[Skin cancer screening in the aging population in Saxony-Anhalt : Utilization, facilitating, and hindering factors]

BACKGROUND

Statutory skin cancer screening (gHKS) can counteract severe courses of various types of skin cancer. The example of malignant melanoma shows that screening is important for older adults in view of the average age of onset of this disease: 62 (women) and 68 years (men). For Saxony-Anhalt (ST), as a state particularly affected by demographic change, little gHKS data are available regarding its usage.

OBJECTIVES

For the study, gHKS participation rates for persons aged 55 and older are presented for ST in comparison to the rest of Germany. Reasons for and barriers to participation from those eligible as well as possible fields of action are shown.

MATERIALS AND METHODS

For the target group, outpatient billing data from the Central Institute for Statutory Health Insurance Physicians in Germany (Zi) on gHKS from 2011-2020 are cross-sectionally and longitudinally analysed. Guideline-based telephone interviews with 18 residents using qualitative content analysis according to Kuckartz serve to identify reasons for and barriers to the use of gHKS.

RESULTS

The gHKS was rarely and irregularly used in ST and other federal states of Germany from 2011-2020; the annual utilisation rate was about 8.0% (national average: 8.4%). Between 2011 and 2020, 50% of eligible people aged 55 years and older did not participate in the gHKS. The highest utilisation rates were among men aged 70-79 years. In addition to district-specific differences, which indicate possible gaps in care, information deficits appear to be the main reason for low participation.

CONCLUSION

The low utilisation of gHKS, partly due to a lack of information among those entitled to it, requires target group-specific information services.

[Determinants of the utilization of cancer screening among older adults in Saxony-Anhalt-What is the influence of health literacy?]

BACKGROUND

In order to preserve health and thus social participation, it is important for older people to make health-related decisions, such as those regarding the use of a secondary prevention service like cancer screening. National and international studies show that various predictors determine cancer screening participation. The aim of this study is to determine the cancer screening utilization of older people in a structurally weak region.

METHODS

In 2021, a cross-sectional study in each of two urban and rural communities in Saxony-Anhalt surveyed individuals aged 55 years and older about determinants, reasons, and barriers to preventive service use (n = 954). Binary logistic regression analysis is used to analyze determinants of cancer screening use.

RESULTS

Three quarters of the study population (76.6%) self-reported participating in a cancer screening service at least once. The multivariable analyses demonstrate factors that influence the utilization of cancer screening. Age, partial knowledge on cancer screening, cancer screening as a benefit offered by a statutory health insurances' bonus program, experience with cancer in the immediate environment, thoughts about one's own health, and the feeling of security that participation gives are factors that significantly influence the use of cancer screening. Descriptively, the physician's recommendation is the strongest factor for participation.

CONCLUSION

The analyses show that cancer screenings are generally well received by older people in Saxony-Anhalt, but participation in them is not related to health literacy. In keeping with the National Cancer Plan, older people should generally be supported in making an informed decision, for example, through target-group-specific physician education.

Cohort profile: a longitudinal regional cohort study to assess COVID-19 seroprevalence in blood donors - baseline characteristics of the SeMaCo study participants

PURPOSE

The SeMaCo study (Serologische Untersuchungen bei Blutspendern des Großraums Magdeburg auf Antikörper gegen SARS-CoV-2), a prospective, longitudinal cohort study with four survey phases spanning 3-5 months each over a period of 22 months, extends the spectrum of seroepidemiological studies in Germany. We present here a careful characterisation of the initial survey phase of the cohort to provide baseline data on infection incidence and obtained from questionnaires, focussing in particular on the attitude towards COVID-19 vaccinations, the vaccination success and the vaccination acceptance.

PARTICIPANTS

A total of 2195 individual blood donors from the donor pool of the blood donation service of the University Hospital Magdeburg were enrolled in the initial survey phase from 20 January 2021 to 30 April 2021. 2138 participants gave sociodemographic/contact data (51.7% male, mean age 44 years) and 2082 participants answered the vaccination questionnaire.

