[Public Health: Setting Goals, Establishing Structures and Improving Health for All]. / Public Health ­ mehr Gesundheit für alle.

Public health is a population- and system-based approach that is needed to improve the health of societies and to decrease health inequalities. In the face of global challenges, the public health approach is essential. In Germany, the importance of public health is only partly reflected by its institutions and institutional arrangements. This applies equally to research, teaching and training, as well as to the public health service. Furthermore, the public health perspective is not sufficiently considered in cross-sectional topics that are relevant for health.There have been several initiatives to overcome structural deficits which can partly be traced back to historical circumstances. The White Paper presented here should encourage discussions about future policy options in public health. The authors represent public health in practice, research, and teaching in Germany.

[The first wave of the German Health Interview and Examination Survey for Adults (DEGS1): sample design, response, weighting and representativeness]. / Die erste Welle der Studie zur Gesundheit Erwachsener in Deutschland (DEGS1): Stichprobendesign, Response, Gewichtung und Repräsentativität.

The "German Health Interview and Examination Survey for Adults" (DEGS) is part of the health monitoring program of the Robert Koch Institute (RKI) and is designed as a combined cross-sectional and longitudinal survey. The first wave (DEGS1; 2008-2011) comprised interviews and physical examinations. The target population were 18- to 79-year olds living in Germany. The mixed design consisted of a new sample randomly chosen from local population registries which was supplemented by participants from the "German National Health Interview and Examination Survey 1998" (GNHIES98). In total, 8,152 persons took part, among them 4,193 newly invited (response 42%) and 3,959 who had previously taken part in GNHIES98 (response 62%). 7,238 participants visited one of the 180 local study centres, 914 took part in the interview-only programme. The comparison of the net sample with the group of non-participants and with the resident population of Germany suggests a high representativeness regarding various attributes. To account for certain aspects of the population structure cross-sectional, trend and longitudinal analyses are corrected by weighting factors. Furthermore, different participation probabilities of the former participants of GNHIES98 are compensated for. An English full-text version of this article is available at SpringerLink as supplemental.

[Health related quality of life in adults in Germany: results of the German Health Interview and Examination Survey for Adults (DEGS1)]. / Gesundheitsbezogene Lebensqualität bei Erwachsenen in Deutschland: Ergebnisse der Studie zur Gesundheit Erwachsener in Deutschland (DEGS1).

The aim of this study is to describe health related quality of life (HRQL) of the German adult population and provide current representative normative data for the version 2 of the SF-36 (SF-36V2) in the German population. In the German Health Interview and Examination Survey for Adults (DEGS1) the SF-36V2 was used to measure health-related quality of life. Men report in all areas better HRQOL compared to women, a lower social status is associated with lower HRQOL-values. Having one or more chronic diseases is associated with lower values in all dimensions of health-related quality of life. Compared to 10 years ago, the General health seems to be much better in women aged 40 to 49 years and older and in men aged 50 to 59 years and older. Version 2 of the SF-36 has proved to be a robust instrument of health-related quality of life that is able to plausible map differences regarding socio-demographic and health characteristics. An English full-text version of this article is available at SpringerLink as supplemental.

[DEGS: German Health Interview and Examination Survey for Adults. A nationwide cross-sectional and longitudinal study within the framework of health monitoring conducted by the Robert Koch Institute]. / DEGS: Studie zur Gesundheit Erwachsener in Deutschland. Bundesweite Quer- und Längsschnittstudie im Rahmen des Gesundheitsmonitorings des Robert Koch-Instituts.

The "German Health Interview and Examination Survey for Adults" (DEGS) is a nationwide longitudinal study carried out by the Robert Koch Institute (RKI) within the framework of a continuous health monitoring programme. The aim of this study is to provide representative data on the health status of adults in Germany on a regular basis, to calculate trends in the development of health indicators and to gain insights into the development of health during the course of life. These aims are realised by choosing a sampling design which allows establishment and follow-up of a panel and to provide a representative sample in each new wave of data collection. DEGS produces information for comprehensive health reporting, serves as a basis for health policy decision-making and provides data for epidemiological research. The first wave of data collection (DEGS1) was carried out from November 2008 until Dezember 2011 and comprises health interviews and physical examinations as well as blood and urine sampling. Detailed information on health status, health-related behaviour, healthcare and living conditions was gathered. Furthermore the study focuses on chronic diseases, mental health and implications of demographic changes for health. In order to be able to analyse longitudinal data as soon as possible, participants of the National Health Survey 1998 (BGS98) were included in DEGS1. The examination programme carried out in BGS98, was maintained and appended in DEGS1. A total of 8152 persons participated in DEGS1 and of these 3959 were former participants of BGS98. The participants of DEGS1 constitute the baseline cohort for repeated health interviews and examinations in the future. In wave 2, which is planned to begin in the middle of 2014, study participants will be followed up by interviewing. Wave 3 planned to follow in 2017, will again comprise an interview and examination survey with a supplementary sample. First results and basic analyses of all main topics of DEGS1 will follow in this journal in the middle of 2013. A public use file of DEGS1 data will be available for the scientific community by 2014.

