Mortality after radiotherapy or surgery in the treatment of early stage non-small-cell lung cancer: a population-based study on recent developments.

BACKGROUND: Stereotactic body radiotherapy (SBRT) can achieve high tumour control with limited toxicity for inoperable early stage non-small-cell lung cancer (NSCLC) patients. PATIENTS AND METHODS: The German Epidemiologic Cancer Registries from the Robert-Koch Institute were assessed. Periods according to the availability of SBRT were: (1) 2000-2003 (pre-SBRT); (2) 2004-2007 (interim); and (3) 2007-2014 (broad availability of SBRT). To assess the association of cancer-related parameters with mortality, hazard ratios (HR) from Cox proportional hazards models were computed. To evaluate the change of treatment-related mortality, we performed interaction analyses and the relative excess risk due to interaction (RERI, additive scale) was computed. RESULTS: A total of 16,292 patients with UICC stage I NSCLC diagnosed between 2000 and 2014 were analysed. Radiotherapy utilization increased from 5% in pre-SBRT era to 8.8% after 2007. In univariate analyses, survival in the whole cohort improved only marginally when 2000-2003 is compared to 2004-2007 (HR 0.92, 95% CI 0.85-1.01) or 2008-2014 (HR 0.93, 95% CI 0.86-1.01). Comparing surgery/radiotherapy, mortality in the radiotherapy group started from a 3.5-fold risk in 2000-2003 to 2.6 after 2007. The interaction analysis revealed a stronger improvement for radiotherapy (multiplicative scale for 2000-2003 vs. > 2007: 0.74, 95% CI 0.58-0.94). On an additive scale, treatment × period interaction revealed an RERI for 2000-2003 vs. > 2007 of - 1.18 (95% CI - 1.8, - 0.55). CONCLUSIONS: Using population-based data, we observed a survival improvement in stage I lung cancer over time. With an increasing utilization of radiotherapy, a stronger improvement occurred in patients treated with radiotherapy when compared to surgery.

[General aspects regarding the skin microbiome]. / Grundlegende Aspekte zum Hautmikrobiom.

The human body is densely populated by trillions of microorganisms, which are collectively known as the human microbiota. On the outermost barrier, the skin, a plethora of different bacteria and fungi as well as viruses and mites reside. The skin of different body sites shows a high degree of heterogeneity, generating multiple ecological niches. For example, moisture, sebum and sweat promote the growth of different microorganisms. This diversity has hampered a global and objective analysis of the composition of the microbiota in the past. Today, approximately 10 years after the development of metagenome analysis by next generation high-throughput DNA sequencing, these techniques are now established and affordable in research fields. These techniques enable investigations on the microorganisms living in and on body surfaces and represent an important tool in diverse clinical questions. This review addresses new developments in the (physiological) composition of the skin microbiota and briefly summarizes the research techniques applied.

The knowledge, attitude and practice of health practitioners towards antibiotic prescribing and resistance in developing countries-A systematic review.

WHAT IS KNOWN AND OBJECTIVE: Inappropriate antibiotic use is the leading cause of antibiotic resistance especially in developing countries, where patient management is mainly based on the prescription of medicines due to deficiencies in diagnostic procedures. The objective of this study was to conduct a systematic review of studies on knowledge, attitude and practice of health practitioners towards antibiotic prescribing and resistance in developing countries. METHODS: We used MEDLINE and EMBASE to conduct a systematic search for studies. We included papers that focused on health practitioners' knowledge on antibiotic use, local resistance and extent of the antibiotic resistance problem; the health practitioners' confidence in prescribing; commonly used guides; and recommendations to improve antibiotic prescribing. Studies that assessed other indicators were excluded. We assessed the quality of the individual studies using a previously published quality assessment tool. Data were summarized into proportions and means. We registered the review with PROSPERO, registration number CRD42018085664. RESULTS AND DISCUSSION: We obtained 384 papers, 345 papers after deduplication, 28 relevant papers upon reviewing titles and abstracts, and 15 articles fulfilled our inclusion criteria upon full-text review. Most of the studies were of medium quality (ten), three were of low quality, and two were of high quality. An average of 80.9% of respondents correctly answered questions relating to antibiotic use, whereas 39.6% were aware of the local resistance patterns in their health facilities. Participants stated that antibiotic resistance was a general problem (75.2%), a global problem (84.7%), a national problem (88.0%), a problem in their health facilities (71.9%) and a problem in their daily practice (71.7%). Up to 78.2% of the participants reported that they were very confident or confident in antibiotic prescribing. WHAT IS NEW AND CONCLUSION: There was a high reported proportion of participants with an apparently good level of knowledge on antibiotic use and a high level of confidence in antibiotic prescribing, but the reported level of knowledge on local antibiotic resistance was low. The analysis was limited by the low number of studies included, and most of them had a medium quality.

