Background: It is difficult to obtain good food reports with Food Frequency Questionnaires (FFQ) among children. In addition, validated questionnaires are scarce. Objective: The aim of this study was to validate the 'POIBA-How do we eat?' (POIBA-HDWE) FFQ and whether it could be administered to children under 10 years of age. Design: We validated the FFQ POIBA-HDWE as part of the Childhood Obesity Prevention Program (POIBA project) in Barcelona. Forty-two out of 63 primary school students (9-10 years old) answered three questionnaires: FFQ POBA-HDWE; another questionnaire, 'POIBA-How do our children eat?' (POIBA-HDOCE), which was administered to the children's parents; and the 24-h recall computer program 'Young Adolescents' Nutrition Assessment on Computer' (YANA-C), which was used on three different days as a gold standard. We tested for correlations using the Spearman test for non-parametric variables. Results: We found low compliance with food recommendations (<50%). The POIBA-HDWE and POIBA-HDOCE questionnaires showed a moderate correlation for soft drinks (r = 0.49; p < 0.01), nuts (r = 0.59; p < 0.01), dairy products (r = 0.41; p < 0.01) and juices (r = 0.49; p < 0.01). There were moderate correlations between POIBA-HDWE and YANA-C for fried potatoes (r = 0.42; p = 0.01), dairy products (r = 0.53; p < 0.01), juices (r = 0.41; p < 0.01), and grains(r = 0.50; p < 0.01). Food frequency questions showed a homogeneity of 0.69, and a sensitivity of over 60% for all food items except chips (37.5%) and sweets (51.7%). Conclusions: The POIBA-HDWE FFQ showed moderate correlations with the gold standard, high sensitivity for most food types and acceptable internal consistency. It is an easy and affordable tool for recording food frequency in children under 10 years old.

The aim was to assess the validity of self-reported exposure to second-hand smoke (SHS) in 50 hospitality venues of Madrid (Spain) in 2010, taking as a reference vapour-phase nicotine measured by active sampling. The questions posed in the questionnaire permitted distinguishing between the different levels of SHS. However, the moderate relationship found (Spearman׳s correlation=0.387, p<0.001) suggests that intensity of exposure to SHS in hospitality venues, based solely on self-reported information, should be used with caution.

AIM:To analyse the association between tobacco smoking, exposure to second-hand smoke (SHS) and reports of wheezing and asthma in a sample of schoolchildren. METHODS:A structured questionnaire was administered to 1766 students (7th grade, aged 12-13 years) at 25 schools in Terrassa, Spain (2006). We determined the prevalence of active smoking, exposure to SHS and reports of wheezing and asthma, and their association by means of prevalence odds ratios (OR) and 95% confidence intervals (CI). RESULTS:97.5% of children were nonsmokers, 1.5% were experimental smokers and 1% were regular smokers. 41.1% of children reported exposure to SHS at home, 40.0% at school, 53.9% in their leisure time and 33.2% while using private or public transportation. Wheezing was reported by 9.2% of children, and 9.2% reported asthma. A significant association was found between smoking tobacco and wheezing: OR in experimental smokers = 3.0 (95% CI 1.2-7.7), and OR in active smokers = 4.2 (95% CI 1.4-12.5). Exposure to SHS while using transportation was associated with wheezing (OR = 1.4; 95% CI 1.0-2.0). Tobacco smoking and exposure to SHS were not associated with asthma. CONCLUSION:Active and experimental smokers, and those who reported exposure to SHS while using public or private transportation, had higher likelihood of reporting wheezing. No association between active or passive smoking and asthma was observed.

To analyse the association between tobacco smoking, exposure to second-hand smoke (SHS) and reports of wheezing and asthma in a sample of schoolchildren. A structured questionnaire was administered to 1766 students (7th grade, aged 12–13 years) at 25 schools in Terrassa, Spain (2006). We determined the prevalence of active smoking, exposure to SHS and reports of wheezing and asthma, and their association by means of prevalence odds ratios (OR) and 95% confidence intervals (CI). 97.5% of children were nonsmokers, 1.5% were experimental smokers and 1% were regular smokers. 41.1% of children reported exposure to SHS at home, 40.0% at school, 53.9% in their leisure time and 33.2% while using private or public transportation. Wheezing was reported by 9.2% of children, and 9.2% reported asthma. A significant association was found between smoking tobacco and wheezing: OR in experimental smokers = 3.0 (95% CI 1.2–7.7), and OR in active smokers = 4.2 (95% CI 1.4–12.5). Exposure to SHS while using transportation was associated with wheezing (OR = 1.4; 95% CI 1.0–2.0). Tobacco smoking and exposure to SHS were not associated with asthma. Active and experimental smokers, and those who reported exposure to SHS while using public or private transportation, had higher likelihood of reporting wheezing. No association between active or passive smoking and asthma was observed.

