An Examination of Sleep as a Mediator of the Relationship between Childhood Adversity and Depression in Hispanic and Non-Hispanic Young Adults.

The current study integrates previous research on adverse childhood experiences (ACEs) and long-term health outcomes to examine associations between ACEs, sleep duration, and depression in a diverse, mostly healthy, sample of young adults. We examine whether sleep duration mediates the association between ACEs and depression among young adults, and whether ethnicity may moderate observed relationships between ACEs, sleep duration and depression. Data were collected from 518 young adults (66.

Design Optimization of a Portable Thermophoretic Precipitator Nanoparticle Sampler.

Researchers at the National Institute for Occupational Safety and Health (NIOSH) are developing methods for characterizing diesel particulate matter in mines. Introduction of novel engine and exhaust after treatment technologies in underground mines is changing the nature of diesel emissions, and metrics alternative to the traditional mass-based measurements are being investigated with respect to their ability to capture changes in the properties of diesel aerosols. The emphasis is given to metrics based on measurement of number and surface area concentrations, but analysis of collected particles using electron microscopy (EM) is also employed for detailed particle characterization.

Progression or regression of Barrett's esophagus--is it all in the eye of the beholder?

Objectives: Accurate measurements of Barrett's esophagus length are important in clinical follow-up as well as in studies of therapeutic intervention in Barrett's esophagus. Our aim was to evaluate both the inter- and intraobserver reliability in measuring Barrett's length during two consecutive endoscopies by either the same or different experienced endoscopists. The relationship between Barrett's mucosa length and the absolute change in Barrett's length measurements on a follow-up endoscopy was also evaluated.

A predictive model for length of Barrett's esophagus with hiatal hernia length and duration of esophageal acid exposure.

Background: A significant correlation between the duration and height of esophageal acid exposure and the length of Barrett's mucosa has been demonstrated. The aims of this study were to determine if there is a correlation between hiatal hernia length and Barrett's esophagus length, and to develop a predictive model for Barrett's esophagus length by using hiatal hernia length and duration of esophageal acid exposure.

Methods: Consecutive patients with Barrett's esophagus diagnosed endoscopically were enrolled in the study.