Punch biopsies shorten time to clearance of high-risk human papillomavirus infections of the uterine cervix.

BACKGROUND: The primary objective was to determine human papilloma virus (HPV) clearance rate after cervical biopsy among women with persistent high-risk HPV infection compared with spontaneous HPV clearance rate in the absence of biopsy. METHODS: We collected data from a dedicated screening program of women aged 30-70 years old. Inclusion criteria for the baseline non-interventional cohort were a positive HPV test (hybrid capture 2, HC2) and normal cytology. In the baseline cohort women were followed with approximately yearly HPV-tests and cytology until HPV regressed (one negative HPV test) or interventions in the form of diagnostic biopsies or therapy. Women who had a diagnostic biopsy were included in the biopsy cohort and followed until HPV regression or therapy. Observed HPV regression rates and time to HPV regression were compared between baseline and biopsy cohorts. For the comparison, we used Fisher's exact test for the HPV regression rates and interval-censored, accelerated failure time model for time to HPV regression. RESULTS: Among the 1079 women included in the baseline cohort, 499 (46.3%) had HPV clearance and 475 were referred for colposcopy with biopsy. The biopsy cohort comprised all women who were not treated and had at least one HC2 test after biopsy (201/475; 42.3%). Of those, 138 (68.7%) experienced HPV regression. In the biopsy cohort, time to clearance of HPV infection was approximately halved (0.46, 95% CI 0.38-0.56) compared with the baseline cohort. This result was robust in a wide range of sensitivity analyses. CONCLUSIONS: A higher proportion of women cleared their HPV infection, and time to HPV clearance was shorter in the biopsy cohort than in the baseline cohort. It is reassuring for clinicians to know that conservative management of patients with HPV persistency is successful when colposcopy with biopsies excludes high-grade disease.

Transmission of respiratory and gastrointestinal infections in German households with children attending child care.

Transmission of acute respiratory infections (ARI) and acute gastroenteritis (AGE) often occurs in households. The aim of this study was to assess which proportion of ARI and AGE is introduced and transmitted by children in German households with children attending child care. We recruited families with children aged 0-6 years in Braunschweig (Germany), for a 4 months prospective cohort study in the winter period 2014/2015. Every household member was included in a health diary and used nasal swabs for pathogen identification in case of ARI. We defined a transmission if two persons had overlapping periods with symptoms and used additional definitions for sensitivity analyses. In total, 77 households participated with 282 persons. We observed 277 transmission events for ARI and 23 for AGE. In most cases, the first infected person in a household was a child (ARI: 63%, AGE: 53%), and the risk of within-household transmission was two times higher when the index case was a child. In 26 ARI-transmission events, pathogens were detected for both cases; hereof in 35% (95% confidence interval (17-56%)) the pathogens were different. Thus, symptomatic infections in household members, apparently linked in time, were in 2/3 associated with the same pathogens.

["I cannot kiss my wife"- An Analysis of Daily Experiences of MRSA-carriers]. / "Meine Frau kann ich nicht küssen" ­ Eine Analyse des Erlebens von MRSA-TrägerInnen.

Objectives: There are no data available on the quality of care after discharge from hospital and only limited data are available on the psychosocial effects of being an MRSA carrier within the German health system. Methods: Patients who tested positive for MRSA in the previous year were invited to take part in focus groups. Results: 2 focus groups with a total of 9 MRSA-carriers were conducted. The level of knowledge about MRSA differed between participants. In some cases, lack of information led to uncertainty and inappropriate measures to counteract MRSA. Some participants restricted their social contacts, especially to children, in order to prevent transmission. Patients experienced stigmatization in the health care system more often in inpatient care than in the outpatient sector. Only in a few cases both eradication therapy and swabs for control purposes were carried out. Conclusions: Information about the appropriate treatment and management of MRSA should be made available to patients more easily; in particular, patients need to be informed that MRSA is no threat to healthy individuals. Despite the desire of MRSA-carriers to become MRSA negative, treatment and control of MRSA seem to have low priority in the ambulant health care sector in Germany.

