power needed to find statistically significant results&#44; being relevant the development of studies with larger samples and in different regions of the country&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">In summary&#44; better enforcement of the new law is required&#46; Town Halls should take the necessary actions to promote health education in communities and protect children from the exposure to smoking behavior&#46;</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Authors&#8217; contributions</span><p id="par0050" class="elsevierStylePara elsevierViewall">The study was designed by J&#46; Precioso&#44; M&#46;J&#46; L&#243;pez&#44; X&#46; Continente and E&#46; Fernandez&#46; Data was collected by C&#46; Samorinha and V&#46;H&#46; Oliveira&#46; J&#46; Precioso and C&#46; Samorinha designed and carried out statistical analysis and wrote the first draft of the letter&#46; All authors gave a substantial contribution to the interpretation of data&#44; critical discussion and revision of the manuscript&#44; and approved its final version&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Funding</span><p id="par0055" class="elsevierStylePara elsevierViewall">The data from 2017 presented in this letter has received funding from the <span class="elsevierStyleGrantSponsor" id="gs0005">European Union&#8217;s Horizon</span> 2020 research and innovation program under grant agreement No <span class="elsevierStyleGrantNumber" refid="gs0005">681040</span>&#46; It was also supported by the <span class="elsevierStyleGrantSponsor" id="gs0010">Ministry of Universities and Research of Catalonia &#40;AGAUR&#41;</span> under grant 2017 <span class="elsevierStyleGrantNumber" refid="gs0010">SGR 1526 &#40;MJL&#44; XC&#41;</span> and <span class="elsevierStyleGrantNumber" refid="gs0010">2017SGR319 &#40;EF&#41;</span>&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Protection of human and animal subjects</span><p id="par0060" class="elsevierStylePara elsevierViewall">The authors declare that no experiments were performed on humans or animals for this study&#46;</p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Confidentiality of data</span><p id="par0065" class="elsevierStylePara elsevierViewall">The authors declare that the procedures followed were in accordance with the regulations established by the Commission for Clinical and Ethical Research and in accordance with the Helsinki Declaration of the World Medical Association&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Right to privacy and informed consent</span><p id="par0070" class="elsevierStylePara elsevierViewall">No individual data was retrieved from participants&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0030">Conflict of interest</span><p id="par0075" class="elsevierStylePara elsevierViewall">The authors declare they have no conflicts of interest&#46;</p></span></span>"
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          "leyenda" => "<p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Note&#58; SD&#44; standard deviation&#59; n&#46;a&#46;&#44; not applicable&#46;</p>"
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                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">Variables&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">2017&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">2018&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t" scope="col">2019&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t\t\t</th><th class="td" title="\n
                  \t\t\t\t\ttable-head\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t" scope="col"><span class="elsevierStyleItalic">p-</span>value<a class="elsevierStyleCrossRef" href="#tblfn0025">&#42;</a>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">N<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>20<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">N<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>18<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t" scope="col" style="border-bottom: 2px solid black">N<span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>19<a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t"><span class="elsevierStyleItalic">n</span> &#40;&#37;&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Smell of smoke&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">1 &#40;5&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">1 &#40;5&#46;6&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0&#46;603<a class="elsevierStyleCrossRef" href="#tblfn0015"><span class="elsevierStyleSup">c</span></a>&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
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                  \t\t\t\t">Smoking sign&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0 &#40;0&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0 &#40;0&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t">0 &#40;0&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">n&#46;a&#46;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Smoking inside&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">2 &#40;10&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
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                  \t\t\t\t">1 &#40;5&#46;3&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;643<a class="elsevierStyleCrossRef" href="#tblfn0015"><span class="elsevierStyleSup">c</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Smoking outside<a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">b</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">3 &#40;15&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0 &#40;0&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">2 &#40;10&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;310<a class="elsevierStyleCrossRef" href="#tblfn0015"><span class="elsevierStyleSup">c</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">e-cigarette&#47;heated tobacco users&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">0 &#40;0&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
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                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0 &#40;0&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0 &#40;0&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t">n&#46;a&#46;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Butts inside&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">19 &#40;95&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">17 &#40;94&#46;4&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15 &#40;78&#46;9&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;298<a class="elsevierStyleCrossRef" href="#tblfn0015"><span class="elsevierStyleSup">c</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Butts outside<a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">b</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20 &#40;100&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">15 &#40;83&#46;3&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">19 &#40;100&#46;0&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
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                  \t\t\t\t"><span class="elsevierStyleBold">0&#46;028</span><a class="elsevierStyleCrossRef" href="#tblfn0015"><span class="elsevierStyleSup">c</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " colspan="3" align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t"><span class="elsevierStyleItalic">Median</span> &#40;P25-P75&#41;</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Butts inside&#44; <span class="elsevierStyleItalic">number</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">14&#46;00 &#40;4&#46;00&#8211;20&#46;00&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&#46;00 &#40;3&#46;00&#8211;12&#46;75&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">5&#46;00 &#40;1&#46;00&#8211;9&#46;00&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">0&#46;083<a class="elsevierStyleCrossRef" href="#tblfn0020"><span class="elsevierStyleSup">d</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t ; entry_with_role_rowhead " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">Butts outside&#44; <span class="elsevierStyleItalic">number</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
                  \t\t\t\t\ttable-entry\n
                  \t\t\t\t  " align="left" valign="\n
                  \t\t\t\t\ttop\n
                  \t\t\t\t">20&#46;00 &#40;12&#46;50&#8211;20&#46;00&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="\n
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                  "referenciaCompleta" => "Government of Portugal&#46; Law no&#46;63&#47;2017&#44; from 3rd August&#46; Di&#225;rio da Rep&#250;blica&#44; 1st Series&#44; 149&#58;4455-4477&#46; 2017&#46;"
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Vol. 27. Issue 4.
Pages 373-375 (July - August 2021)
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Vol. 27. Issue 4.
Pages 373-375 (July - August 2021)
Letter to the Editor
Open Access
Assessment of compliance with the smoking ban in children’s playgrounds in Portugal: a case study
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José Preciosoa,
Corresponding author
precioso@ie.uminho.pt

