The extensive use of logistic regression models in analytical epidemiology as well as in randomized clinical trials, often creates inflated estimates of the relative risk (RR). Particularly, in cases where a binary outcome has a high or moderate incidence in the studied population (>10%), the bias in assessing the relative risk may be very high. Meta-analysis studies have estimated that about 40% of the relative risk estimates in prospective investigations, through binary logistic models, lead to extensive bias of the population parameters. The problem of risk inflation also appears in cross-sectional studies with binary outcomes, where the parameter of interest is the prevalence ratio. As an alternative to the use of logistic regression models in both longitudinal and cross-sectional studies, the modified Poisson regression model is proposed.

Police crash reports are often the main source for official data in many countries. However, with the exception of fatal crashes, crashes are often underreported in a biased manner. Consequently, the countermeasures adopted according to them may be inefficient. In the case of bicycle crashes, this bias is most acute and it probably varies across countries, with some of them being more prone to reporting accidents to police than others. Assessing if this bias occurs and the size of it can be of great importance for evaluating the risks associated with bicycling. This study utilized data collected in the COST TU1101 action "Towards safer bicycling through optimization of bicycle helmets and usage". The data came from an online survey that included questions related to bicyclists' attitudes, behaviour, cycling habits, accidents, and patterns of use of helmets. The survey was filled by 8655 bicyclists from 30 different countries. After applying various exclusion factors, 7015 questionnaires filled by adult cyclists from 17 countries, each with at least 100 valid responses, remained in our sample. The results showed that across all countries, an average of only 10% of all crashes were reported to the police, with a wide range among countries: from a minimum of 0.0% (Israel) and 2.6% (Croatia) to a maximum of a 35.0% (Germany). Some factors associated with the reporting levels were type of crash, type of vehicle involved, and injury severity. No relation was found between the likelihood of reporting and the cyclist's gender, age, educational level, marital status, being a parent, use of helmet, and type of bicycle. The significant under-reporting - including injury crashes that do not lead to hospitalization - justifies the use of self-report survey data for assessment of bicycling crash patterns as they relate to (1) crash risk issues such as location, infrastructure, cyclists' characteristics, and use of helmet and (2) strategic approaches to bicycle crash prevention and injury reduction.

The current paper aimed at investigating factors affecting the perceptions and attitudes of faculty members towards inclusive education for students with disabilities in a Greek University. A questionnaire, based on the “Expanding Cultural Awareness of Exceptional Learners-ExCEL” was distributed online to 311 faculty members, during the first semester of 2020. The questionnaire explored participants’ sociodemographic and academic background, prior training and personal experience with disability, perceived knowledge, beliefs and attitudes towards inclusive education practices. A total of 80 questionnaires were completed (males 56.3%; aged 41–50 years 43.7%; working experience > 16 years 52.4%; prior training on disability 77.5%). Factor analysis identified four constructs relevant to: (a) perceived knowledge regarding the legal framework (“Perceived Knowledge”), (b) intention towards the provision of general accommodations in class (“Help in Class”), (c) intention towards resource provision (“Material Offer”), and (d) beliefs about the provision of accommodations to students with disabilities (“Negative Attitude”). Gender, faculty subject and prior training on disability were shown to affect the participants’ “Perceived Knowledge”, while working position was shown to affect “Material Offer”. Age, working experience, and personal experience with disability did not reveal any significant effect. More research is needed to investigate the attitudinal and practical barriers of faculty members towards meeting students’ educational needs.

This qualitative study provides a comprehensive account of the social and life experiences and strategies and personality attributes that characterize exceptional longevity (living to 100 or over). It is based on nine semi-structured interviews of relatively healthy and functional Greek centenarians of both sexes. The analytic approach was thematic and based on grounded theory. We found that our participants were characterized by selectiveness in their socializing with other people and tendency to avoid conflicts. Also, we found that they predominantly used the “flight” response whenever confronted with stressors. Further, they appeared to be much adaptive as they had managed to overcome adversity and adapt successfully to major life changes. These findings provide insights into three possible pathways (social selectivity, conflict avoidance, and adaptiveness) through which psychosocial factors might be associated with aging and exceptional longevity.