Early life exposure to secondhand tobacco smoke and eating behaviors at age 12 years.

BACKGROUND: Prenatal or early childhood secondhand tobacco smoke (SHS) exposure increases obesity risk. However, the potential mechanisms underlying this association are unclear, but obesogenic eating behaviors are one pathway that components of SHS could perturb. Our aim was to assess associations of prenatal and early childhood SHS exposure with adolescent eating behaviors. METHODS: Data came from a prospective pregnancy and birth cohort (N = 207, Cincinnati, OH). With multiple informant models, we estimated associations of prenatal (mean of 16 and 26 weeks of gestation maternal serum cotinine concentrations) and early childhood cotinine (average concentration across ages 12, 24, 36, and 48 months) with eating behaviors at age 12 years (Child Eating Behaviors Questionnaire). We tested whether associations differed by exposure periods and adolescent's sex. Models adjusted for maternal and child covariates. RESULTS: We found no statistically significant associations between cotinine measures and adolescent's eating behaviors. Yet, in females, prenatal cotinine was associated with greater food responsiveness (ß: 0.23; 95% CI: 0.08, 0.38) and lower satiety responsiveness (ß: -0.14; 95% CI: -0.26, -0.02); in males, prenatal and postnatal cotinine was related to lower food responsiveness (prenatal: ß: -0.25; 95% CI: -0.04, -0.06; postnatal: ß: -0.36; 95% CI: -0.06, -0.11). No significant effect modification by sex or exposure window was found for other eating behaviors. CONCLUSION: Prenatal and early childhood SHS exposures were not related to adolescent's eating behavior in this cohort; however, biological sex may modify these associations.

Perception of pregnant individuals, health providers and decision makers on interventions to cease substance consumption during pregnancy: a qualitative study.

BACKGROUND: Despite multiple recommendations and strategies implemented at a national and international level, cigarette smoking, alcohol consumption, and cannabis use during pregnancy remains high in most countries. The objective of this study was to examine key stakeholders' perception of the treatment interventions adopted in Spain, to identify political, organizational and personal factors associated with successful implementation, and to propose strategies for improvement. METHODS: A qualitative study with a phenomenological approach was conducted in 2022. The target groups were: (1) clinical decision makers in the field of addiction science, (2) health professionals who carry out treatment interventions, and (3) pregnant individuals who use tobacco, alcohol or cannabis. Two focus groups and eight in-depth interviews were conducted, recorded, and transcribed. Exploratory analysis and inductive open coding was performed, codes were merged into categories, and subcategories were identified. RESULTS: The analysis resulted in 10 subcategories which were further merged into three main categories: (1) Degree of adoption and utility of treatment interventions implemented; (2) Needs and demands with respect to the organization of treatment interventions; and, (3) Personal barriers to and facilitators for treatment. Respondents reported that despite multiple national and regional cessation initiatives, treatment interventions were rarely adopted in clinical practice. Health care administrators demanded reliable records to quantify substance use for better planning of activities. Health care professionals advocated for additional time and training and both echoed the importance of integrating cessation interventions into routine prenatal care and creating in-house specialized units. The difficulty in quitting, lack of awareness of risk for foetus and child and the controversial advice were identified as barriers by pregnant individuals. CONCLUSIONS: Consistent with previous work, this study found that cessation strategies implemented by the health authorities are not effective if they are not accompanied by organizational and behavioral changes. The current study identifies a set of factors that could be pivotal in ensuring the success of treatment interventions targeting tobacco, alcohol and cannabis use among pregnant individuals.

Mortality attributable to secondhand smoke exposure in the autonomous communities of Spain.

