Experimental kickoff rule

dwiebe@upenn.edu Space-time studies

he kickoff return in football, in which athletes run at speed toward each other over a long distance with the potential for significant impacts, has been associated with a substantial number of concussions. In 2015 in the Ivy League, a Division 1 conference of 8 private universities in the National Collegiate Athletic Association (NCAA), kickoffs accounted for 6% of all … Read More


dwiebe@upenn.edu Space-time studies

ReCoUPS – Recovering Concussion Update on Progression of Symptoms. he primary objective of the ReCoUPS study cluster is to utilize an app-based survey tool to measure symptom progression and recovery status of an individual in the days and weeks following a concussion. As the appropriate amount of physical and cognitive activity and exertion after concussion injury is still unclear, ReCoUPS … Read More

Tree cover protecting against violent assault

dwiebe@upenn.edu Space-time studies

reen space and vegetation may play a protective role against urban violence. We investigated whether being near urban tree cover during outdoor activities was related to being assaulted with a gun. We conducted geographic information systems–assisted interviews with boys and men aged 10–24 years in Philadelphia, Pennsylvania, including 135 patients who had been shot with a firearm and 274 community … Read More

Space-time study of school safety

dwiebe@upenn.edu Space-time studies

e are conducting an epidemiologic space-time study of youths’ activities and their safety before, during, and after school. Over a period of 18 months, we are enrolling youth between the ages of 12 and 18 years to participate. These are youth who were injured as a result of violence that occurred at school or during school activities, and required treatment … Read More

Asbestos exposure and associated mortality of residents of a small town

dwiebe@upenn.edu Spatial studies

hronic occupational asbestos exposure is linked to increased rates of both benign and malignant lung disease. There are also studies linking paraoccupational exposure to mesothelioma. However, few have quantified the extent of contributions from non-occupational, environmental exposure. Our study aims to comprehensively characterize asbestos exposure and its related mortality over an extended period of follow up. To do so, we … Read More

Stress associated with public health fieldwork

dwiebe@upenn.edu Space-time studies

iolence is a risk that public health field workers face, and stress is a risk that is experienced even more often than is violence. Occupational stress can lower memory capacity, undermine decision-making processes, and increase stereotyping and bias interpretations. With these issues being germane to public health research, the stress that field workers experience is important to understand. When planning … Read More

Neighborhoods, daily activities, and measuring health risks experienced in urban environments

dwiebe@upenn.edu Space-time studies

tudies of place and health often classify a subject’s exposure status according to that which is present in their neighborhood of residence. One’s neighborhood is often proxied by designating it to be an administratively defined unit such as census tract, to make analysis feasible. Although it is understood that residential space and actual lived space may not correspond and therefore … Read More

Homicide and geographic access to gun dealers in the United States

dwiebe@upenn.edu Space-time studies

irearms are the most commonly used weapon to commit homicide in the U.S. Virtually all firearms enter the public marketplace through a federal firearms licensee (FFL): a store or individual licensed by the federal government to sell firearms. Whether FFLs contribute to gun-related homicide in areas where they are located, in which case FFLs may be a homicide risk factor … Read More

Fears of violence during morning travel to school

dwiebe@upenn.edu Space-time studies

hildren’s safety as they travel to school is a concern nationwide. We investigated how safe children felt from the risk of being assaulted during morning travel to school. Children between 10 and 18 years old were recruited in Philadelphia and interviewed with the aid of geographic information system (GIS) mapping software about a recent trip to school, situational characteristics, and … Read More