Now showing items 1-10 of 2614
Time in the stair-climbing test as a predictor of thoracotomy postoperative complications
Objectives: The stair-climbing test as measured in meters or number of steps has been proposed to predict the risk of postoperative complications. The study objective was to determine whether the stair-climbing time can ...
Comparing diagnostic tests with missing data
(ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD, 2011)
When missing data occur in studies designed to compare the accuracy of diagnostic tests, a common, though naive, practice is to base the comparison of sensitivity, specificity, as well as of positive and negative predictive ...
Predictive model for falling in Parkinson disease patients
Background/aims: Falls are a common complication of advancing Parkinson's disease (PD). Although numerous risk factors are known, reliable predictors of future falls are still lacking. The aim of this study was to develop ...
Can we forecast the implied volatility surface dynamics of equity options? Predictability and economic value tests
We examine whether the dynamics of the implied volatility surface of individual equity options contains exploitable predictability patterns. Predictability in implied volatilities is expected due to the learning behavior ...
The influence of zero-value subtraction on the performance of two laser fluorescence devices for detecting occlusal caries in vitro
Background. The aim of this study was to evaluate the influence of zero-value subtraction on the performance of two laser fluorescence (LF) devices developed to detect occlusal caries. Methods. The authors selected 119 ...