FINDINGS TO DATE

Out of 2195 participants with antibody results, 1909 (87.0%) were antibody negative. The remaining 286 subjects (13.0%) were either antibody-positive and vaccinated (160/286; 55.9%) or antibody-positive without vaccination information (17/286; 5.9%) or antibody-positive and unvaccinated (109/286; 38.1%). The latter result reflects the rate of true or highly probable SARS-CoV-2 infections in our initial study cohort.

FUTURE PLANS

The study primarily aims to measure the prevalence and long-term kinetics of IgG-antibodies against SARS-CoV-2. Including the baseline, the study foresees four survey periods of 3-4 months each. At each visit, we will assess the blood donors' attitude towards vaccination, the antibody response following vaccination and/or infection, as well as undesired vaccination effects. We aim to test the same participants during the survey periods by repeated invitations for blood donation to ensure a long-term (follow-up) in as many study participants as possible. After the four survey phases, a longitudinal data set will be created that reflects the course of the antibody levels/frequencies as well as the infection and vaccination incidence.

TRIAL REGISTRATION NUMBER

DRKS00023263.

[Research Data Center on Health - Vision for Further Development from the Research Perspective]

The German research data center for health will provide claims data of statutory health insurances. The data center was set up at the medical regulatory body BfArM pursuant to the German data transparency regulation (DaTraV). The data provided by the center will cover about 90% of the German population, supporting research on healthcare issues, including questions of care supply, demand and the (mis-)match of both. These data support the development of recommendations for evidence-based healthcare. The legal framework for the center (including §§ 303a-f of Book V of the Social Security Code and two subsequent ordinances) leaves a considerable degree of freedom when it comes to organisational and procedural aspects of the center's operation. The present paper addresses these degrees of freedom. From the point of view of researchers, ten statements show the potential of the data center and provide ideas for its further and sustainable development.

Digital Health Information Provided by Public Health Stakeholders on Colorectal Cancer Screening: A Systematic Evaluation

In the federal state of Germany, Saxony-Anhalt, colorectal cancer is the second most frequent cause of death among cancer patients. In order to identify cancer precursors early, colorectal cancer screenings are essential. In this context, health information contributes to informing individuals and imparting them with necessary knowledge to make a decision about (non-)utilization of preventive services. Numerous public health stakeholders (e.g., statutory health insurances) provide health information. This study aimed to evaluate the quality of web-based health information offered by public health stakeholders in Saxony-Anhalt, Germany. A systematic evaluation was used. A search was performed using pre-defined eligibility criteria and search terms. Two independent reviewers assessed the search results based on seven main categories (60 items) developed by the study team in line with the "Guideline Evidence-based Health Information". In total, 37 materials from 16 different stakeholders were included and yielded a "mediocre quality" (median = 69%). The materials had only partially fulfilled the requirements of national recommendations for evidence-based health information. Access to digital health information regarding colon cancer screening was unsatisfactory, especially for individuals with auditory or visual impairments, due to use of inappropriate communication technologies. Further efforts are required to improve digital health information about colorectal cancer screening.

Regional Utilization of Preventive Services in the 55-Plus Age Group: Protocol for a Mixed Methods Study

Background

In Germany, the proportion of people with chronic diseases and multimorbidity is increasing. To counteract the emergence and worsening of age-related conditions, there is a need for preventive care structures and measures. The preventive services that are financed by statutory health insurance (SHI; eg, vaccinations, cancer screening) are only used by part of the German population. There are no current findings about the utilization of these services by older adults in the eastern German federal state of Saxony-Anhalt, which is particularly strongly affected by demographic change.

Objective

The aim of this study is to investigate the actual utilization and determinants of, reasons for, and barriers to utilization of preventive services financed by the SHI in Saxony-Anhalt in the 55-plus age group.

Methods

In this study, a convergent mixed methods design is used. The actual use of preventive services will be shown by means of (1) a claims data analysis looking at data on statutory outpatient medical care from both the Central Research Institute of Ambulatory Health Care in Germany (Zi) and the Association of Statutory Health Insurance Dentists in Saxony-Anhalt (KZV LSA). The determinants, attitudes, and behaviors associated with use will be analyzed through (2) a cross-sectional survey as well as (3) qualitative data from semistructured interviews with residents of Saxony-Anhalt and from focus group discussions with physicians. (4) A stock take and systematic evaluation of digitally available informational material on colorectal cancer screening, by way of example, provides an insight into the information available as well as its quality. The conceptual framework of the study is the behavioral model of health services use by Andersen et al (last modified in 2014).

