RESUMEN
BACKGROUND: There are detailed reviews about different recruitment strategies, but not with regard to differences between recruitment of hospital-based versus office-based physicians. Within this study, the two different recruitment schemes are compared. Advantages and disadvantages of different ways of recruitment in registry-based studies are discussed. METHODS: In a cross-sectional cancer-registry-based study, long-term melanoma patients were contacted by dermatologists rather than directly by the registry on the basis of the legal situation. Logistic regression models and generalized estimating equations were used to assess effects of various patient and physician characteristics on participation and data quality. Especially differences between hospital-based versus office-based dermatologists are evaluated. RESULTS: Seventy two out of 112 contacted dermatologists took part in the study (64.3%). The cooperation proportion was 52.2% (689 participants/1320 contacted patients). Participants and non-participants differed regarding age and sex, but not regarding other social demographic factors and cancer stage. We did not observe a difference in patient participation between hospital-based versus office-based dermatologists (OR 1.08 [CI 0.84-1.39]; p = 0.57). However, medical data provided by the cancer registry were better for participants registered and recruited by hospitals. CONCLUSIONS: In cohort studies with epidemiological cancer registries, recruitment via physicians has potential disadvantages and is more complex. If this indirect way of contact is mandatory, we recommend recruitment procedures including hospital-based rather than office-based physicians. However, physician characteristics were not associated with outcome.
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Dermatólogos/estadística & datos numéricos , Melanoma/terapia , Selección de Paciente , Sistema de Registros/estadística & datos numéricos , Anciano , Estudios de Cohortes , Estudios Transversales , Femenino , Hospitales , Humanos , Modelos Logísticos , Masculino , Persona de Mediana Edad , Modelos Teóricos , Participación del Paciente/métodos , Encuestas y CuestionariosRESUMEN
BACKGROUND: Laparoscopic assistance is often entrusted to a less experienced resident, medical student, or operating room nurse. Data regarding laparoscopic training for operating room nurses are not available. OBJECTIVES: The aim of the study was to analyse the initial performance level and learning curves of operating room nurses in basic laparoscopic surgery compared with medical students and surgical residents to determine their ability to assist with this type of procedure. DESIGN: The study was designed to compare the initial virtual reality performance level and learning curves of user groups to analyse competence in laparoscopic assistance. PARTICIPANTS: The study subjects were operating room nurses, medical students, and first year residents. METHODS: Participants performed three validated tasks (camera navigation, peg transfer, fine dissection) on a virtual reality laparoscopic simulator three times in 3 consecutive days. Laparoscopic experts were enrolled as a control group. Participants filled out questionnaires before and after the course. RESULTS: Nurses and students were comparable in their initial performance (p>0.05). Residents performed better in camera navigation than students and nurses and reached the expert level for this task. Residents, students, and nurses had comparable bimanual skills throughout the study; while, experts performed significantly better in bimanual manoeuvres at all times (p<0.05). CONCLUSION: The included user groups had comparable skills for bimanual tasks. Residents with limited experience reached the expert level in camera navigation. With training, nurses, students, and first year residents are equally capable of assisting in basic laparoscopic procedures.
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Simulación por Computador , Laparoscopía/educación , Laparoscopía/instrumentación , Enfermería de Quirófano/normas , Análisis y Desempeño de Tareas , Competencia Clínica , Humanos , Internado y Residencia , Laparoscopía/enfermería , Curva de Aprendizaje , Estudiantes de Medicina , Encuestas y CuestionariosRESUMEN
BACKGROUND: Current guidelines do not recommend a preferred treatment modality for locally advanced prostate cancer. The aim of the study was to compare treatment patterns found in the USA and Germany and to analyze possible trends over time. METHODS: We compared 'Surveillance Epidemiology and End Results' (SEER) data (USA) with reports from four German federal epidemiological cancer registries (Eastern Germany, Bavaria, Rhineland-Palatinate, Schleswig-Holstein), both from 2004 to 2012. We defined locally advanced prostate cancer as clinical stage T3 or T4. Exclusion criteria were metastatic disease and age over 79 years. RESULTS: We identified 9127 (USA) and 11 051 (Germany) patients with locally advanced prostate cancer. The share was 2.1% in the USA compared with 6.0% in Germany (P<0.001). In the United States, the utilization of radiotherapy (RT) and radical prostatectomy (RP) was comparably high with 42.0% (RT) and 42.8% (RP). In Germany, the major treatment option was RP with 36.7% followed by RT with 22.1%. During the study period, the use of RP increased in both countries (USA P=0.001 and Germany P=0.003), whereas RT numbers declined (USA P=0.003 and Germany P=0.002). The share of adjuvant RT (aRT) was similar in both countries (USA 21.7% vs Germany 20.7%). CONCLUSION: We found distinctive differences in treating locally advanced prostate cancer between USA and Germany, but similar trends over time. In the last decade, a growing number of patients underwent RP as a possible first step within a multimodal concept.