Association between rates of caesarean section and maternal and neonatal mortality in the 21st century: a worldwide population-based ecological study with longitudinal data.

OBJECTIVE: Caesarean section was initially performed to save the lives of the mother and/or her baby. Caesarean section rates have risen substantially worldwide over the past decades. In this study, we set out to compile all available caesarean section rates worldwide at the country level, and to identify the appropriate caesarean section rate at the population level associated with the minimal maternal and neonatal mortality. DESIGN: Ecological study using longitudinal data. SETTING: Worldwide country-level data. POPULATION: A total of 159 countries were included in the analyses, representing 98.0% of global live births (2005). METHODS: Nationally representative caesarean section rates from 2000 to 2012 were compiled. We assessed the relationship between caesarean section rates and mortality outcomes, adjusting for socio-economic development by means of human development index (HDI) using fractional polynomial regression models. MAIN OUTCOME MEASURES: Maternal mortality ratio and neonatal mortality rate. RESULTS: Most countries have experienced increases in caesarean section rate during the study period. In the unadjusted analysis, there was a negative association between caesarean section rates and mortality outcomes for low caesarean section rates, especially among the least developed countries. After adjusting for HDI, this effect was much smaller and was only observed below a caesarean section rate of 5-10%. No important association between the caesarean section rate and maternal and neonatal mortality was observed when the caesarean section rate exceeded 10%. CONCLUSIONS: Although caesarean section is an effective intervention to save maternal and infant lives, based on the available ecological evidence, caesarean section rates higher than around 10% at the population level are not associated with decreases in maternal and neonatal mortality rates, and thus may not be necessary to achieve the lowest maternal and neonatal mortality. TWEETABLE ABSTRACT: The caesarean section rate of around 10% may be the optimal rate to achieve the lowest mortality.

[Therapy Goals for Children and Adolescents with ADHD and their Primary Caregivers. A Content Analysis and Examination of Agreement of ADHD Patients and their Primary Caregivers]. / Therapieziele von Kindern und Jugendlichen mit ADHS und ihren Hauptbezugspersonen. Eine inhaltsanalytische Auswertung und Prüfung der Übereinstimmung zwischen Betroffenen und Bezugspersonen.

OBJECTIVE: The aim of this study was to identify individual therapy goals (ITGs) of children and adolescents with ADHD and their primary caregivers. METHODS: Within the evaluation of the selective contract for children and adolescents with ADHD in Bremerhaven, Germany, ITGs of 42 study participants (aged 8-17) and their primary caregivers were collected with the psychotherapy basis documentation for children and adolescents (Psy-BaDo-KJ). ITGs were analysed following the classification of categories for individual therapy goals (KITZ) and their modification for children and adolescents. Analysis focused on the most frequently named ITGs and the agreement of patients and primary caregivers ITGs on the individual level. RESULTS: 235 ITGs were named. The greatest proportion of ADHD patients and their caregivers (47%) focused on interactional, psychosocial conflicts. In 19% of the cases (n=8) patients and their caregivers had the same main goal. 38% of patients and of caregivers (n=16) named the other ones main goal in one of his/her ITGs as well. CONCLUSIONS: ADHD patients and their primary caregivers both pursue ITGs related to ADHD symptoms. Few ITGs address medication related aspects. In case of differences in the ITGs of a patient and his/her primary caregivers, therapists should check whether differing ITGs address the same problem from different perspectives.

[Linkage of statutory health insurance data with those of a hospital information system: feasible, but also "useful"?]. / Verknüpfung von Routinedaten der Gesetzlichen Krankenversicherung mit Daten eines Krankenhausinformationssystems: Machbar, aber auch "nützlich"?