Corresponding author.
, Catarina Samorinhab, Vitor Hugo Oliveiraa, Maria José Lópezc,d,e, Xavier Continentec,d,e, Esteve Fernandezf,g
a CIEC – Research Centre on Child Studies, University of Minho, Campus de Gualtar 4710-057 Braga, Portugal
b Sharjah Institute for Medical Research, University of Sharjah, Sharjah, United Arab Emirates
c Agència de Salut Pública de Barcelona (ASPB), Barcelona, Spain
d CIBER de Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
e Institut d'Investigació Biomèdica de Sant Pau (IIB Sant Pau), Barcelona, Spain
f Institut Català d'Oncologia - Institut d'Investigació Biomèdica de Bellvitge; School of Medicine and Health Sciences, Universitat de Barcelona, Barcelona, Spain
g CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain
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Tables (2)
Table 1. Tobacco-related variables in children’s playgrounds in the municipality of Braga, Portugal, by year.
Table 2. Tobacco-related variables in children’s playgrounds in the municipality of Braga, Portugal, according to SES.
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The smoking behavior of friends, peers and family members is an important predictor of tobacco use by adolescents.1 Concomitantly, it is widely acknowledged that tobacco consumption by parents is a risk factor for children´s later smoking behavior. In Portugal, Law no. 63/2017 entered into force on January 1st 2018 and extended the smoking ban to outdoor locations attended by children (e.g., children’s playgrounds).2 This law is relevant not only to protect children from secondhand smoke exposure, but also to decrease tobacco normalization. This study aimed to describe tobacco-related variables (e.g., persons smoking, smell of tobacco smoke, cigarette butts) in children’s playgrounds before and after the implementation of this new Law, considering the socioeconomic status (SES) of the neighborhood surrounding the playground.

