Pruritus is the most frequent symptom in dermatology. Its impact on quality of life is substantial. Epidemiological data on chronic pruritus (>6 weeks) at the population level is sparse, but is important in order to understand the burden and risk factors of this distressing symptom. The aim of this population-based cross-sectional study was to estimate the point, 12-month and lifetime prevalence of chronic pruritus, assessing its association with sociodemographic variables and describing its characteristics. A validated postal questionnaire was sent to 4,500 individuals in from the German General population. Three contact attempts were made. The response rate was 57.8% (n=2,540). The point prevalence of chronic pruritus was 13.5% (95% confidence interval (95% CI) 12.2-14.9%), 12-month prevalence 16.4% (15.0-17.9%) and lifetime prevalence 22.0% (20.4-23.7%). Multivariate analyses found only ethnic origin independently associated with chronic pruritus. The impact of chronic pruritus on quality of life and emotional well-being appears to depend on severity rather than on the presence of the symptom alone. This is the first study to investigate various prevalence estimates of chronic pruritus at the population level. Despite its limitations (self-report and potential self-selection) this study indicates a high burden of chronic pruritus in society.

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Epidemiological data on chronic pruritus (> 6 weeks) in the general population are sparse. We aimed to provide data on the incidence and prevalence of chronic pruritus, and identify its determinants based on cross-sectional and longitudinal analyses. A cohort of 1,190 participants from a cross-sectional baseline-study (response rate: 57.8%) was followed up after one year. The questionnaire assessed occurrence of chronic pruritus, medical, lifestyle and psychosocial variables. Incident chronic pruritus was defined as reported chronic pruritus at follow-up in those subjects free-of-the-symptom at baseline. Cross-sectional analyses of data from the follow-up assessments addressed potential associations of medical, lifestyle and psychosocial factors with prevalent chronic pruritus. Longitudinal analyses examined sociodemographic factors as potential predictors of incident chronic pruritus. The follow-up response rate was 83.1%. The mean age of subjects was 56 years, and 58% were female. The 12-month cumulative-incidence equalled 7.0% (95% confidence interval (95% CI) 5.2-9.2%. Lifetime prevalence was 25.5% (95% CI 21.8-27.8%). Incidence was significantly associated with age. Determinants of prevalent chronic pruritus in multi-variable analyses were: liver disease, asthma, eczema and dry skin within the medical domain, an elevated body mass index within the lifestyle domain and higher anxiety scores within the psychosocial domain. Findings suggest a considerable 12-month incidence and lifetime prevalence and provide important directions for future research.

Background: Medical students have been found to experience considerable stress due to their academic studies. The high demands associated with academic studies may interfere with demands in other domains of life. Conversely, demands in those other domains of life may conflict with academic studies. Objective: We aimed to better understand the potential interrelationships between the demands related to academic studies and in other domains of life. Design: A total of 68 medical students from a medical school in Germany participate in eight focus groups. Sessions were structured by a topic guide and were recorded, transcribed and content-analyzed. Results: Embarking on one's medical studies was perceived to be associated with important personal challenges, such as living alone for the first time and finding a new social role in one's peer group. Permanent stress was perceived to result in emotional exhaustion, which spilled over in other domains of life. Students reported to feel guilty if they did not spend their limited spare time on learning. Consequently, they felt to have little time for leisure time activities and a healthy lifestyle. Feelings of social isolation, especially during exam phases, were reported. Leisure activities were perceived to facilitate recovery from academic stress. Social ties were subjectively able to reduce stress, but also to increase stress due to demands. Side jobs were perceived to increase stress and to be time-consuming and were thus perceived to result in poorer academic performance. Certain personality characteristics seemed to amplify those perceptions. For instance, high levels of conscientiousness were felt to relate to higher expectations regarding one's academic performance and thus increased stress. Conclusion: The demands associated with medical studies, the demands in private life, lacking resources for recovery and certain personal traits as well as interactions between those domains can contribute to stress among medical students and reduce well-being.