INTRODUCTION AND OBJECTIVES: Exposure to secondhand smoke (SHS) causes cardiovascular disease, respiratory disease, and cancer. The aim of this study was to estimate the mortality attributed to SHS in people aged ≥ 35 years in Spain and its autonomous communities (AC) by sex from 2016 to 2021. METHODS: Estimates of SHS-attributable mortality were calculated by applying the prevalence-dependent method where SHS exposure was derived from the adjustment of small-area models and based on the calculation of population-attributed fractions. Sex, age group, AC, and cause of death (ischemic heart disease and lung cancer) were included. The estimates of attributed mortality are presented with their 95% confidence interval (95%CI). Crude and age-standardized rates were estimated for each sex and AC. RESULTS: From 2016 to 2021, SHS exposure caused 4,970 (95%CI, 4,787-5,387) deaths, representing 1.6% of total mortality for ischemic heart disease and lung cancer. The burden of attributed mortality differed widely among the AC, with Andalusia having the highest burden of attributed mortality (crude rate: 46.6 deaths per 100 000 population in men and 17.0/100 000 in women). In all the AC, the main cause of death in both sexes was ischemic heart disease. The highest burden of mortality was observed in nonsmokers. CONCLUSIONS: The burden of SHS-attributable mortality was high and varied geographically. The results of this study should be considered to advance tobacco control legislation in Spain.

Assessing conflict of interest reporting and quality of clinical trials on infant formula: a systematic review.

OBJECTIVES: This study aims to assess the quality, risk of bias, and conflicts of interest (COIs) of clinical trials conducted on the effects of fortified infant formula. STUDY DESIGN AND SETTTING: Systematic review including all randomized clinical trials targeting healthy children and using three arms: fortified infant formula; standard formula; and breastfeeding. We performed a descriptive analysis of the studies reviewed, assessed their quality using the "Risk of Bias 2- RoB 2" tool, and identified COIs. RESULTS: A total of 40 studies were included. All showed a high overall risk of bias, with this being especially noteworthy in the "deviations from intention to treat" and "missing outcome data" domains. Of the total included studies, 29 reported conclusions in favor of the fortified formula; 15 studies reported multiple conclusions that were either contradictory or not in line with the results. COIs with industry were identified in 33 studies, and in 17 studies, these conflicts were not declared in the appropriate section. CONCLUSION: From a methodological perspective, studies on fortified infant formula display low quality, made evident by the high risk of bias. Additionally, there are frequent COIs. These aspects must be considered by health professionals and the population when drawing up recommendations for the use of this product.

Prevalence of obesity in Spain and its autonomous communities, 1987-2020.

INTRODUCTION AND OBJECTIVES: Obesity is a public health concern with a strong impact on the health of the population. The aim of this study was to analyze the trend in the prevalence of obesity and to identify changes in this trend in Spain and its 17 autonomous communities (AC) among the population aged ≥ 15 years from 1987 to 2020. METHODS: A trend analysis of the prevalence of obesity was conducted with data extracted from the complete historical series of the Spanish National Health Survey and the European Health Survey in Spain using joinpoint regression models. For each period identified in the trend analysis, we estimated the annual percentage change (APC) and its 95% confidence interval (95%CI). The results are presented for crude and standardized prevalences by the direct method accompanied by 95%CI, sex ratios, and relative changes in prevalences between periods. RESULTS: The prevalence of obesity increased from 7.3% (95%CI, 7.0-7.7) in 1987 to 15.7% (95%CI, 15.1-16.3) in 2020. In men, the prevalence increased until 2009 (APC,4.3; [95%CI, 3.8-5.0]) and then stabilized. In women, the prevalence increased until 2001 (APC,4.2; [95%CI, 2.7-8.8]) and subsequently also stabilized. The prevalence of obesity and its trend varied between AC, with three different patterns being observed with standardized prevalences: AC with a continuous increase, AC with an increase and subsequent stabilization, and AC with an increase and subsequent decrease. CONCLUSIONS: The prevalence of obesity has increased in Spain since 1987, although in the last decade it has remained stable at values above 15%. However, in the group aged 15 to 24 years, the prevalence of obesity showed an increasing trend throughout the study period.

Evolution and characteristics of studies estimating attributable mortality to second-hand smoke: a systematic review.