An observational study was developed in children’s playgrounds in the municipality of Braga (Portugal), between May and June 2017 (before the law entered into force), followed by two follow-ups carried out in the same months in 2018 and 2019 (after the law entered into force). This study followed the methodology of the TackSHS Project Consortium, whose aims included the assessment of SHS exposure in children’s playgrounds in European countries.3,4 A convenience sample of 20 playgrounds was assembled. Playgrounds were selected according to the neighborhoods’ SES: 9 were located in the most deprived urban areas (low SES) and 11 located in the most affluent ones (high SES). Neighborhood SES was established based on a deprivation index for Portugal.5 The number of playgrounds observed varied in each year due to temporary closures for maintenance. Playgrounds were observed in similar weather conditions and each playground was observed for a period of 30min. The inclusion criterion was that a minimum of five people, including children, were inside the playground at the beginning of the observation, regardless of the time or day of the week. Most playgrounds were observed during weekends (41 out of 57) and in the afternoon (51 out of 57). On average each playground had a total of 9.77 (SD=5.60) people inside, of which 5.55 (SD=4.73) were children.

The researchers recorded the data on a grid developed based on the variables collected on the TackSHS project4: existence of persons smoking (cigarettes and e-cigarettes/heated tobacco products) inside and around the playground (<1 meter); presence of the smell of tobacco smoke; presence of non-smoking signs; and existence of cigarette butts on the floor inside and outside the playground.

The associations between tobacco-related variables and the year of the observations or the neighborhoods’ SES were calculated using a Chi-squared test for the categorial variables (Fisher’s Exact test when the expected count in cells was lower than five). The median differences were compared through a Kruskall–Wallis or Mann–Whitney Test, as appropriate. All analyses were performed with the IBM Statistical Package for the Social Sciences (SPSS) Statistics for Windows, version 26.0, Armonk, NY, USA.

The main results are presented in Table 1. There was a statistically significant decrease in the number of playgrounds with cigarette butts outside, reducing from 20 in 2017 to 15 in 2018 (p=0.028). However, in 2019 this number increased to 19 playgrounds. In 2017, almost all the playgrounds had cigarette butts inside (19/20). Although not statistically significant, this number reduced to 15/20 playgrounds in 2019, and the median number of butts inside the playground reduced from 14.00 (P25-P75: 4.00−20.00) to 5.00 (P25-P75: 1.00−9.00). None of the playgrounds presented non-smoking signs and e-cigarette users were never observed.

Table 1.

Tobacco-related variables in children’s playgrounds in the municipality of Braga, Portugal, by year.

Variables  2017  2018  2019  p-value* 
  N=20a  N=18a  N=19a   
    n (%)     
Smell of smoke  3 (15.0)  1 (5.6)  1 (5.6)  0.603c 
Smoking sign  0 (0.0)  0 (0.0)  0 (0.0)  n.a. 
Smoking inside  2 (10.0)  0 (0.0)  1 (5.3)  0.643c 
Smoking outsideb  3 (15.0)  0 (0.0)  2 (10.0)  0.310c 
e-cigarette/heated tobacco users  0 (0.0)  0 (0.0)  0 (0.0)  n.a. 
Butts inside  19 (95.0)  17 (94.4)  15 (78.9)  0.298c 
Butts outsideb  20 (100.0)  15 (83.3)  19 (100.0)  0.028c 
  Median (P25-P75) 
Butts inside, number  14.00 (4.00–20.00)  5.00 (3.00–12.75)  5.00 (1.00–9.00)  0.083d 
Butts outside, number  20.00 (12.50–20.00)  20.00 (6.50-20.00)  20.00 (12.00–20.00)  0.701d 

Note: SD, standard deviation; n.a., not applicable.

a

The number of playgrounds observed varied in each year due to temporary closure for works of some of them.

b

Just around the playground area at a maximum distance of 1 meter.

c

Fisher’s Exact Test.

d

Kruskal–Wallis Test.

