Anteroposterior (AP) pelvic radiographs only give a 2D projection of what is a 3D shape. Depending on the position of the patient while the radiograph is taken, the 2D projection of the shape may vary. This paper investigates the short-term variability of projected proximal femur shape using AP pelvic radiographs. We train a statistical shape model of the proximal femur based on a set of 87 rad...

compared to western countries, pancreatic cancer has a relatively low incidence in iran. it is rarely diagnosed before the fifth decade in iran and most of the patients are older than 60 at the time of diagnosis like to the western countries, where pancreatic cancer is a disease of advanced age. the incidence of the disease in some young patients suggests a possible role of genetic defects, whi...

BACKGROUND Baseline data collected on each patient at randomisation in controlled clinical trials can be used to describe the population of patients, to assess comparability of treatment groups, to achieve balanced randomisation, to adjust treatment comparisons for prognostic factors, and to undertake subgroup analyses. We assessed the extent and quality of such practices in major clinical tria...

Data collected from complex sample surveys are frequently used in secondary data analysis. The analysis of such data using standard statistical software yields biased point estimates of parameters and incorrect standard errors as a result of unequal probabilities of selection of observations, stratification and clustering, and unit nonresponse. The appropriate analysis of data from complex samp...

OBJECTIVES The inherent nature of the Korean National Health and Nutrition Examination Survey (KNHANES) design requires special analysis by incorporating sample weights, stratification, and clustering not used in ordinary statistical procedures. METHODS This study investigated the proportion of research papers that have used an appropriate statistical methodology out of the research papers an...