The aim of this study was to assess the relationship between particulate matter of diameter≤2.5 µm (PM2.5) and airborne nicotine concentration as markers of second-hand smoke exposure with respect to the setting studied, the intensity of exposure, and the type of environment studied (indoors or outdoors). Data are derived from two independent studies that simultaneously measured PM2.5 and nicotine concentrations in the air as airborne markers of second-hand smoke exposure in public places and workplaces, including health care centres, bars, public administration offices, educational centres, and transportation. We obtained 213 simultaneous measures of airborne nicotine and PM2.5. Nicotine in the air was measured with active samplers containing a sodium bisulphate-treated filter that was analysed by gas chromatography/mass spectrometry. PM2.5 was measured with a SidePak AM510 Personal Aerosol Monitor. We calculated Spearman's rank correlation coefficient and its 95% confidence intervals (95% CI) between both measures for overall data and stratified by setting, type of environment (indoors/outdoors), and intensity of second-hand smoke exposure (low/high, according to the global median nicotine concentration). We also fitted generalized regression models to further explore these relationships. The median airborne nicotine concentration was 1.36 µg/m3, and the median PM2.5 concentration was 32.13 µg/m3. The overall correlation between both markers was high (Spearman's rank correlation coefficient=0.709; 95% CI: 0.635-0.770). Correlations were higher indoors (Spearman's rank correlation coefficient=0.739; 95% CI: 0.666-0.798) and in environments with high second-hand smoke exposure (Spearman's rank correlation coefficient=0.733; 95% CI: 0.631-0.810). The multivariate analysis adjusted for type of environment and intensity of second-hand smoke exposure confirmed a strong relationship (7.1% increase in geometric mean PM2.5 concentration per µg/m3 nicotine concentration), but only in indoor environments in a stratified analysis (6.7% increase; 95% CI: 4.3-9.1%). Although the overall correlation between airborne nicotine and PM2.5 is high, there is some variability regarding the type of environment and the intensity of second-hand smoke exposure. In the absence of other sources of combustion, air nicotine and PM2.5 measures can be used indoors, while PM2.5 should be used outdoors with caution.

Objective. To assess the effectiveness of a multi-level (individual, family, and school) school-based intervention to prevent the exposure to secondhand smoke (SHS) in a population of schoolchildren (12-14 years old).Method. This was a community trial with cluster randomization of schools to an intervention and comparison group (ClinicalTrials.Gov identifier NCT01881607). The intervention targeted schoolchildren in Terrassa (Catalonia, Spain). We assessed SHS exposure in different settings and tobacco consumption by means of a questionnaire before and one year after the intervention.Results. We analyzed data from 1734 students with both baseline and follow-up data. The crude analysis showed that SHS exposure among students in the intervention group significantly decreased at school (-14.0%), at home (-19.9%), and on transportation (-21.8%). In the comparison group, SUS exposure significantly decreased only at home (-16.9%). After adjustment for potential confounders, the good accomplishment of the activities showed a possible trend towards a non-significant reduction in exposure at home, transportation, and leisure time.Conclusion. While this school-based multi-level intervention had no overall effect in SHS exposure, the improvement of the activities focused on preventing SHS would be needed in order to achieve a significant decrease in the proportion of children exposed to SHS. (C) 2013 Elsevier Inc All rights reserved.

BACKGROUND:Numerous studies have assessed second-hand smoke (SHS) exposure but a gold standard remains to be established. This study aimed to review how SHS exposure has been assessed in adults in questionnaire-based epidemiological studies.METHODS:A literature search of original papers in English, French, Italian or Spanish published from January 2000 to May 2011 was performed using PubMed. The variables recorded for each study included target population, sample size, validation of the SHS questions, study design and phrasing of every question used to assess SHS exposure. For each item, information such as the setting where exposure was assessed or the indicator used to ascertain SHS exposure was extracted.RESULTS:We retrieved 977 articles, of which 335 matched the inclusion criteria. The main objective of 75.8% of the studies was to assess SHS exposure.The proportion of validated questions aiming to ascertain SHS exposure was 17.9%. Most studies collected data only for one (40.3%) or two settings (33.4%), most frequently the home (83.9%) and workplace (57%). The most commonly used indicator to ascertain exposure was the presence of smokers and 68.9% of the studies included an item to assess the intensity of SHS exposure.CONCLUSIONS:The variability in the indicators and items used to ascertain SHS exposure is very high, whereas the use of items derived from validated studies remains low. Identifying the diverse settings where SHS exposure may occur is essential to accurately assess exposure over time. A standard set of items to identify SHS exposure in distinct settings is needed.