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Pautas de la Práctica en Medicina , Prostatectomía , Neoplasias de la Próstata/epidemiología , Neoplasias de la Próstata/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Alemania/epidemiología , Humanos , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Vigilancia de la Población , Prostatectomía/métodos , Prostatectomía/estadística & datos numéricos , Neoplasias de la Próstata/diagnóstico , Sistema de Registros , Programa de VERF , Estados Unidos/epidemiologíaRESUMEN
The aim of the study was to explore the relationship between occupational exposure, defined by occupational categories and job title, and laryngeal cancer. A systematic review and meta-analysis of 21 tobacco and alcohol-adjusted case-control studies including data from 6,906 exposed cases and 10,816 exposed controls was performed to investigate the frequency of laryngeal cancer in different occupations. Job classifications were harmonized using the International Standard Classification of Occupations. Pooled odds ratios (OR [95 % confidence intervals (CI)]) were calculated for the different occupational groups. A significantly increased risk of laryngeal cancer was observed for the occupational category of 'production-related workers, transport equipment operators, and laborers' (OR=1.3 [1.2-1.4]); particularly at risk were occupations as: miners (OR=1.6 [1.2-2.1]), tailors (OR=1.7 [1.2-2.3]), blacksmith and toolmakers (OR=1.5 [1.2-1.7]), painters (OR=1.4 [1.1-1.9]), bricklayers and carpenters (OR=1.3 [1.2-1.5]), and transport equipment operators (OR=1.3 [1.2-1.5]). Individuals working as 'professional, technical, and related workers' (OR=0.7 [0.6- 0.8]), 'administrative and managerial workers' (OR=0.6 [0.4-0.7]), or 'clerical and related workers' (OR=0.8 [0.7-0.9]) had laryngeal cancer less frequently. Occupational exposure, defined by occupational categories and job title, is likely to be an independent risk factor for laryngeal cancer. Further research on specific occupations with increased risk of laryngeal cancer is warranted to explore the underlying mechanisms.
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Neoplasias Laríngeas/etiología , Exposición Profesional/efectos adversos , Ocupaciones/estadística & datos numéricos , Humanos , Medición de Riesgo , Factores de RiesgoRESUMEN
BACKGROUND: Nonmelanoma skin cancer (NMSC) is the most common cancer in Germany, but detailed information on survival is lacking. OBJECTIVES: To provide survival estimates for female and male patients with basal cell carcinoma (BCC), squamous cell carcinoma (SCC), sarcoma, adenocarcinoma and Merkel cell carcinoma. Further subgroup analyses were carried out by age, tumour stage and body site. METHODS: In total 459 640 patients diagnosed with NMSC in 1997-2011 were included from population-based cancer registers, covering a population of 33 million inhabitants. Age-standardized absolute and relative 5-year and 10-year survival were calculated using period analysis. RESULTS: The absolute and relative 5-year survival were 87·1% and 102·9% for BCC, 77·6% and 93·6% for SCC, 82·1% and 96·0% for sarcoma, 71·4% and 85·7% for adenocarcinoma and 60·0% and 70·7% for Merkel cell carcinoma, respectively. Higher age, female sex and advanced stage were associated with lower survival. CONCLUSIONS: A comprehensive overview of NMSC survival in Germany is provided. The differences between the NMSC subtypes require a more differentiated consideration of patient survival. The survival advantage of patients with BCC may be related to health-promoting factors related to the BCC diagnosis, such as changes to a healthier lifestyle.