Results

(1) The Zi and KZV LSA are currently preparing the requested claims data. (2) The survey was carried out from April 2021 to June 2021 in 2 urban and 2 rural municipalities (encompassing a small town and surrounding area) in Saxony-Anhalt. In total, 3665 people were contacted, with a response rate of 25.84% (n=954). (3) For the semistructured interviews, 18 participants from the 4 different study regions were recruited in the same period. A total of 4 general practitioners and 3 medical specialists participated in 2 focus group discussions. (4) For the systematic evaluation of existing informational material on colorectal cancer screening, 37 different informational materials were identified on the websites of 16 health care actors.

Conclusions

This study will provide current and reliable data on the use of preventive services in the 55-plus age group in Saxony-Anhalt. It will yield insights into the determinants, reasons, and barriers associated with their utilization. The results will reveal the potential for preventive measures and enable concrete recommendations for action for the target population of the study.

Trial Registration

German Clinical Trials Register DRKS00024059; https://www.drks.de/drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00024059

International Registered Report Identifier (IRRID)

DERR1-10.2196/33512

Practical training in medical sociology "Analysis of social environments of living quarters". A field experiment during the COVID-19 pandemic

Background: In the summer semester 2020, a new format was introduced at the Otto-von-Guericke-University Magdeburg for first-year medical students in the subject of medical sociology with a neighborhood-related social environment analysis. Didactic approach: Due to the COVID-19 pandemic, the didactic concept had to be changed at short notice from seminar group-related fieldwork in different districts of Magdeburg to individual work at the place of study or home, supplemented by accompanying online offers. The students were asked to characterize their neighborhood in terms of quality of life, health and illness as well as medical care by means of interviews with inhabitants of their immediate living environment, a neighborhood inspection with the taking of photographs and an analysis of official secondary data. The aim was to gain initial experience in scientific work (data collection, presentation and interpretation of results, as well as reporting). An evaluation of this new course and conclusions derived from it for its further development will be reported. Evaluation: 51 percent of the students participated in an evaluation of the course. The clear majority rated the internship as "good" or "very good". As a suggestion for improvement, the desire for optional supplementary individual counseling and better formal preparation for the performance assessments were expressed several times. Two thirds of those surveyed consider the online teaching format to be useful even in post-pandemic times.

Good Practice Data Linkage (GPD): A Translation of the German Version

The data linkage of different data sources for research purposes is being increasingly used in recent years. However, generally accepted methodological guidance is missing. The aim of this article is to provide methodological guidelines and recommendations for research projects that have been consented to across different German research societies. Another aim is to endow readers with a checklist for the critical appraisal of research proposals and articles. This Good Practice Data Linkage (GPD) was already published in German in 2019, but the aspects mentioned can easily be transferred to an international context, especially for other European Union (EU) member states. Therefore, it is now also published in English. Since 2016, an expert panel of members of different German scientific societies have worked together and developed seven guidelines with a total of 27 practical recommendations. These recommendations include (1) the research objectives, research questions, data sources, and resources; (2) the data infrastructure and data flow; (3) data protection; (4) ethics; (5) the key variables and linkage methods; (6) data validation/quality assurance; and (7) the long-term use of data for questions still to be determined. The authors provide a rationale for each recommendation. Future revisions will include new developments in science and updates of data privacy regulations.