El objetivo de este trabajo es describir las diferencias en la exposiciónal humo ambiental del tabaco (HAT) en el hogar y el tiempo libre segúnel día de la semana (laborable y no laborable) en que se produce laexposición en Barcelona. Se realizó un estudio transversal de una muestrarepresentativa de la población adulta (>16 años) no fumadora de laciudad de Barcelona durante los años 2004-2005 antes de la entrada envigor de la ley 28/2005 de medidas sanitarias frente al tabaquismo. Seestudió la prevalencia de exposición al HAT en el hogar y en el tiempolibre mediante cuestionario y mediante biomarcador (cotinina en saliva).Las preguntas del cuestionario diferenciaron la exposición al HAT según eldía de la semana (laborable y no laborable). La prevalencia de exposiciónal HAT en el hogar fue del 27,4% (6,8% expuestos sólo los días laborables,5,7% expuestos sólo los días no laborables y 14,9% expuestos los díaslaborables y no laborables). La prevalencia de exposición al HAT en eltiempo libre fue del 61,3% (10,7% expuestos sólo los días laborables,13,6% expuestos sólo los días no laborables y 37,0% expuestos losdías laborables y no laborables). La exposición al HAT sólo en días nolaborables en el tiempo libre desciende con la edad (χ2 de tendencia=183,7; p<0,001) y aumenta con el nivel de estudios (χ2 de tendencia=78,8; p<0,001). Las personas que declararon estar expuestas al HAT enel hogar entre en días laborables y no laborables presentaron niveles decotinina en saliva más elevados, independientemente del sexo, grupo deedad y nivel de estudios. En conclusión, la exposición al HAT se produceprincipalmente durante el tiempo libre. Las preguntas sobre la exposiciónsegún días laborables y no laborables permiten caracterizar la exposiciónal HAT, especialmente cuando la exposición ocurre en el tiempo libre.

The objective of this study is to describe the differences in the exposure to secondhand smoke (SHS) at home and at leisure time according to the day of the week (working and non-working day) which exposure occurs in Barcelona. We carried out a cross-sectional study of a representative sample of adult (>16 years) non-smokers in Barcelona before the Spanish smoking law came into effect (years 2004-2005). We studied the prevalence of exposure to SHS at home and leisure time by means of a questionnaire and a biomarker (salivary cotinine). The questionnaire included questions on exposure to SHS on working days and nonworking days. The prevalence of exposure to SHS at home was 27.4% (6.8% exposed only on working days, 5.7% exposed only on non-working days, and 14.9% exposed on both working and non-working days). The prevalence of exposure to SHS at leisure time was 61.3% (10.7% exposed only on working days, 13.6% exposed only on non-working days, and 37.0% exposed on both working and non-working days). The exposure to SHS only on non-working days at leisure time decreases with age (χ(2) of trend = 183.7; p<0.001) and increases with the educational level (χ(2) of trend = 78.8; p<0.001). Participants who had reported to be exposed to SHS at home on working and non-working days showed higher levels of salivary cotinine concentration, regardless of sex, age group, and educational level. In conclusion, the exposure to SHS occurs mainly during leisure time. Questions on SHS exposure according to working and non-working days allow to characterizing the exposure to SHS, especially when the exposure occurs at leisure time.

Predicting failure in a composite can be performed using ply level mechanisms and/or micro level mechanisms. This paper uses the generalized method of cells and high-fidelity generalized method of cells micromechanics theories, coupled with classical lamination theory, to study progressive damage in composites. Different failure theories, implemented at the fiber and matrix constituent level within a laminate, are investigated. A comparison is made among maximum stress, maximum strain, Tsai-Hill, and Tsai-Wu failure theories. To verify the failure theories, the Worldwide Failure Exercise experiments are used. The Worldwide Failure Exercise is a comprehensive study that covers a wide range of polymer matrix composite laminates. The objectives of this paper are to evaluate the current predictive capabilities of the generalized method of cells and high-fidelity generalized method of cells micromechanics theories for the progressive failure prediction of polymer matrix composite laminates and to evaluate the influence of four failure criteria applied at the fiber/matrix constituent scale. The numerical results demonstrate overall agreement with the experimental results for most of the composite layups examined, but also point to the need for more accurate resin damage progression models.