AIM: Administrative data are increasingly being linked with other data sources for research purposes in the field of epidemiology and health services research abroad. In Germany, the direct linkage of routine data of statutory health insurance (SHI) providers with other data sources is complicated due to strict data protection requirements. The aim of this analysis was to evaluate an indirect linkage of SHI routine data with data of a hospital information system (HIS). METHODS: The dataset comprised data from 2004 to 2010 from 2 sickness funds and one HIS. In both data sources, hospitalisations were restricted to admissions into one hospital with at least one diagnosis of heart failure. The 2 data sources were linked, in cases of the agreement of the admission and discharge dates, as well as the agreement of at least a certain percentage of diagnoses in HIS data when compared to SHI data (full coding depth). Based on the direct linkage using the pseudonymised insurance number as gold standard, the proposed linkage approach was evaluated by means of test statistics. Furthermore, the completeness of relevant information of the HIS was described. RESULTS: The dataset contained 3 731 hospitalisations from the HIS and 8 172 hospitalisations from the SHI routine data. The sensitivity of the linkage approach was 86.7% in the case of an agreement of at least 30% of the diagnoses and decreased to 41.7% in the case of 100% agreement in the diagnoses. The specificity was almost 100% at all studied cut-offs of agreement. Anthropometric measures and diagnostic information were available only for a small fraction of cases in the data of the HIS, whereas information on the health status and on laboratory information was comparatively complete. CONCLUSION: For the linkage of SHI routine data with complementary data sources, indirect linkage methods can be a valuable alternative in comparison to direct linkage, which is time-consuming with regard to planning and application. Since the proposed approach was used in a relatively small sample and a restricted patient population, a replication using nation-wide data without respective restrictions would require an extension of the algorithm. Furthermore, the large administrative effort seems questionable considering the comparatively high amount of missing values in interesting information in the HIS.

Illicit substance use among university students from seven European countries: a comparison of personal and perceived peer use and attitudes towards illicit substance use.

OBJECTIVE: To compare European students' personal use and approval of illicit substance use with their perceptions of peer behaviours and attitudes, and investigate whether perceptions of peer norms are associated with personal use of illicit substances and attitudes. METHOD: This study used baseline data from the Social Norms Intervention for the prevention of Polydrug usE (SNIPE) project involving 4482 students from seven European countries in 2012. Students completed an online survey which included questions on personal and perceived peer illicit substance use and personal and perceived peer attitude towards illicit substances. RESULTS: 8.3% of students reported having used illicit substances at least once in their life. 49.7% of students perceived that the majority of their peers have used illicit substances more frequently than themselves. The perception was significantly associated with higher odds for personal illicit substance use (OR: 1.97, 95% CI: 1.53-2.54). The perception that the majority of peers approve illicit substance use was significantly associated with higher odds for personal approval of illicit substance use (OR: 3.47, 95% CI: 2.73-4.41). CONCLUSION: Students commonly perceived that their peers used illicit subtances more often than themselves. We found an association between the perceived peer norms/attitudes and reported individual behaviour/attitudes.

Evaluating methods for intersectoral comparison of quality of care. A routine data analysis of elective percutaneous coronary interventions.

OBJECTIVES: To compare the quality of care regarding the use of elective percutaneous coronary interventions (PCIs) in the inpatient and outpatient setting and to evaluate different methods of confounder control in this context. METHODS: Based on data of three statutory health insurances including more than nine million insurance members, a retrospective cohort study between 2005 and 2009 was conducted. The occurrence of myocardial infarction, stroke, further coronary intervention and death was ascertained following the first PCI in the study period, which was preceded by a one-year period without a PCI. A Cox proportional hazard model was used to assess the influence of the setting of the elective PCI on the risk for complications after the PCI for each outcome separately. Age, sex, the number of diseases of the Elixhauser comorbidity measure, past acute coronary syndrome, coronary artery disease, dyslipidemia, past stroke, past coronary artery bypass surgery and the year of the PCI were included as covariables. The analyses were repeated in a propensity score matched cohort as well as in inverse probability of treatment weighted analyses. RESULTS: The cohort comprised 4,269 patients with an outpatient PCI and 26,044 patients with an inpatient PCI. The majority of the analyses revealed no statistically significant effect of the setting of the PCI on the risk of myocardial infarction, stroke and further coronary interventions, whereas a reduced mortality risk was observed for outpatient PCIs. Similar results were obtained in the propensity score analyses. CONCLUSIONS: The analysis revealed that the adjusted risk for complications following an elective PCI is similar between the inpatient and the outpatient setting. For mortality the risk differed but this might be explained by residual or unmeasured confounding. The different methods applied in this study revealed mostly similar results. Since our study only covered one aspect of quality of care in the field of PCI and did not consider drug treatment in hospital or in the outpatient setting, further studies are needed which include these aspects.

[Use of routine data from statutory health insurances for federal health monitoring purposes]. / Nutzungsmöglichkeiten von Routinedaten der Gesetzlichen Krankenversicherung in der Gesundheitsberichterstattung des Bundes.

