We use novel nonparametric techniques to test for the presence of nonclassical measurement error in reported life satisfaction (LS) and study potential effects from ignoring it. Our dataset comes Wave 3 UK Understanding Society that is surveyed 35,000 British households. finds evidence LS entire as well 26 out 32 socioeconomic subgroups sample. estimate joint distribution latent nonparametrical...

Aim The aim of this study was to obtain more accurate estimates of the liver cancer incidence rate after correcting for misclassification error in cancer registry across Iranian provinces. Background Nowadays having a thorough knowledge of geographic distribution of disease incidence has become essential for identifying the influential factors on cancer incidence. Methods Data of liver canc...

Background.  Given the uncertainty about the ability of a single CD4 count to accurately classify a patient as antiretroviral therapy (ART) eligible, we sought to understand the extent to which CD4 variability results in misclassification at a CD4 threshold of 500 cells/mm3. Methods.  We performed a prospective study of CD4 variability in Malawian human immunodeficiency virus-infected, ART-naiv...

To the Editor: In their article published in the March 2005 edition of Sexually Transmitted Diseases, Peterman et al present evidence that current surveillance definitions for latent syphilis may not be implemented uniformly either between or within jurisdictions. They report confusion regarding some of the case definitions. Based on their findings, other reasoning, and informal evidence, they ...

Background Self-report of nonmedical prescription opioid use (NMPU) is a cornerstone of drug abuse surveillance, policymaking, and treatment service planning, but misclassification creates bias and may confuse or undermine NMPU estimates [1]. We detected old OxyContin (OC) abuse reports long after a reformulated version (OP) was released (August 2010). This study explored sources of possible NM...