BACKGROUND: Several studies have estimated the impact of second-hand smoke (SHS) exposure on mortality in the population of different countries. This study aimed to identify and describe studies that have estimated the attributable mortality (AM) associated with SHS exposure in the adult population. METHODS: A literature search was conducted in MEDLINE, EMBASE, Cochrane Library and CINAHL databases up to January 2023. Studies that estimated the AM associated with SHS exposure in the adult population and used a prevalence-dependent method were included. The main characteristics of the studies and their results were described. RESULTS: Fifty-three studies were included. Most of them were conducted in North America (n = 13), Europe (n = 14) and China (n = 6) and included lung cancer (n = 46) or ischaemic heart disease (n = 22) as causes of death. There was considerable variety in the population under study regarding the relationship with tobacco: non-smokers (n = 30); never-smokers (n = 9); both non and never-smokers (n = 2); the whole population (n = 1) and not known (n = 11). The age at which AM was estimated also varied between studies, ranging from 15 to 40 years and older. CONCLUSIONS: Studies estimating AM associated with SHS exposure are heterogeneous in terms of the causes of death studied, the age at which mortality is attributed, or the population to which mortality referred: consensus should be reached. Despite their importance, studies assessing AM to SHS are infrequent in low- and middle-income countries.

Consumo de antibióticos en los primeros meses de vida: un estudio transversal / Antibiotic consumption in the first months of life: A cross-sectional study

Introducción: Los factores y patrones asociados al consumo de antibióticos en los lactantes no están claros. Nuestro objetivo fue evaluar la incidencia acumulada de consumo de antibióticos desde el nacimiento hasta los 16meses e identificar los factores asociados al consumo de antibióticos entre lactantes de 4 a 16meses. Material y métodos: Se realizó un estudio transversal en 2016 que incluyó una muestra de la población de 18.882 mujeres españolas de Galicia que habían dado a luz a un niño vivo entre el 1 de septiembre de 2015 y el 31 de agosto de 2016. Se calculó la incidencia acumulada de consumo de antibióticos a partir de los resultados de la entrevista a la madre sobre el consumo del lactante desde el nacimiento hasta los 14meses; no se estimó a los 15 y 16meses debido al reducido tamaño muestral. Para valorar las características asociadas al consumo de antibióticos se anidó en el estudio transversal un estudio de casos y controles emparejando por mes de nacimiento, un control por caso. Resultados: La incidencia acumulada de consumo de antibióticos entre los lactantes de 0 a 14meses de edad aumentó del 7,5% al 66,0%. Para el estudio de casos y controles, se obtuvo información de 1.852 casos y de 1.852 controles. La asistencia a la guardería (OR: 3,8 [IC95%: 3,2-4,6]), tener hermanos/as mayores (OR: 1,8 [IC95%: 1,6-2,1]), las consultas sanitarias en la clínica privada (OR: 1,6 [IC95%:1,4-2,0]) o haber estado expuesto al humo ambiental de tabaco (OR: 1,3 [IC95%: 1,1-1,6]) se asociaron con un mayor riesgo de consumo de antibióticos. Tener madres de entre 30 y 39años o de 40años y más en el momento del parto se asoció con un menor riesgo de consumo de antibióticos (OR: 0,8 [IC95%: 0,7-1,0] y OR: 0,6 [IC95%: 0,5-0,8], respectivamente).(UA)

