The objective of the present study was to provide normative data for Trail Making Test (TMT) time to completion and performance errors among cognitively normal older adults, and to examine TMT error rates in conjunction with time scores for pre-clinical and clinical Alzheimer's disease (AD) diagnostic decision-making. A sample of 526 individuals was classified into three diagnostic groups (norm...

background: understanding the nature and causes of medical adverse events may help their prevention. this system­atic re­view explores the types, risk factors, and likely causes of preventable adverse events in the hospital sector. methods: medline (1970-2008), embase, cinahl (1970-2005) and the reference lists were used to identify the stud­ies and a structured narrative method used to synthes...