Sonderheft Methodische Aspekte der Sekundärdatenanalyse

Mit dem vorliegenden zweiten Sonderheft zu Datenlinkage und spezifischen Methoden der Sekundärdatenanalyse ergänzen wir die neun Beiträge, die im vorangegangenen Sonderheft methodische Herausforderungen bei der Aufbereitung und Validierung verschiedener Sekundärdatenquellen thematisiert haben. Ein besonderes Augenmerk liegt auf dem individuellen Datenlinkage verschiedener Sekundärdatenquellen untereinander und/oder mit Primärdaten. Dieser methodische Zugang hat nicht erst seit der Bestandsaufnahme zum Datenlinkage in Deutschland 1 und der Veröffentlichung der Guten Praxis Datenlinkage 2 zunehmende Relevanz in der Epidemiologie und Versorgungsforschung erhalten. Daneben werden in diesem Heft aktuelle Ansätze zur Datenvalidierung, zur Kontrollbildung und zur Aufbereitung und Nutzung von Klartextangaben vorgestellt.

Sonderheft Methodische Aspekte der Sekundärdatenanalyse (I)

Die wissenschaftliche Nutzung von Sekundärdaten, nicht allein von solchen der gesetzlichen Krankenversicherung (GKV), hat sich in den vergangenen Jahren fest in der Versorgungsforschung etabliert. Das zeigen das Memorandum Methoden der Versorgungsforschung 1 und Grundlagenwerke der Sekundärdatenanalyse 2. Gleichwohl entwickelt sich eine hohe Dynamik in diesem Forschungszweig, einerseits durch die zahlreichen durch den Innovationsfonds des Gemeinsamen Bundesausschusses (G-BA) geförderten Projekte mit Nutzung von Sekundärdaten, andererseits durch die rasant zunehmenden wissenschaftlichen Studien mit einem individuellen Datenlinkage von Primär- und Sekundärdaten oder Sekundärdaten unterschiedlicher Dateneigner. Weiterhin geraten zunehmend Sekundärdaten jenseits der weithin bekannten GKV-Abrechnungsdaten in den Fokus der Wissenschaft. Daher erscheint es den Herausgebern sinnvoll, ergänzend zu den in früheren Jahren etablierten oder neu publizierten Standards der Sekundärdatenanalyse 3 4 5 einen breiten methodischen Überblick zu geben über die für die Sekundärdatenanalyse zugänglichen Datenquellen, über methodische Herausforderungen bei deren Erschließung, Validierung und Aufbereitung sowie neue methodische Ansätze bei der Analyse der Daten zu diskutieren.

Sonderheft Methodische Aspekte der Sekundärdatenanalyse (II)

Mit dem vorliegenden zweiten Sonderheft zu Datenlinkage und spezifischen Methoden der Sekundärdatenanalyse ergänzen wir die neun Beiträge, die im vorangegangenen Sonderheft methodische Herausforderungen bei der Aufbereitung und Validierung verschiedener Sekundärdatenquellen thematisiert haben. Ein besonderes Augenmerk liegt auf dem individuellen Datenlinkage verschiedener Sekundärdatenquellen untereinander und/oder mit Primärdaten. Dieser methodische Zugang hat nicht erst seit der Bestandsaufnahme zum Datenlinkage in Deutschland 1 und der Veröffentlichung der Guten Praxis Datenlinkage 2 zunehmende Relevanz in der Epidemiologie und Versorgungsforschung erhalten. Daneben werden in diesem Heft aktuelle Ansätze zur Datenvalidierung, zur Kontrollbildung und zur Aufbereitung und Nutzung von Klartextangaben vorgestellt.

Sonderheft Methodische Aspekte der Sekundärdatenanalyse

Die wissenschaftliche Nutzung von Sekundärdaten, nicht allein von solchen der gesetzlichen Krankenversicherung (GKV), hat sich in den vergangenen Jahren fest in der Versorgungsforschung etabliert. Das zeigen das Memorandum Methoden der Versorgungsforschung 1 und Grundlagenwerke der Sekundärdatenanalyse 2. Gleichwohl entwickelt sich eine hohe Dynamik in diesem Forschungszweig, einerseits durch die zahlreichen durch den Innovationsfonds des Gemeinsamen Bundesausschusses (G-BA) geförderten Projekte mit Nutzung von Sekundärdaten, andererseits durch die rasant zunehmenden wissenschaftlichen Studien mit einem individuellen Datenlinkage von Primär- und Sekundärdaten oder Sekundärdaten unterschiedlicher Dateneigner.