Introduction: The factors and patterns associated with antibiotic consumption in infants are unclear. Our aim was to assess the cumulative incidence of antibiotic consumption from birth to 16 months and identify factors associated with antibiotic consumption among infants aged 4 to 16 months. Material and methods: We conducted a cross-sectional study in 2016 in a sample of 18,882 women from Galicia, Spain, who had given birth to a live child between September 1, 2015 and August 31, 2016. We calculated the cumulative incidence of antibiotic consumption based on maternal reports regarding the infant's consumption from birth to 14 months obtained through interviews; we did not estimate consumption at ages 15 and 16 months due to the small sample size. To assess which factors were associated with antibiotic consumption, we carried out a nested case-control study matching cases and controls for birth month on a 1:1 ratio. Results: The cumulative incidence of antibiotic consumption among infants aged 0 to 14 months increased from 7.5% to 66.0%. The case-control study included data for 1,852 cases and 1,852 controls. Daycare attendance (OR: 3.8 [95%CI: 3.2-4.6]), having older siblings (OR: 1.8 [95%CI: 1.6-2.1]), health care visits to private clinics (OR: 1.6 [95%CI: 1.4-2.0]), and passive smoking (OR: 1.3 [95%CI: 1.1-1.6]) were associated with an increased probability of antibiotic consumption. Maternal age between 30-39 years or 40 years and over at the time of birth was associated with a decreased probability of antibiotic consumption (OR: 0.8 [95%CI, 0.7-1.0] and OR: 0.6 [95%CI: 0.5-0.8], respectively). Conclusions: Some of the factors associated with antibiotic consumption in infants are modifiable and should be considered in the development of public health measures aimed at reducing antibiotic consumption.(AU)

Antibiotic consumption in the first months of life: A cross-sectional study.

INTRODUCTION: The factors and patterns associated with antibiotic consumption in infants are unclear. Our aim was to assess the cumulative incidence of antibiotic consumption from birth to 16 months and identify factors associated with antibiotic consumption among infants aged 4-16 months. MATERIAL AND METHODS: We conducted a cross-sectional study in 2016 in a sample of 18 882 women from Galicia, Spain, who had given birth to a live child between September 1, 2015 and August 31, 2016. We calculated the cumulative incidence of antibiotic consumption based on maternal reports regarding the infant's consumption from birth to 14 months obtained through interviews; we did not estimate consumption at ages 15 and 16 months due to the small sample size. To assess which factors were associated with antibiotic consumption, we carried out a nested case-control study matching cases and controls for birth month on a 1:1 ratio. RESULTS: The cumulative incidence of antibiotic consumption among infants aged 0-14 months increased from 7.5% to 66.0%. The case-control study included data for 1852 cases and 1852 controls. Daycare attendance (OR: 3.8 [95% CI: 3.2-4.6]), having older siblings (OR: 1.8 [95% CI: 1.6-2.1]), health care visits to private clinics (OR: 1.6 [95% CI: 1.4-2.0]), and passive smoking (OR: 1.3 [95% CI: 1.1-1.6]) were associated with an increased probability of antibiotic consumption. Maternal age between 30-39 years or 40 years and over at the time of birth was associated with a decreased probability of antibiotic consumption (OR: 0.8 [95% CI, 0.7-1.0] and OR: 0.6 [95% CI: 0.5-0.8], respectively). CONCLUSIONS: Some of the factors associated with antibiotic consumption in infants are modifiable and should be considered in the development of public health measures aimed at reducing antibiotic consumption.

Occupational exposure to endotoxins and small cell lung cancer: a systematic review with meta-analysis.

The relationship of occupational exposure to endotoxins with different histologic subtypes of lung cancer has not been established. Our objective was to conduct a systematic review with meta-analysis to assess the effect of exposure to endotoxins on the development of small cell lung cancer (SCLC). A bibliographic search was conducted using MEDLINE, Embase, CENTRAL, and Web of Science databases until December 2022, including all cohort and/or case-control studies that examined occupational exposure to endotoxins and SCLC. Risk of bias was assessed using the U.S. Office of Health Assessment and Translation tool. A random effects model was applied, publication bias were assessed, and a sensitivity analysis was conducted. Four papers were selected for meta-analysis purposes. A total of 144 incident cases of SCLC and 897 population or hospital controls were included. Occupational exposure to endotoxins was considered for textile/leather industry and agricultural sector workers exposed to endotoxins originating from wool, cotton, or leather dust. Except for one study, all investigations were classified as having a low probability of risk of biases. The results of the meta-analysis were not statistically significant (pooled OR: 0.86; 95% CI:0.69-1.08). In addition, neither between-study heterogeneity (I2=0%;p=0.92) nor publication bias was observed (p=0.49). The results of the sensitivity analysis, after including five studies that assessed the risk of SCLC among textile industry and crop/livestock farm workers (not specifically exposed to endotoxins), showed a negative statistically non-significant association and low between-study heterogeneity (pooled OR: 0.90; 95% CI:0.79-1.02; I2=22%;p=0.23). Subjects exposed to occupational exposure to endotoxins seem to exhibit a negative association with the development of SCLC, although the results are not conclusive.

