The Perils of Diagnostic Parsimony

Diagnostic Perils in Jaw Pain

Chronic pain in the orofacial region is a common complaint faced by clinicians. It is important for the dentists to have a thorough knowledge of various causes of jaw pain. Most common type reported is toothache. Since toothache is so common, it is important to determine if pain is from odontogenic or nonodontogenic origin. The need for careful diagnosis before undertaking any invasive treatmen...

Perils of parsimony: properties of reduced-rank estimates of genetic covariance matrices.

Eigenvalues and eigenvectors of covariance matrices are important statistics for multivariate problems in many applications, including quantitative genetics. Estimates of these quantities are subject to different types of bias. This article reviews and extends the existing theory on these biases, considering a balanced one-way classification and restricted maximum-likelihood estimation. Biases ...

The perils of snowmobiling.

Snowmobiling is a popular winter sport in Wisconsin, but it can result in serious injury and death. From 1998-2002, 1090 people in Wisconsin were hospitalized due to injuries related to snowmobiling. From 2002 to 2004, 51 snowmobile-related fatalities were reported to the Wisconsin Department of Natural Resources. Multiple risk factors exist for snowmobile injury and death, with alcohol consump...

The Perils of Presidentialism

The perils of connectivity.