The four-card selection task (Wason, 1966) has been one of the most well-known tasks used in the literature on human reasoning. This article aimed to analyze this selection task by item response theory (Lord & Novick, 1968). Japanese undergraduates (N = 327 and 277 in Studies 1 and 2, respectively) responded to up to 10 types of representative Wason selection tasks, including the indicative tas...

BACKGROUND Whereas the prognosis of second kidney transplant recipients (STR) compared to the first ones has been frequently analyzed, no study has addressed the issue of comparing the risk factor effects on graft failure between both groups. METHODS Here, we propose two alternative strategies to study the heterogeneity of risk factors between two groups of patients: (i) a multiplicative-regr...

Methods During 2009, 167 MRSA-infected and 25766 MRSAuninfected control patients were included in a multistate model where occurrence of MRSA infection was the time-dependent exposure and discharge or death was the study endpoint. Infections were stratified by anatomical site. Excess LoS was extracted computing the Aalen-Johansen estimator of the matrix of transition probabilities. 95% confiden...

OBJECTIVE This study aimed to analyze the effect of HbA1c variability on the occurrence of diabetic retinopathy in type 1 diabetes patients. PATIENTS AND METHODS 35,891 patients with childhood, adolescent or adult onset of type 1 diabetes from a large multicentre survey, the German/Austrian prospective documentation system (DPV), were analysed. Cox proportional hazard models were used to exam...