Towards stronger tobacco control policies to curb the smoking epidemic in Spain.

Smoking and exposure to secondhand smoke pose a significant risk to the health of populations. Although this evidence is not new, the commitment of countries to implement laws aimed at controlling consumption and eliminating exposure to secondhand smoke is uneven. Thus, in North America or in Europe, locations like California or Ireland, are pioneers in establishing policies aimed at protecting the population against smoking and secondhand smoke. Identifying measures that have worked would help control this important Public Health problem in other countries that are further behind in tobacco control policies. In Spain, there has been almost 15 years of little political action in legislation oriented to control the tobacco epidemic. If we want to achieve the tobacco endgame, new legislative measures must be implemented. In this paper, we have elucidated tobacco control policies that could be implemented and show how different countries have done so.

Evolution of smoking prevalence in Spain and its 17 autonomous regions (1987-2020). / Evolución de la prevalencia de consumo de tabaco en España y sus 17 comunidades autónomas (1987-2020).

BACKGROUND AND OBJECTIVES: Continuous monitoring of smoking prevalence is essential to understand the evolution of the tobacco epidemic in a population. The objective of this study was to analyze the evolution of smoking prevalence in Spain and its 17 Autonomous Regions (ARs) in population ≥15 years during the period 1987-2020. METHODS: Tobacco consumption data were derived from the National Health Survey of Spain and the European Health Survey in Spain. A smoker was defined as a person who smoked at the time of the survey. The trend in prevalences by sex in Spain and its ARs was analyzed by applying joinpoint models. Age-standardized prevalences were calculated for Spain by applying the direct method. RESULTS: In Spain, the prevalence of consumption decreased 29 percentage points in men and 4.5 in women between 1987-2020. In men, the smoking prevalence decreased in all the ARs and the absolute change varied between -19.5% in the Balearic Islands and -33.9% in Andalusia. In women, the evolution of smoking prevalence differed between ARs. The absolute change varied between -15.4% in Basque Country and 0.5% in Andalusia. CONCLUSIONS: The number of men and women smokers has decreased in Spain between 1987-2020. Different patterns of evolution of the prevalence of consumption are observed among the ARs, especially among women. This reinforces the need for policies adapted to more local contexts and that take into account the gender perspective.

Genome Wide Association Studies in Small-Cell Lung Cancer. A Systematic Review.

Small cell lung cancer (SCLC) is one of the deadliest forms of lung cancer, but few information exists regarding the role of genetics, particularly on Genome Wide Association Studies (GWAS). The aim of the study is to explore the evidence available obtained through GWAS studies for SCLC using a systematic review. We performed a literature search in the main databases until July 31st, 2023. We included all human based studies on GWAS for lung cancer which presented results for SCLC. Only studies with participants diagnosed of SCLC with anatomopathological confirmation were included. Fourteen studies were identified; 8 studies showed a relationship between ASCL1 overexpression and SCLC, which may regulate CHRNA5/A3/B4 cluster, producing a consequent nAChR overexpression. Nine papers, including 8 of the previous, found a positive association between SNPs located in chromosome 15 and SCLC. The most important cluster of genes found is CHRNA5/A3/B4 but the mechanism for the role of these genes is unclear. Kyoto Encyclopaedia of Genes and Genome (KEGG) shows that these receptors were found to be overexpressed where nicotine, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and N'-Nitrosonornicotine (NNN) acts, involving different routes in SCLC carcinogenesis.

