In harm's way: Do college students' beliefs about cannabis put them at risk for use?

This study describes beliefs held by college students about cannabis use and examines the association between three specific cannabis beliefs and likelihood of use. 3,720 undergraduate students ages 18 to 25 attending ten colleges in one state. Data were gathered via online survey.

Perception of neighborhood safety and reported childhood lifetime asthma in the United States (U.S.): a study based on a national survey.

Background: Recent studies have emphasized the role of psychosocial stressors as a determinant of asthma, and neighborhoods can be a potential source of such stressors. We investigated the association between parental perception of neighborhood safety and reported lifetime asthma among children.

Methodology/principal Findings: Data for the study came from the 2003-04 National Survey of Children Health (NSCH); a nationally representative cross-sectional sample of children aged 0-17 years.

Factors affecting surveillance data on Escherichia coli O157 infections collected from FoodNet sites, 1996-1999.

To determine the burden of illness caused by Escherichia coli O157 infections in populations in Foodborne Diseases Active Surveillance Network (FoodNet) surveillance areas, we initiated active, laboratory-based surveillance and surveyed laboratories, physicians, and the general public regarding the factors associated with the diagnosis and surveillance of infection with E. coli O157. We evaluated survey responses and site-specific incidence, outbreak, and demographic data during 1996-1999.