We propose new inference tools for forward stepwise regression, least angle regression, and the lasso. Assuming a Gaussian model for the observation vector y, we first describe a general scheme to perform valid inference after any selection event that can be characterized as y falling into a polyhedral set. This framework allows us to derive conditional (post-selection) hypothesis tests at any ...

OBJECTIVE To identify factors that explain differences in patients with high and low levels of fear of falling after a hip fracture. DESIGN Cross-sectional study in 10 skilled nursing facilities in the Netherlands. PATIENTS A total of 100 patients aged ≥ 65 years admitted to a skilled nursing facility after a hip fracture. METHODS Participants were divided into 2 groups; low and high leve...

aging declines abilities and leads to increased risk of falling and subsequently poorer quality of life. the objective of this study was to identify a proper assessment for risk of falling among institutionalized elderly. in order to accomplish this aim, two functional assessment methods, berg scale and tinetti scale, were used and the validity indices of these methods were calculated. prospect...

We conducted a surreptitious, prospective, cohort study to explore how often physicians nod off during scientific meetings and to examine risk factors for nodding off. After counting the number of heads falling forward during 2 days of lectures, we calculated the incidence density curves for nodding-off episodes per lecture (NOELs) and assessed risk factors using logistic regression analysis. I...

BACKGROUND Fear of falling is not only a risk factor for falls, but it is also an important clinical predictor of functional decline in older adults. This study identified sex differences in fear of falling and related factors in older adults with low grip strength. METHODS The data of 902 older adults from the 2012 Korean National Survey, conducted as a research project by the Korea Employme...