*

p < 0.05.

No statistically significant differences were found in the tobacco-related variables according to the playgrounds´ neighbourhood SES (Table 2). Notwithstanding, the presence and the number of cigarette butts within the playgrounds were higher in deprived neighbourhoods.

Table 2.

Tobacco-related variables in children’s playgrounds in the municipality of Braga, Portugal, according to SES.

  Smell of smoke  Smoking inside  Smoking outside  Butts inside  Butts outside  Number butts inside  Number butts outside 
    n (%)Median (P25-P75)
SES                 
High  32  4 (12.5)  1 (3.1)  1 (7.0)  28 (87.5)  29 (90.6)  5.00 (5.00−10.50)  20.00 (9.75−20.00) 
Low  25  1 (4.0)  2 (8.0)  23 (92.0)  25 (100.0)  11.00 (3.50−19.50)  20.00(16.50−20.00) 
p-value    0.372a  0.576a  0.123a  0.686a  0.248a  0.067b  0.177b 

Note: SES, socioeconomic status.

a

Fisher’s Exact Test.

b

Mann–Whitney Test.

This was the first study developed in Portugal collecting tobacco-related variables in children’s playgrounds and analyzing its change over a two-year period during the enforcement of a new smoking ban law. This study showed that there is evidence of smoking in playgrounds in the municipality of Braga, which indicates that children continue to be exposed to smoking behavior and secondhand smoking in these places. Although some reduction was found in the number of butts outside the playgrounds, this study revealed a generalized non-compliance with the smoking ban, shown in the number of butts found both inside and outside the playgrounds, as well as in the total absence of signs informing about the smoking prohibition.

The low number of cases in our sample may have hindered the statistical power needed to find statistically significant results, being relevant the development of studies with larger samples and in different regions of the country.

In summary, better enforcement of the new law is required. Town Halls should take the necessary actions to promote health education in communities and protect children from the exposure to smoking behavior.

Authors’ contributions

The study was designed by J. Precioso, M.J. López, X. Continente and E. Fernandez. Data was collected by C. Samorinha and V.H. Oliveira. J. Precioso and C. Samorinha designed and carried out statistical analysis and wrote the first draft of the letter. All authors gave a substantial contribution to the interpretation of data, critical discussion and revision of the manuscript, and approved its final version.

Funding

The data from 2017 presented in this letter has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No 681040. It was also supported by the Ministry of Universities and Research of Catalonia (AGAUR) under grant 2017 SGR 1526 (MJL, XC) and 2017SGR319 (EF).

Protection of human and animal subjects

The authors declare that no experiments were performed on humans or animals for this study.

Confidentiality of data

The authors declare that the procedures followed were in accordance with the regulations established by the Commission for Clinical and Ethical Research and in accordance with the Helsinki Declaration of the World Medical Association.

Right to privacy and informed consent

No individual data was retrieved from participants.

Conflict of interest

The authors declare they have no conflicts of interest.

References
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J. Precioso, M. Macedo, L. Rebelo.
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Tackling second-hand exposure to tobacco smoke and aerosols of electronic cigarettes: the TackSHS project protocol.
Gac Sanit., 34 (2020), pp. 77-82
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E. Henderson, X. Continente, E. Fernández, O. Tigova, N. Cortés-Francisco, S. Gallus, et al.
Secondhand smoke exposure in outdoor children’s playgrounds in 11 European countries.
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E. Guillaume, C. Pornet, O. Dejardin, L. Launay, R. Lillini, M. Vercelli, et al.
Development of a cross-cultural deprivation index in five European countries.
J Epidemiol Community Health, 70 (2016), pp. 493-499
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