Consumo de alcohol y caracterización de los bebedores problemáticos en Galicia / Alcohol consumption and characterization of hazardous drinkers in Galicia

Conocer en detalle la epidemiología del consumo de alcohol a nivel poblacional es indispensable para diseñar programas de Salud Pública eficaces. Los objetivos de este estudio fueron estimar la prevalencia del consumo de alcohol diario, ocasional, esporádico, intensivo y problemático entre los gallegos de 16 y más años y caracterizar a los bebedores problemáticos teniendo en cuenta la perspectiva de género. Se realizó un estudio transversal en 2017 entre la población mayor de 15 años residente en Galicia en el marco del Sistema de Información sobre Conductas de Riesgo (SICRI). En 2017, se entrevistaron 7.841 adultos seleccionados mediante muestreo aleatorio estratificado. Se incluyeron preguntas relacionadas con el consumo de alcohol en el último mes y se estimó la prevalencia de consumo problemático empleando el test AUDIT. Para caracterizar a los bebedores problemáticos se ajustó un modelo de regresión logística multivariante. El 18,8% de la población gallega consumía alcohol a diario y el 3,4% tenían un consumo problemático. Las prevalencias de consumo de alcohol diario, ocasional, esporádico, intensivo o problemático fueron más altas entre los hombres y variaron por edad. La prevalencia de consumo diario-ocasional y esporádico fue más alta a edades medias (45-64 años), y el intensivo y problemático entre los 16 y 24 años. Las características asociadas a un consumo problemático de alcohol varían por sexo, identificándose características comunes como la edad o ser fumador de tabaco o cannabis, y diferenciales como el nivel de estudios. Las tipologías de consumo cambian en función de la edad y del sexo. Los sistemas de vigilancia deberían monitorizar de forma periódica el consumo de alcohol para adaptar las medidas de prevención a cambios en la tipología de consumo. (AU)

Detailed knowledge of the epidemiology of alcohol consumption at the population level is essential to the design of effective public health programs. The objectives of this study were to estimate the prevalence of daily, sporadic, occasional, binge and hazardous alcohol consumption among the Galician population aged 16 years and over, and to characterize hazardous drinkers, taking into account the gender perspective. A cross-sectional study was conducted in 2017 among people aged over 15 years residing in Galicia in the framework of the Risk Behavior Information System (SICRI). In 2017, 7,841 adults were interviewed by stratified random sampling. Questions related to alcohol consumption in the last month were included and the prevalence of hazardous consumption was estimated using the AUDIT test. A multivariate logistic regression model was fitted to characterize hazardous drinkers. A total of 18.8% of the Galician population consumed alcohol daily and 3.4% had hazardous consumption. The prevalence of daily, occasional, sporadic, binge and hazardous drinking was higher among men and varied by age. The prevalence of daily-occasional and sporadic drinking was highest at middle age (45-64 years), and binge and hazardous drinking among those aged 16 to 24 years. The characteristics associated with hazardous drinking varied by gender, and are identified by common characteristics to both genders such as age or being a tobacco or cannabis smoker, and differential characteristics such as educational level. Typologies of consumption changed according to age and gender. Surveillance systems should regularly monitor alcohol consumption in order to adapt prevention measures to changes in drinking patterns. (AU)

Sedentary behavior and physical inactivity from a comprehensive perspective.

