From the article: Abstract Sub-chronic toxicity studies of 163 non-genotoxic chemicals were evaluated in order to predict the tumour outcome of 24-month rat carcinogenicity studies obtained from the EFSA and ToxRef databases. Hundred eleven of the 148 chemicals that did not induce putative preneoplastic lesions in the sub-chronic study also did not induce tumours in the carcinogenicity study (True Negatives). Cellular hypertrophy appeared to be an unreliable predictor of carcinogenicity. The negative predictivity, the measure of the compounds evaluated that did not show any putative preneoplastic lesion in de sub-chronic studies and were negative in the carcinogenicity studies, was 75%, whereas the sensitivity, a measure of the sub-chronic study to predict a positive carcinogenicity outcome was only 5%. The specificity, the accuracy of the sub-chronic study to correctly identify non-carcinogens was 90%. When the chemicals which induced tumours generally considered not relevant for humans (33 out of 37 False Negatives) are classified as True Negatives, the negative predictivity amounts to 97%. Overall, the results of this retrospective study support the concept that chemicals showing no histopathological risk factors for neoplasia in a sub-chronic study in rats may be considered non-carcinogenic and do not require further testing in a carcinogenicity study.
Introduction. Despite the high number of inactive patients with COPD, not all inactive patients are referred to physical therapy, unlike recommendations of general practitioner (GP) guidelines. It is likely that GPs take other factors into account, determining a subpopulation that is treated by a physical therapist (PT). The aim of this study is to explore the phenotypic differences between inactive patients treated in GP practice and inactive patients treated in GP practice combined with PT. Additionally this study provides an overview of the phenotype of patients with COPD in PT practice. Methods. In a cross-sectional study, COPD patient characteristics were extracted from questionnaires. Differences regarding perceived health status, degree of airway obstruction, exacerbation frequency, and comorbidity were studied in a subgroup of 290 inactive patients and in all 438 patients. Results. Patients treated in GP practice combined with PT reported higher degree of airway obstruction,more exacerbations, more vascular comorbidity, and lower health status compared to patients who were not referred to and treated by a PT. Conclusion. Unequalpatient phenotypes in different primary care settings have important clinical implications. It can be carefully concluded that other factors, besides the level of inactivity, play a role in referral to PT.
INTRODUCTION: The aim of this study was to investigate reasons why people consulted an occupational therapist following cancer treatment, and to examine the outcome of occupational therapy interventions, in the context of multidisciplinary rehabilitation.METHODS: Data from 181 patients were collected retrospectively. The International Classification of Human Functioning and Health (ICF) was used to describe the reasons for occupational therapy consultation. Patients had completed the Canadian Occupational Performance Measurement (COPM) before and after the occupational therapy intervention. Change scores were calculated with a 95% confidence interval and a two-sided p-value obtained from a paired t-test.RESULTS: The reasons for occupational therapy consultation were predominantly within the ICF domain "Activities and Participation". On average, patients improved 3.0 points (95% CI 2.8-3.2) on the performance scale of the COPM, and 3.4 points (95% CI 3.2-3.7) on the satisfaction scale (both: p = <.001).CONCLUSION: The result of this study supports the added value of occupational therapy to cancer rehabilitation, and emphasise the positive effect of occupational therapy on everyday functioning. Controlled clinical studies are needed to strengthen the evidence.