Federal health monitoring deals with the state of health and the health-related behavior of populations and is used to inform politics. To date, the routine data from statutory health insurances (SHI) have rarely been used for federal health monitoring purposes. SHI routine data enable analyses of disease frequency, risk factors, the course of the disease, the utilization of medical services, and mortality rates. The advantages offered by SHI routine data regarding federal health monitoring are the intersectoral perspective and the nearly complete absence of recall and selection bias in the respective population. Further, the large sample sizes and the continuous collection of the data allow reliable descriptions of the state of health of the insurants, even in cases of multiple stratification. These advantages have to be weighed against disadvantages linked to the claims nature of the data and the high administrative hurdles when requesting the use of SHI routine data. Particularly in view of the improved availability of data from all SHI insurants for research institutions in the context of the "health-care structure law", SHI routine data are an interesting data source for federal health monitoring purposes.

Evaluation of pregnancy outcome records in the German Pharmacoepidemiological Research Database (GePaRD).

PURPOSE: Routine health care data are a valuable source for the assessment of risks of drugs during pregnancy. Therefore, the aim of the current analysis was the evaluation of pregnancy outcome records in German health insurance data. METHODS: We used the German Pharmacoepidemiologic Research Database including data of more than 15 million insurants (about 18% of the German population). Among 10-49 year-old women, we identified six categories of pregnancy outcomes: term births, preterm births, stillbirths, induced abortions, spontaneous abortions and ectopic pregnancies. In order to assess the validity of these records, we have set our results in relation to representative data for the corresponding outcomes in Germany. We also investigated whether pregnancy markers (diagnoses, procedures or medical services which indicate an existing pregnancy) can be used to identify pregnancies. RESULTS: In total, we identified 94 261 pregnancy outcomes in 2005. The percentage of births outside hospital (1.2%) and of preterm births (11.6%), the rate of stillbirths (3 per 1000 live births) and the rate of ectopic pregnancies (20 per 1000 live births) agreed well with representative data for Germany. Compared to epidemiological data, the occurrence of spontaneous abortions was underestimated (5.4% of all pregnancies). There were 4.1 induced abortions per 100 live births, compared to 18.1 in national data. Positive predictive values and sensitivities of markers varied across marker categories and for different pregnancy outcomes. CONCLUSIONS: Completeness of pregnancy outcomes recorded in the database varied by pregnancy outcome. This should be taken into account in studies of drug safety in pregnancy.

Estimating the long-term effects of HPV vaccination in Germany.

In Germany, vaccination against the most oncogenic HPV types 16/18 is recommended by the Standing Committee on Vaccination (STIKO) for 12-17 year old girls since March 2007. We developed a dynamic mathematical model for the natural history and transmission of HPV infections to estimate the impact of vaccination on incidence and mortality of cervical cancer and its pre-stages, and on anogenital warts. We focused on an extensive model calibration to epidemiologic data for all stages of the natural history model as well as on a detailed implementation of cervical cancer screening modalities in Germany. Our model predicts first a substantial reduction of cervical cancer incidence and mortality over the next 30 years, which is mainly attributable to an increase in screening participation in the 1990s and not to HPV vaccination, followed by a further reduction attributable to vaccination. Over the next 100 years, HPV vaccination will prevent approximately 37% of cervical cancer cases even if vaccination coverage is only 50% (as currently observed in Germany). Consideration of cross-protection results in a further reduction of approximately 7% of all cervical cancer cases for the bivalent and about 5% for the quadrivalent vaccine in our model. Vaccination of boys was only reasonable if moderate to high vaccination coverage in girls was not achieved. Strategies should be implemented in Germany to increase HPV vaccination coverage among girls thereby making better use of the demonstrated benefits of the vaccine.

Does the individualized reference outperform a simple ultrasound-based reference applied to birth weight in predicting child neurodevelopment?

OBJECTIVES: Being small-for-gestational age (SGA) is associated with an increased risk of morbidity, but questions remain about how best to diagnose SGA, and thus, predict poor health consequences. The authors sought to compare an individualized reference for defining SGA with simple birth weight-based and ultrasound-based references applied to birth weight in predicting poor cognitive development at age five. METHODS: The authors used data from the Successive SGA Births Study, a prospective study including 699 Alabaman and 618 Scandinavian women recruited from 1986 to 1988, and whose children had cognitive development scores measured at age five using the Wechsler Preschool and Primary Scale of Intelligence-Revised Intelligence Quotient. Sensitivity, specificity and positive predictive value (PPV) were estimated for each reference applied to birth weight using adverse cognitive development (score < 10(th) percentile) as the outcome. Relative risk of poor neurodevelopment was calculated, comparing infants classified as SGA by either the individualized or the simple ultrasound-based reference with infants not classified as SGA. RESULTS: The individualized reference had higher specificity and PPV in predicting poor neurodevelopment. Neonates defined as SGA by the individualized reference alone had a higher risk (RR=2.20, 95% CI: 1.20, 4.00) of poor cognitive outcome, while those identified by the ultrasound-based reference alone did not (RR=0.95, 95% CI: 0.45, 2.01). None of the references could predict poor neurodevelopment well at age five. CONCLUSIONS: The individualized birth weight reference modestly outperforms the simple ultrasound-based reference in identifying SGA infants with poor child neurodevelopment. However, neither reference can predict child neurodevelopment well.