[The KiGGS study. Nationwide representative longitudinal and cross-sectional study on the health of children and adolescents within the framework of health monitoring at the Robert Koch Institute]. / Die KiGGS-Studie. Bundesweit repräsentative Längs- und Querschnittstudie zur Gesundheit von Kindern und Jugendlichen im Rahmen des Gesundheitsmonitorings am Robert Koch-Institut.

From 2003 to 2006 the KiGGS Baseline Study was conducted, including a clustered random sample of 167 sample points and 17,641 children and adolescents from 0 to 17 years, as well as their parents in 167 sample points. The children and adolescents were medically and physically examined, and their parents answered questions about physical, psychological and social aspects of their children's health, as did, from 11 years on, the children and adolescents themselves. Within the framework of the nationwide health monitoring at the Robert Koch Institute, the KiGGS study is being continued as a prospective cohort study with an interval of approximately 5 years between follow-ups. The study sample will be cross-sectionally refilled with younger age groups at each time of measurement. The assessment of the KiGGS core study follows a core indicator concept, which is modularly complemented by external scientific cooperation partners. The field work of the first wave (KiGGS Wave 1), a telephone survey, will continue until June 2012. The second follow-up (KiGGS Wave 2) will again combine examinations and interviews, starting in 2013. On the basis of the nationally representative KiGGS data, important questions about health policy can be answered, such as trends and trajectories of health. Important results are expected, among others concerning trends in overweight and obesity, the incidence of atopic diseases, and the persistency or remission of psychopathological symptoms and disorders.

[Possibilites and limitations of retrospective research on cause of death within the framework of a nationwide epidemiological study]. / Möglichkeiten und Grenzen retrospektiver Todesursachenrecherchen im Rahmen bundesweiter epidemiologischer Studien.

Cause-specific mortality is an important endpoint in longitudinal epidemiological studies to research causal health links and carry out individual process analyses. As in Germany no national mortality register exists, state-specific data-protection conditions for and approaches to cause of death studies were researched and tested within the framework of a pilot project. The database was provided by a sample of deceased study participants from the 1998 nationwide health survey. Under the given conditions, cause of death research in a nationwide epidemiological study is possible in principle, but requires a great deal of time and effort. In Rhineland-Palatinate research needs to be carried out in a timely manner as the health authorities' retention period for death certificates is limited to minimum of 5 years. In Berlin the research situation is particularly difficult as, while the death certificates are held 3 years by the statistics bureau, this department cannot release any pseudonymous data. In Berlin it is possible to research the cause of death for some of the deceased through the doctors and hospitals that issued the death certificates and through the GKR Berlin-Brandenburg (in keeping with the special data protection measures of the cancer registry). In North Rhine Westphalia the written consent obtained during people's lifetimes, including an explicit release from medical confidentiality, is required to carry out cause of death research. In all other German states exceptions are possible, in all cases requiring the consent of the state's data protection commissioners. The results of the pilot project underline the need for a national mortality register. Until this is established the approach used in the pilot study can be used and, working together with the state and national data protection authorities and with the highest national health authorities, can be further optimized in order to avoid losing data and to use resources efficiently.

[The (German) Center for Cancer Registry Data (ZfKD) at the Robert Koch Institute (RKI) in Berlin]. / Das Zentrum für Krebsregisterdaten (ZfKD) im Robert Koch-Institut (RKI) in Berlin.

Cancer represents the second most common cause of death in Germany. The country's federal states operate regional population-based cancer registries that collect and analyze data on cancer patients. This provides an essential basis for describing the cancer burden in the German population. In order to obtain valid and reliable information on cancer incidence at the national level, the Robert Koch Institute (RKI) set up the Federal Cancer Surveillance Unit in 1983 as a central institution for evaluating this cancer registry data. In August 2009, when the Federal Cancer Registry Data Act (BKRG) came into force, the Center for Cancer Registry Data (ZfKD) at the RKI took over the work of the Cancer Surveillance Unit with a broader remit. In the future, it will also regularly publish findings on survival, prevalence, and tumor stage distribution. A newly established record linkage process will help identify multiple submissions from the federal states. Further innovations and new tasks of the ZfKD include expanding an interactive Internet platform and encouraging a more intensive use of cancer registry data for epidemiological research by providing datasets to external scientists. The range of information available to the interested public is also to be expanded.