OBJECTIVE: To characterize the prevalence of physical activity in the population aged ≥16 years integrating sedentarism and physical inactivity. METHOD: A cross-sectional study using data from the Galician Risk Behavior Data System (n=12,928) was conducted. The population was classified into four categories: physically active (active and non-sedentary), active but sedentary (active and sedentary), lightly active (inactive and non-sedentary), and extremely sedentary (inactive and sedentary). Prevalences were calculated for each category and a multinomial logistic regression model was fitted. RESULTS: 58.0% of the population was physically active and the remaining 42.0% presented some degree of sedentarism and/or physical inactivity. Men were more likely to be extremely sedentary. The risk of sedentarism decreased with age, and workers and/or students were prone to a higher risk of extreme sedentarism in comparison to those who reported other status. Extremely sendentary behaviors were also more common in people with higher educational levels, individuals living alone, residents of urban environments, and smokers. CONCLUSIONS: Joint evaluation of sedentarism and physical inactivity provides a more comprehensive and realistic picture of population behaviors related with physical activity. Since sedentarism is the most prevalent behavior, this study recommends that interventions be conducted at work and at academic environments.

An overview on the relationship between residential radon and lung cancer: what we know and future research

We aim to provide an overview of the research available on indoor radon and lung cancer, with a special focus on Spanish investigations. Early studies on underground miners established the link between radon and lung cancer, which was later confirmed for the general population by residential case–control studies. Spain contributed with extensive evidence, including 5 multicentric, hospital-based, case–control studies in the last 30 years, exploring diverse aspects, such as radon's effect on never-smokers, molecular pathways linking radon exposure to lung cancer risk, survival rates, mortality burden, and occupational exposure. There is a well-established causal association between radon with lung cancer. Despite pioneering research performed in our country by the Galician Radon Laboratory, particularly on driver genes, the evidence on the potential molecular pathways which makes radon a carcinogen is sparse. Also, relevant questions on the potential association of radon exposure with the induction of other diseases are still pending (AU)

Scientific misconduct: A cross-sectional study of the perceptions, attitudes and experiences of Spanish researchers.

This study sought to identify the perceptions, attitudes and experiences of Spanish researchers regarding different aspects relating to scientific misconduct, both overall and by gender, years of research experience, and type of research institution. This is a cross-sectional study based on an anonymous online survey, targeting researchers in the field of biomedicine. The survey comprised a first block (13 questions) covering sociodemographic data, and a second block (14 questions) covering researchers' perceptions, attitudes and experiences. A descriptive analysis was performed. 403 researchers answered the survey: 51.1% (n = 205) women, median age 45 years. The observed frequency of scientific misconduct was 78.8%. Additionally, 43.3% of researchers acknowledged having intentionally engaged in some type of scientific misconduct (self-reported frequency). The most frequent type of scientific misconduct was false authorship. The most frequent types of both observed and self-reported scientific misconduct did not appear to differ by years of experience but did differ by gender and type of research institution. In conclusion, there is a high frequency of scientific misconduct among Spanish biomedical science researchers as 4 of 10 researchers recognized that took part in any type of scientific misconduct. There are differences between the most frequent types of misconduct according to different characteristics, mainly type of institution.

Occupational exposure to respirable crystalline silica and lung cancer: a systematic review of cut-off points.

BACKGROUND: Respirable crystalline silica (RCS) is associated with the development of lung cancer. However, there is uncertainty around the exposure threshold at which exposure to RCS may pose a clear risk for the development of lung cancer. The objective of this study was to review the cut-off points at which the risk of mortality or incidence of lung cancer due to occupational exposure to RCS becomes evident through a systematic review. METHODS: We conducted a search in PubMed, including cohort and case-control studies which assessed various categories of RCS exposure. A search was also conducted on the webpages of institutional organizations. A qualitative data synthesis was performed. RESULTS: Twenty studies were included. Studies that assessed lung cancer mortality and incidence displayed wide variability both in RCS exposure categories and related risks. Although most studies found no significant association for RCS exposure categories, it appears to be a low risk of lung cancer for mean concentrations of less than 0.07mg/m3. Regulatory agencies set annual RCS exposure limits ranging from 0.025mg/m3 through 0.1mg/m3. CONCLUSIONS: There is a wide degree of heterogeneity in RCS exposure categories, with most studies observing no significant risk of lung cancer for the lowest exposure categories. Cut-off points differ between agencies but are nonetheless very similar and do not exceed 0.1mg/m3.