Browsing by Author "Ogunmayowa, Oluwatosin Thompson"

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    Neighborhood historical redlining, present-day social vulnerability and sports and recreational injury hospitalizations in the United States
    Ogunmayowa, Oluwatosin Thompson (Virginia Tech, 2023-07-14)
    Historical redlining, a discriminatory practice of the 1930s, present-day social vulnerability (SVI), and sports and recreational injury (SRI) hospitalizations are interconnected topics that highlight the intersection of race, class, and health in the United States but the relationships have not been studied to date. Thus, the overall aim of this dissertation is to examine the effects of historical redlining and present-day social vulnerability on SRI hospitalizations in the United States. The first study systematically reviewed studies that examined the relationships between neighborhood characteristics and SRI using multilevel modeling approach. Studies reviewed show that certain neighborhood factors, such as living in urban communities, were associated with increased risk of SRI. The second study examined the association between historical redlining and present-day neighborhood SVI in the United States. Results show that formerly redlined areas have higher SVI presently. The third study examined the association between historical redlining and present-day SRI hospitalization in the United States. Results show that redlining was not associated with increased odds of SRI hospitalizations, but was associated with longer length of hospital stay (LOS) among Black and Hispanic patients, and higher total hospital charges among Hispanic patients. The fourth study examined the association between individual and neighborhood social vulnerability and sports and recreation-related traumatic brain injury (SR-TBI) hospitalizations among pediatric patients in the United States. Results show that Native American children had higher odds of hospitalization for SR-TBI, longer LOS, but lower odds of discharge to post-acute care compared to White children. Older age was associated with higher odds of hospitalization and longer LOS while male sex was associated with shorter LOS for SR-TBI in children. Compared to children with private insurance, children with public insurance had longer LOS while uninsured children had shorter LOS. Also, hospitalization in neighborhood with higher overall SVI was associated with longer LOS. This study advances our knowledge on the impact of structural racism on present-day SRI outcomes and will inform policy makers to prioritize health equity by addressing the underlying social determinants of health and the root causes of disparities in SRI outcomes.
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    Quantifying the Effects of Watershed Size and Land Development on Stream Nutrients
    Ogunmayowa, Oluwatosin Thompson (Virginia Tech, 2020-05-14)
    Excessive nutrient loading from watersheds causes nutrient enrichment and water quality issues in very small streams to large rivers. Nutrient enrichment is exacerbated by urbanization and agricultural land use; however, the magnitude of the problem differs by regional landscape and environmental characteristics. Currently, we do not understand how regional variables moderate these relationships. Thus, the overall objective of this thesis was to investigate how regional landscape and environmental variables moderate developed land cover–stream nutrient relationships across the United States. The first study examined how climate and land use influences the scaling of phosphorus, total nitrogen, ammonia and nitrate loads for very large regions (Mid-Atlantic, Upper Mississippi, Ohio and Missouri) of the U.S. Results show the scaling relationships of nutrient loads with watershed size depends on the nutrient species and differed by region; the magnitude of the relationships was greater in wetter climates and developed watersheds. The second study determined 1) whether the relationships between urban and agricultural land cover intensity and concentrations of phosphorus, total nitrogen, ammonia and nitrate across the U.S., differed by ecoregion, and 2) whether regional landscape and environmental factors explained those differences. The relationships were found to differ by ecoregion and the differences were moderated by regional agriculture, topography and climate where stream nutrients increased more rapidly with anthropogenic land use in regions with high agricultural land use, wetter climates and flatter topography. The study findings will enable water quality managers create region-specific water management strategies for streams impacted by excessive nutrient loads.