[Routine Data from Emergency Departments: Varying Documentation Standards, Billing Modalities and Data Custodians at an Identical Unit of Care]

Hintergrund Nicht nur im Kontext der Neuordnung der Notfallversorgung in Deutschland besteht derzeit ein hoher Bedarf an Daten aus Notaufnahmen. Für die Versorgungsforschung bieten sich Daten an, welche auf gesetzlicher Grundlage generiert werden. Unterschiedliche Kostenträger und Abrechnungsmodi stellen eigene Anforderungen an die Dokumentation dieser Routinedaten.

Methodische Herausforderungen Aufgrund der sektoralen Trennung gibt es keinen Datensatz oder Datenhalter, der Auskunft über alle Notaufnahmebehandlungen geben kann. Aus administrativer Sicht gilt die gesamte Notaufnahmebehandlung als ambulant oder stationär, tatsächlich wird die Entscheidung darüber erst während der Versorgung getroffen. Für die stationäre Versorgung existiert ein administratives Notfallkennzeichen, allerdings kein direktes Merkmal für Notaufnahmebehandlungen. Bei Abrechnung ambulanter Fälle über die kassenärztlichen Vereinigungen ist mindestens eine Diagnose (ICD-10-Kode) zu erfassen, versehen mit einem Kennzeichen zur Diagnosesicherheit. Es können mehrere ICD-10-Kodes ohne Hierarchie angegeben werden. Bei stationär behandelten Patienten ist eine Aufnahmediagnose und nach Behandlungsende die Hauptdiagnose und ggf. Nebendiagose(n) an die zuständige Krankenkasse zu übermitteln. Die gesetzliche Unfallversicherung hat eigene Dokumentationsanforderungen.

Lösungsansätze Je nach Forschungsfrage und Studiendesign sind unterschiedliche Vorgehensweisen erforderlich. Stammen die Daten unmittelbar aus Notaufnahmen bzw. Kliniken ist eine Information über den Kostenträger und den Abrechnungsmodus hilfreich. Bei Nutzung von Krankenkassendaten muss die Identifikation von stationär behandelten Patienten in einer Notaufnahme aktuell indirekt erfolgen. Dazu können unter anderem die Parameter Aufnahmegrund und definierte „eindeutige“ Notfall-Diagnosen herangezogen werden. Die fallpauschalenbezogene Krankenhausstatistik hat eigene Limitationen, enthält dafür aber die stationären Fälle aller Kostenträger.

Diskussion Die divergierenden Anforderungen an die administrative Dokumentation verursachen einen hohen Aufwand in den Kliniken. Perspektivisch ist eine Vereinheitlichung der Leistungserfassung und Dokumentation von Notfallbehandlungen aller Kostenarten auch zur Generierung von validen, vergleichbaren und repräsentativen Daten für die Versorgungsforschung erstrebenswert. Die Einführung eines eigenen Fachabteilungsschlüssels würde zur Identifikation von Notaufnahmebehandlungen beitragen.

What understanding of economics do medical students have?

Introduction: Economic topics appear in the medical studies curriculum at different times. Despite socio-political relevance, there is hardly any information about the degree of understanding that medical students have of "economics in medicine". The present study addresses the questions: What understanding of "economics in medicine" do medical students have before the start of the Practical Year? To what extent is economic teaching content understood as "economization" from outside the profession? Method: Magdeburg medical students in the 5^th year of study, who participated in preparatory seminars for the Practical Year (PY) in 2014 and 2015 (60 participants each), assessed the relevance of various seminar topics four months prior to the start of the semester. On the basis of a three-stage qualitative-reconstructive partial evaluation, students' economic understanding is explored through secondary analysis: deductive derivation of the analysis units; integrative basic method ("segmentation", "micro-linguistic detailed analysis", "central theme"); development of a theoretical model by placing the central themes in context following Grounded Theory. Results: Based on the theory, 19 free-text answers with economic reference were identified from the total of all free-text answers. Each answer was assigned to at least one of a total of six themes of the students' understanding of economics: de-professionalizing economization, deciding and working economically, ambivalent requirements for efficiency and equity, the doctor as an entrepreneur, economics as relevant learning content, PY as a conflict-laden setting for economized working and learning. The theoretical model contains social, praxeological and professional references, which can themselves be ambivalent and conflicting. Conclusion: Despite their critical attitude, the surveyed medical students are neither hostile to economics nor do they regard economics in medicine as a taboo subject. Economic learning content is recognized as relevant. Educational formats that tackle the tension between patient and system orientation in a problem-oriented manner can be a productive setting for economic reflection.