INTRODUCTIONThe Spanish tobacco control law of 2006 was modified in January 2011, banning smoking in all hospitality venues. The objective of the study was to assess the impact of the 2011 Spanish smoking ban on secondhand smoke (SHS) exposure in hospitality venues, and to analyze the potential impact of outdoor smokers close to entrances on indoor SHS levels after the law came into force.METHODSBefore-and-after evaluation study with repeated measures. The study was carried out in three regions of Spain (Catalonia, Galicia, and Madrid) and included a random sample of 178 hospitality venues. We measured vapor-phase nicotine and particulate matter 2.5 micrometers or less in diameter (PM2.5) as SHS markers at baseline (November-December 2010) and at follow-up (April-June 2011). We also recorded tobacco consumption variables such as the presence of butts, ashtrays, and smokers. In the posttest assessment, we also recorded the number of outdoor smokers close to the entrance.RESULTSA total of 351 nicotine and 160 PM2.5 measurements were taken. Both nicotine and PM2.5 concentrations decreased by more than 90% (nicotine from 5.73 to 0.57 µg/m(3), PM2.5 from 233.38 to 18.82 µg/m(3)). After the law came into force, both nicotine and PM2.5 concentrations were significantly higher in venues with outdoor smokers close to the entrance than in those without outdoor smokers. All the observational tobacco consumption variables significantly decreased (p < .001).CONCLUSIONSSHS exposure in hospitality venues dramatically decreased after the 2011 Spanish smoking ban. SHS from outdoor smokers close to entrances seems to drift inside venues. Smoking control legislation should consider outdoor restrictions to ensure complete protection against SHS.

Composite materials are widely used in many applications for their high strength, low weight, and tailorability for specific applications. However, the development of robust and reliable methodologies to detect micro level damage in composite structures has been challenging. For composite materials, attenuation of ultrasonic waves propagating through the media can be used to determine damage within the material. Currently available numerical solutions for attenuation induce arbitrary damage, such as fiber-matrix debonding or inclusions, to show variations between healthy and damaged states. This paper addresses this issue by integrating a micromechanics analysis to simulate damage in the form of a fiber-matrix crack and an analytical model for calculating the attenuation of the waves when they pass through the damaged region. The hybrid analysis is validated by comparison with experimental stress-strain curves and piezoelectric sensing results for attenuation measurement. The results showed good agreement between the experimental stress-strain curves and the results from the micromechanics analysis. Wave propagation analysis also showed good correlation between simulation and experiment for the tested frequency range.

There is scant information on nicotine dependence in smokers not seeking cessation treatment. This study analyses the relationship between nicotine dependence, measured by the Fagerström Test for Nicotine Dependence (FTND), and salivary cotinine concentration in a sample of smokers from the general population. We conducted a cross-sectional study (2004-2005) of a representative sample of the general population of Barcelona, Spain (n=1245). The analysis included 196 daily smokers aged more than 16 years. Information on smoking was obtained by questionnaire and cotinine concentration was determined in saliva. Geometric means of cotinine concentration by every single FTND item were computed, and multivariate linear regression was used to explore the relationship among these variables. Participants smoked a mean of 17.0 cigarettes per day, and the mean FTND score was 3.27 (95% confidence interval: 2.92-3.61). Around 17% of subjects (95% confidence interval: 12.0-22.5%) had high nicotine dependence. Cotinine concentration differed significantly by nicotine dependence levels. In a multiple linear regression model including the sum of the FTND items 2, 3, and 6, and the single FTND items 1, 4, and 5, adjusted for sex, the time to first cigarette after waking up (item 1), the number of cigarettes smoked daily (item 4), and smoking more in the first hours of the day (item 5) were significantly related to salivary cotinine concentration (R(2)=0.414). Salivary cotinine levels were associated with nicotine dependence as measured by the FTND, especially with the items on daily tobacco consumption, time to first cigarette after waking up, and smoking more in the first hours of the day.