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Neoplasias Cutáneas/mortalidad , Adenocarcinoma/mortalidad , Adolescente , Adulto , Distribución por Edad , Anciano , Anciano de 80 o más Años , Carcinoma Basocelular/mortalidad , Carcinoma de Células de Merkel/mortalidad , Femenino , Alemania/epidemiología , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Sarcoma/mortalidad , Distribución por Sexo , Análisis de Supervivencia , Adulto JovenRESUMEN
BACKGROUND: Epidemiological data on HNC are often reported aggregated despite their anatomical and histological heterogeneity. In Germany, few studies have analyzed incidence and mortality trends separately for specific anatomic sites. Furthermore, little is known about whether the incidence of HPV-associated tumour entities of the head and neck region has increased. METHODS: Based on cancer registry data from Rhineland-Palatinate from 2000 to 2009, age-standardized incidence and mortality rates were calculated for all HNC sites and localisation groups that might be HPV-associated according to the literature. Trends were analyzed by Joinpoint regression and reported as the annual percentage change (APC). RESULTS: Throughout the study period, 8 055 incident cases and 3 177 deaths were identified. The incidence rates of overall HNC increased among women (APC:+2.2%) and declined slightly among men (- 0.9%). Significantly increasing incidence rates among women were seen for tumours of the oral cavity (+2.7%) and the oropharynx (+3.6%). Among men, a significant decrease in incidence rates for tumours of the hypopharynx (-3.4%) and the larynx (-2.7%) are noteworthy. Cancers at HPV-associated sites showed increased incidence rates in men (+3.3%) and women (+4.3%). A decrease in mortality was found for tumours of the larynx in both sexes (-5.8% men,-9.1% women). CONCLUSIONS: A detailed analysis by localisation of HNC showed significant and often opposing trends for men and women regarding incidence and mortality.
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Neoplasias de Oído, Nariz y Garganta/epidemiología , Neoplasias de Oído, Nariz y Garganta/mortalidad , Adulto , Anciano , Estudios Transversales , Femenino , Alemania , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Sistema de Registros , Factores Sexuales , Tasa de Supervivencia/tendenciasRESUMEN
BACKGROUND: The incidence of thyroid cancer (TC), a rare malignancy, has strongly risen in recent decades. Possible causes of this rise include increasing diagnostic activity, nuclear tests after World War II, and the Chernobyl disaster. AIM: This article presents the time trends of TC incidence between 2003 and 2008 in Germany according to histological tumor type and sex, and provides a description of TC incidence according to districts (Kreise) and sex in Germany. METHODS: Data on persons newly diagnosed with thyroid cancer (ICD-10 code, C73) between 2003 and 2008 were obtained from the Center of Cancer Registry Data at the Robert Koch Institute. Official population and mortality data were used. Age-specific and age-standardized incidence rates (ASIR) were calculated according to sex and tumor histology. RESULTS: Between 2003 and 2008, the ASIR of TC rose from 2.7 to 3.4 (men) and from 6.5 to 8.9 (women) per 100,000 per year. This rise can be almost completely attributed to the rising incidence of papillary TC. The steepest rise in frequency was observed in TNM-T1 tumors. A positive north-south gradient of TC incidence was found. DISCUSSION: The cause of the marked rise of TC incidence in recent decades is unknown. The positive north-south gradient of the TC incidence may possibly be attributed in part to long-standing differences of iodine intake between different German regions. CONCLUSION: An epidemiological study of the possible causes of the rising TC incidence and of the regional differences of TC incidence in Germany is recommended.
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Carcinoma/mortalidad , Sistema de Registros , Neoplasias de la Tiroides/mortalidad , Adulto , Distribución por Edad , Anciano , Anciano de 80 o más Años , Carcinoma Papilar , Femenino , Alemania/epidemiología , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Modelos de Riesgos Proporcionales , Factores de Riesgo , Distribución por Sexo , Análisis Espacio-Temporal , Tasa de Supervivencia , Cáncer Papilar TiroideoRESUMEN
BACKGROUND: Laparoscopic novices begin at different performance levels, and studies on tailored training concepts are warranted. The effect of verbal instructor feedback has been investigated with varying results, and its effectiveness in virtual-reality laparoscopic (VRL) simulations still is unclear. This study aimed to determine whether laparoscopic novices with lower initial performance statuses may profit from training with intensive instructor feedback. METHODS: A prospective, single-blinded study was performed within a week-long curricular course. In this study, 20 medical students performed a complex bimanual maneuver on a VRL simulator. There was a division in performance levels, with a high-performer group (HPG) that received a better median score and a low-performer group (LPG). During the training phase, only the initial LPG received standardized instructor feedback in a one-to-one setting. The final assessment of skills for both groups involved performing the task without feedback at the end of the course. RESULTS: The HPG and LPG showed significantly different initial performance levels according global and categorized (time, economics, error) scores (p < 0.005). This difference disappeared quickly throughout the instructor feedback phase. The final assessment demonstrated that both groups were at the same level of performance. CONCLUSION: This is the first study to use a tailored training concept with instructor feedback limited to the LPG. The tailored training was effective and economic for the laparoscopic novices and their teachers.