[Which implications for obesity prevention can be offered by the KiGGS follow-up study?]. / Welche Ansatzpunkte zur Adipositasprävention bietet die KiGGS-Kohorte?

From 2003-2006, the health status of 17,641 girls and boys was comprehensively assessed by interview and medical examinations in the nationwide German Health Interview and Examination Survey for Children and Adolescents (KiGGS). Therewith, data exists for a broad spectrum of health relevant questions in childhood and adolescence, including indicators, determinants and consequences of obesity. As part of the health monitoring system of the Robert Koch Institute, KiGGS is being continued as a longitudinal study. This enables the observation of health development of children and adolescents up to adulthood as well as the detection of changes in behavior and circumstances within this population. This offers many new perspectives for analyses, whose findings may be helpful for the prevention of obesity. Current insights and future perspectives are discussed.

[Overweight and obesity in children and adolescents in Germany]. / Ubergewicht und Adipositas bei Kindern und Jugendlichen in Deutschland.

The increasing prevalence of overweight and obesity is a reason for concern not only in Germany but also in other countries. There are various methods and data sources that can be used to assess the extent of this public health problem. The present publication gives an overview of the reference systems that are in use in Germany to assess body mass index (BMI), which is calculated from height and weight, and an overview from several data sources: the school entry examinations, the HBSC study of the WHO, and the German Health Interview and Examination Survey for Children and Adolescents (KiGGS). Current prevalence estimates are based on the KiGGS survey, which found that, based on the Kromeyer-Hauschild reference system, 14.8% of the children and adolescents in Germany aged 2-17 years are overweight, including 6.1% suffering from obesity. In absolute numbers referring to the most recent population numbers, this corresponds to 1.7 million overweight children and adolescents in Germany aged 2 years and older, 750,000 of whom are obese. This description of the status quo represents the benchmark for all future studies of BMI that aim at assessing temporal trends and, thus, the efficacy of national prevention and intervention programs. Regular examinations of certain age groups of children and adolescents in Germany, such as the school entry examinations, can be used for the assessment of temporal trends, if certain standards are followed during the examination. Studies that rely on self-reported height and weight instead of measurements, such as the German part of the HBSC study, however, need a correction based on the subjective body perception. The KiGGS participants themselves are also subject to follow-up interviews and examinations. Thus, it will be possible to regularly update the assessment of the prevalence of overweight and obesity. The Kromeyer-Hauschild reference system should not be replaced by the KiGGS BMI data, in order not to artificially lower the prevalences of overweight and obesity. It should, however, not be used for children below 2 years of age.

Body mass index percentiles for children and adolescents in Germany based on a nationally representative sample (KiGGS 2003-2006).

OBJECTIVE: To present body mass index (BMI) percentiles representative for children in Germany and to compare them with the currently used percentiles by Kromeyer-Hauschild (KH) and international percentiles of the World Health Organisation (WHO) and the International Obesity Task Force (IOTF). METHODS: Representative examination survey of 17 641 children and adolescents aged 0-17 years living in Germany (KiGGS 2003-2006 study, response rate 67%) with standardized measurement of height and weight. RESULTS: Generally, BMI in KiGGS was higher than in the reference populations from previous decades. KiGGS shows an asymmetric upward shift of the BMI distribution from about age 6 years and an earlier adiposity rebound compared with KH. The BMI peak in the first year of life is shown by KiGGS and WHO, but much less by KH. The cut-offs for overweight and obesity determined with the IOTF methodology in KiGGS (percentiles corresponding to BMI 25 and 30 kg/m(2) at 18 years of age) were similar to IOTF cut-offs from age 18 to 10 years but systematically lower for younger children. CONCLUSIONS: The KiGGS BMI percentiles appear more valid for Germany than present alternatives and should be used for population monitoring. Despite their methodological limitations, the general shape of the older German KH references is confirmed by KiGGS for the ages 2-17 years. In order not to obscure the increase in obesity rates in the last decades, we therefore propose to continue using KH for individual diagnosis and estimation of the prevalence of overweight and obesity in this age range.