Seasonal trends in acute toxoplasmosis in pregnancy in the federal state of Upper Austria.

Knowledge about seasonal trends in acute toxoplasmosis in pregnancy may help to understand and avoid risk factors for infection. Analysing regular screening records of 51 754 pregnant women, members of the largest statutory health insurance company in the federal state of Upper Austria from 2000 to 2005, we found a twofold increase of diagnoses of acute toxoplasmosis during winter months. Taking the delay between infection and screening into account, the increased number of detections in winter points towards more frequent infections in autumn. We propose a higher consumption of contaminated vegetables and fruit from gardening as one of the potential explanations.

[Clinical and experimental considerations for evaluation of Eustachian tube physiology]. / Klinische und experimentelle Untersuchungen zur Physiologie der Tuba Eustachii.

BACKGROUND: Eustachian tube dysfunction plays a pivotal role in the pathogenesis of otitis media with effusion. Besides the lack of sufficient animal models to investigate the role of gastroesophageal reflux on Eustachian tube function, there is no reliable test that clinically allows the quantification of Eustachian tube function. Therefore, we established a Mongolian gerbil model to trace gastroesophageal reflux into the middle ear. In gerbils with traceable reflux, the refluxate reached the both middle ears through the Eustachian tubes in most cases. METHODS: Clinical studies were performed to analyze the reproducibility of measuring the accuracy of modified tube manometry in healthy Caucasians. RESULTS: Tube manometry was found to be a reliable and reproducible tool for measuring Eustachian tube function. CONCLUSIONS: Both our animal model and the clinical application of tube manometry are likely to be useful for further experimental and clinical studies.

Alcohol consumption and attitudes towards banning alcohol sales on campus among European university students.

OBJECTIVES: The European Commission's new health strategy for improving health at the European Union (EU) level includes tackling alcohol consumption. This study aimed to assess the prevalence of alcohol consumption and problem drinking, as well as students' attitudes towards banning the sale of alcohol on campus. STUDY DESIGN: In total, 5826 students from universities in seven European countries (Denmark, Germany, Spain, Lithuania, Poland, Bulgaria and Turkey) took part in this cross-sectional study. METHODS: A self-administered questionnaire assessed sociodemographic information, frequency of alcohol consumption, problem drinking and attitudes towards banning the sale of alcohol on campus. RESULTS: The highest prevalence of drinking alcohol more than once per week was reported in Bulgarian (males 46%, females 64%) and Spanish students (males 59%, females 64%). Among those students who drank alcohol (n=3170), problem drinking (CAGE score >1) was found in 24% of males and 13% of females. Male gender, depressive moods and a low importance of good grades at university were risk factors for drinking alcohol more than once per week as well as for problem drinking. There were substantial country differences in the proportion of students who would support a ban of alcohol sales on campus (23% in Denmark, 88% in Poland). Support for a ban was higher among female students and among students who drank alcohol once or less per week. CONCLUSIONS: Problem drinking is a concern among students in many European countries, especially among males. Students' support for banning the sale of alcohol on campus varies between countries and should be considered in developing EU policy.

Social contacts of school children and the transmission of respiratory-spread pathogens.

Empirical data about contact frequencies of children is needed for estimating parameters in mathematical modelling studies that investigate the effect of targeting influenza intervention to children. A survey about the social contacts of school children was conducted in a primary school in Germany. The distribution of the daily numbers of contacts was stratified by age of the contacted person and by weekday. A negative binomial regression analysis was performed to investigate factors that influence contact behaviour. Using logistic regression analysis we examined the relationship between the numbers of private contacts and having been ill in the last 6 months. We computed effective contact numbers to take the heterogeneity in contact behaviour into account in assessing the contribution of children's contacts to the overall transmission of an infection. The possible effects of intervention measures such as school closure and vaccination on the transmission of respiratory-spread agents to other age groups are discussed.