[Good Practice Data Linkage]

Individual data linkage of different data sources for research purposes is being increasingly used in Germany in recent years. However, generally accepted methodological guidance is missing. The aim of this article is to define such methodological standards for research projects. Another aim is to provide readers with a checklist for critical appraisal of research proposals and articles. Since 2016, an expert panel of members of different German scientific societies have worked together and developed 7 guidelines with a total of 27 practical recommendations. These recommendations include (1) research aims, questions, data sources and resources, (2) infrastructure and data flow, (3) data privacy, (4) ethics, (5) key variables and type of linkage, (6) data validation/quality assurance and (7) long-term use for future research questions. The authors provide a rationale for each recommendation. Future revisions will include any new developments in science and data privacy.

Linking primary study data with administrative and claims data in a German cohort study on work, age, health and work participation: is there a consent bias?

OBJECTIVES

We analysed the degree and impact of consent bias in the prospective study 'leben in der Arbeit (lidA)' after linking primary interview data with claims data from German statutory health insurance funds as well as with administrative data provided by the German Federal Employment Agency.

STUDY DESIGN

Prospective cohort study.

METHODS

Within two study waves (2011, 2014) primary data were collected based on computer-assisted personal interviews. During interview informed consent to data linkage was obtained. We used binary logistic regression analyses with participants' consent for record linkage as the dependent variable calculating odds ratios (ORs) and 95% confidence intervals (95% CIs) for independent variables. Several sociodemographic, socio-economic and work-related factors were modelled as potential determinants of consent.

RESULTS

A total of 4244 participants took part in both waves. After excluding invalid consent, 4178 participants were included in the analysis. About 3918 (93.8%) of these participants gave their consent to link their primary data with data from at least one source. Within regression analyses only moderate bias was found due to region of residence, apprenticeship, professional affiliations, income and number of diseases. Participants from former West Germany were less likely to have their study data linked with both data sources (OR 0.63 [95% CI 0.42-0.96]) than those from the former East Germany. Participants with no information on income were more likely to refuse consent to both data sources compared to the reference group (net income: under EUR 1000; OR 0.15 [95% CI 0.08-0.30]). Respondents with two (OR 1.37 [95% CI 1.06-1.77]) or three and more diseases (OR 1.30 [95% CI 1.02-1.66]) diagnosed by a doctor agreed more frequently to linking both data sources than participants without disease. There is just a small proportion of variance in consenting explained by the models (R²: 0.063-0.085). Also, only small changes of factors' prevalence were observed in consenters.

CONCLUSIONS

For the first time in Germany, the lidA-study links primary survey data with health claims and administrative employment data. We conclude that there is only a minor relation between the analysed factors and consent behaviour of the participants. A linked data set may be used in further analyses without substantial biases.

[Data linkage - respondents consent without selectivity?]

OBJECTIVE

The lidA Study is designed as a longitudinal survey. The respondent's consent is mandatory for storing sample data. Moreover, the survey data shall be linked with social security data of the Federal Employment Agency and individual's health insurance claims data in case of the respondent's written consent. This essay pursues the issue of whether this methodologically challenging objective of obtaining 3 consents within one study could be met without any selectivity.

METHODOLOGY

The data basis is a cohort study with 2 cohorts of a representative sample of employed individuals subject to social security contributions. The sample was interviewed for the first time in 2011. The analysis dataset comprises 6 585 respondents.

RESULTS

Selectivity analyses prove that the realisation of the first measurement's sample turned out to be representative as well as unbiased. As expected, more respondents stated their willingness to remain in the panel and also consented to linkage of social security data than those who consented to linkage of health insurance claims data. All 3 consents were given without resulting in any bias. Even linking all 3 consents does result in minimal effects of a few subgroups only.