Introducción: En los últimos años, las encuestas de salud y los estudios epidemiológicos sobre el tabaquismo han incorporado preguntas sobre la exposición al humo ambiental de tabaco, aunque no existe un cuestionario estandarizado. Métodos: Entre enero y mayo de 2008 se revisaron las encuestas que contenían preguntas sobre exposición a tabaquismo pasivo realizadas en España desde las administraciones públicas, las sociedades científicas y organismos de investigación. Se han revisado los literales, que se han clasificado según tipo de estudio, población diana, ámbito geográfico y lugar de exposición. Resultados: Se identificaron 27 encuestas que incluían tabaquismo pasivo. La mayoría correspondían a encuestas de salud (81,5%) e iban dirigidas a población general (70,4%). El ámbito geográfico más común era el autonómico (48,1%) y el lugar de exposición más común el hogar (88,9%). Discusión: Los resultados muestran una enorme variabilidad en las preguntas utilizadas. Es necesario homogeneizar las preguntas sobre exposición al tabaquismo pasivo si queremos comparar los resultados.Introduccion: In the last few years, health surveys and epidemiological studies on smoking have introduced questions on environmental tobacco smoke (ETS) exposure. However, a standardized questionnaire is lacking. Methods: Between January and May 2008, we reviewed surveys containing items on ETS exposure carried out in Spain by public administrations, scientific societies and research institutes. The wording of the questions was reviewed and classified according to the study type, target population, geographical setting and place of exposure. Results: We identified 27 surveys that included questions on passive smoking. Most were health surveys (81.5%) and were aimed at the general population (70.4%). The most frequent geographical setting consisted of autonomous regions (48.1%) and the most common place of exposure was the home (88.9%) Discussion: The results show wide variability in the questions used. Questionnaire items on ETS exposure should be homogenized to allow comparison of the results of surveys.

Tobacco control policies have undergone a major boost in terms of protecting people from involuntary exposure to environmental tobacco smoke, but less progress has been made in the denormalization of smoking behaviour. We describe an experience focused on the educational environment, which included marking the waiting areas (streets) of primary schools in the city of Terrassa as «Smoke-free environments». We placed a placard with the inscription «Smoke-free environment. We educate together» on the front of 50 out of 54 primary schools in the city. The proposal was well accepted. Our experience highlights the possibility of carrying out actions, based on local initiatives, that help to denormalize smoking without the need for legislative enforcement.

Tobacco control policies have undergone a major boost in terms of protecting people from involuntary exposure to environmental tobacco smoke, but less progress has been made in the denormalization of smoking behaviour. We describe an experience focused on the educational environment, which included marking the waiting areas (streets) of primary schools in the city of Terrassa as "Smoke-free environments". We placed a placard with the inscription "Smoke-free environment. We educate together" on the front of 50 out of 54 primary schools in the city. The proposal was well accepted. Our experience highlights the possibility of carrying out actions, based on local initiatives, that help to denormalize smoking without the need for legislative enforcement. (C) 2010 SESPAS. Published by Elsevier Espana, S.L. All rights reserved.

Las políticas de control del tabaquismo han vivido un importante impulso en cuanto a la protección de la población frente a la exposición involuntaria al humo ambiental de tabaco, pero estos avances han sido menores en lo que se refiere a la desnormalización de la conducta de fumar. Se describe una experiencia de sensibilización dirigida al ámbito escolar (especialmente a padres y madres), que incluye la señalización de los espacios de entrada y salida (vía pública) de los centros de educación primaria de la ciudad de Terrassa como «entornos sin humo». Se colocó un cartel con la inscripción «Entorno sin humo. Educamos entre todos» en la fachada de 50 de los 54 centros de educación primaria de la ciudad. Se constató una muy buena aceptación de la propuesta. Nuestra experiencia pone de relieve la posibilidad de llevar a cabo, desde la iniciativa local, acciones que ayuden a desnormalizar el consumo de tabaco sin necesidad de recurrir al desarrollo normativo.Tobacco control policies have undergone a major boost in terms of protecting people from involuntary exposure to environmental tobacco smoke, but less progress has been made in the denormalization of smoking behaviour. We describe an experience focused on the educational environment, which included marking the waiting areas (streets) of primary schools in the city of Terrassa as «Smoke-free environments». We placed a placard with the inscription «Smoke-free environment. We educate together» on the front of 50 out of 54 primary schools in the city. The proposal was well accepted. Our experience highlights the possibility of carrying out actions, based on local initiatives, that help to denormalize smoking without the need for legislative enforcement.