[Development and implementation of health targets for children and adolescents. What contribution can the Robert Koch Institute's National Health Interview and Examination Survey for Children and Adolescents (KiGGS) make?]. / Entwicklung und Evaluation der nationalen Gesundheitsziele für Kinder und Jugendliche. Welchen Beitrag leistet der Kinder- und Jugendgesundheitssurvey des Robert Koch-Instituts (KiGGS)?

Health targets are increasingly becoming a health-policy control instrument, both nationally and internationally. In the project gesundheitsziele.de, targets have been formulated for children and adolescents in Germany - currently in the areas of nutrition, exercise, and stress management. Implementing and evaluating health targets requires regularly updated, informative data that allow a comprehensive and precise description of the relevant problems and developments. The Robert Koch Institute's National Health Interview and Examination Survey for Children and Adolescents - conducted during the period from 2003 to 2006 - provides a pool of data with information on virtually all facets of health development during childhood and adolescence which can be used to determine the starting point of the health-targeting process. This article describes the data provided by the survey of the areas nutrition, exercise, and stress management and the contribution these data could make towards further developing and implementing the health targets for children and adolescents.

[Regional differences in the prevalence of overweight and obesity at school entry in Germany : reality or artifact?]. / Regionale Unterschiede in der Häufigkeit von Ubergewicht und Adipositas bei deutschen Einschülern : Realität oder Artefakt?

Discovering trends and regional differences in the prevalence of overweight and obesity in children and adolescents is an important task, bearing in mind the high public health relevance of this widespread health risk. It is all the more important to ensure a common methodological basis for the calculations underlying statements about trends and comparisons. Using the data of the German Health Examination Survey for Children and Adolescents (KiGGS), the potential effects of two methodological sources of error when calculating overweight and obesity prevalence at school entry are presented. Finally, simple recommendations for avoiding these errors are given.

[Health monitoring at the Robert Koch Institute. Status and perspectives]. / Gesundheitsmonitoring am Robert Koch-Institut. Sachstand und Perspektiven.

Since January 2008, the Robert Koch Institute (RKI) has been administrating a Health Monitoring System, i.e., health examination surveys and health interview surveys with longitudinal components being alternatingly performed. These surveys are continuously accompanied by annual cross-sectional interview surveys of the population living in Germany. The content and structure of the Health Monitoring System is explained and the actual on-going surveys are described in this paper. An overview of future surveys and their integration within the European context demonstrates the new quality in utilizing the data obtained by longitudinal and cross-sectional analyses for health reporting, health policies and health sciences.

[Personal, familial and social resources and health-related quality of life in children and adolescents with chronic conditions]. / Personale, familiäre und soziale Schutzfaktoren und gesundheitsbezogene Lebensqualität chronisch kranker Kinder und Jugendlicher.

INTRODUCTION: The present publication describes chronic conditions of children and adolescents (asthma, ADHD, obesity) in relation to personal, familial and social resources and to health-related quality of life (HRQOL). A database of these investigations is the German health interview and examination survey of children and adolescents (KiGGS), which is representative for 0 to 17 year-olds. The above mentioned chronic conditions occur frequently in this age group and are assumed to have an influence on quality of life and to be related to a lower level of protective factors. METHODS: The investigations used the data of 6813 children and adolescents within the age group of 11 to 17 who participated in the KiGGS study. Information about diagnosed chronic conditions was given by the parents within the framework of the computerassisted medical interview (CAPI) and by completing questionnaires. The personal, familial and social protection factors as well as the quality of life were assessed by the questionnaires, filled in by the adolescents themselves. Instruments used were the Social Support Scale, the Family Climate Scale and KINDL-R. RESULTS: Children and adolescents with asthma seem to have no deficits in the health-related quality of life and in the field of protective factors. This differs from the situation of the obese children as well as from the children with ADHD. Both groups show significant deficits in the health-related quality of life and protection factors. DISCUSSION: The chronic conditions investigated show remarkable differences in the scale values for measuring protective factors and health-related quality of life. Possible explanations are: For asthma as a chronic disease with somatic manifestation effective treatments and therapies exist, so that it has nearly no influence on the self-assessed quality of life. ADHD and obesity result in a decrease of quality of life and in the field of protective factors, possibly caused by social stigmatisation, isolation and demotivation of the concerned children and adolescents. Therefore it is important to support those children and adolescents to cope with their disease-related problems. The results illustrate that in addition to the immediate effects of chronic conditions on the concerned children and their families, it is the quality of life and the familial and social environment that should be specifically addressed in further studies.