CONCLUSION

A significant number of respondents can be motivated to participate due to proper placement of the questions concerning consent and the provision of insight into the use of the data.

[Individual linkage of primary data with secondary and registry data within large cohort studies - capabilities and procedural proposals]

Some German cohort studies have already linked secondary and registry data with primary data from interviews and medical examinations. This offers the opportunity to obtain more valid information by taking advantage of the strengths of these data synergistically and overcome their individual weaknesses at the same time. The potential and the requirements for linking secondary and registry data with primary data from cohort studies is described generally and illustrated by the example of the "German National Cohort" (GNC). The transfer and usage of secondary and registry data require that administrative and logistic efforts be made over the whole study period. In addition, rigid data protection regulations for using social data have to be observed. The particular strengths of secondary and registry data, namely their objectivity and independence from recall bias, add to the strengths of newly collected primary data and improve the assessment of morbidity endpoints, exposure history and need of patient care. Moreover, new insights on quality and on the added value of linking different data sources may be obtained.

[The significance of a large number of health insurance funds and fusions for health services research with statutory health insurance data in Germany - experiences of the lidA study]

Since 1970 the health insurance system in Germany has shrunk by more than 90% to 132 statutory health insurance funds (SHI) at present. For studies using data from different SHI, this development means a reduction of contacts and a higher workload when requesting data. The latter is due to the fact that fusions bind resources in the health insurance funds. In order to avoid selection in studies among the insured, all SHI must be contacted. Additionally, 15 controlling institutions on the state and national level have to agree as determined in § 75 of the German Social Code number 10. The lidA study - a German cohort study on work, age and health intends to link primary and secondary data from all SHI of those insured who have given their agreement for participation. Since the beginning of the study in 2009 the number of SHI has been reduced by 70. Of the 6 585 interviews in 2011 approximately half of the interviewees agreed in written form that their individual health insurance data can be linked. This portion of the insured is dispersed among 95 SHI. At this point, 11 contracts with SHI are realised (approximately 50% of the insured) and 8 data controlling authorities have been contacted. The problems involved in the fusion of SHI and its meaning for research are explained in this article. The fusion of SHI makes sense for the long term. It will lead to a reduction of contacts and contracts that researchers have to establish in order to analyse the data. Therefore, this article also discusses the alternative of creating a meta-data set of all the data from the different SHI combined.

[Radiotherapy for an adenolymphoma of the parotid gland (Warthin tumor)]

BACKGROUND

With 17.6% of all primary parotid neoformations the benign Warthin's tumor (cystadenolymphoma) is the second common parotid gland tumor. Males > 50 years are affected predominantly. After surgery the recurrence rate is less than 5%. Histomorphologically the tumor is characterized by cystoid ducts lined by epithelial cells as well as lymphoid stroma. The lymphoid component has been described as radioresponsive whereas the epithelial parts are less radiosensitive. Since 1960 only one patient treated by primary radiotherapy has been published.

CASE REPORT

A 77-year-old woman suffered from cystadenolymphoma (maximal diameter 7 cm). Because of its extension and the reduced performance status of the patient surgery was no option. Radiotherapy was performed with a total dose of 50 Gy. Clinically, the tumor regressed completely after 30 Gy, which was confirmed by CT at 6 weeks after completion of radiotherapy. After 6 and 12 months the patient stayed free of tumor. EPICRISIS: In our case the cystadenolymphoma was unusually large (7 cm). Radiotherapy with 50 Gy induced complete tumor regression. The good clinical response after 30 Gy suggests that the necessary dose may be lower for less extended cystadenolymphomas.

CONCLUSION

We present a case of cystadenolymphoma treated by radiotherapy with 50 Gy resulting in a complete remission. Due to missing published experiences no common recommendation for the total dose can be given. In the following situations radiotherapy should be considered: 1. high surgical risk of damage to the facial nerve, 2. unfavorable cosmetic outcome after surgery, 3. inoperability for internal risks, 4. refusal of operation.