Distance Decay

Pun-Cheng, Lilian S.C.

doi:10.1002/9781118786352.wbieg0179

Cited by 23 publications

(12 citation statements)

References 3 publications

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“…We found that people living closer to the store where they were surveyed tended to shop there more often and purchased the highest proportion of foods from that store when compared to customers living further from the store. This idea is consistent with the distance decay theory, which suggests that the interaction among two entities decreases as distance increases (39) . Our finding that shopping frequency was not a statistically significant mediator between distance to the store and dietary outcomes, but that frequency was statistically significantly associated with distance, may suggest that the influence of distance and frequency are interconnected but also distinctly relevant.…”

Section: Discussionsupporting

confidence: 89%

Associations between shopping patterns, dietary behaviours and geographic information system-assessed store accessibility among small food store customers

McGuirt

Laska

et al. 2020

Public Health Nutr.

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Objective: To examine associations between geographic information systems (GIS)-assessed accessibility to small food stores, shopping patterns and dietary behaviours among small food store customers. Design: Residential addresses and customer shopping patterns (frequency of shopping, and previous purchase of fruits and vegetables) were gathered through customer intercept surveys. Addresses were geocoded, and GIS-assessed distance and driving time from the participants’ residence to the store were calculated. Dietary status and behaviours were assessed using an objective non-invasive measure of skin carotenoids, the National Cancer Institute Fruit and Vegetable Screener, and items to assess sugary beverage intake. Associations between distance and driving time, demographics, shopping frequency, prior reported purchase of fruits and vegetables at the store and dietary behaviours were examined. Setting: Small food stores (n 22) across North Carolina. Participants: Cross-sectional convenience samples of English-speaking customers aged 18 years or older (n 692). Results: Participants living closer to the small store had lower income and formal education, were more likely to be Black, more likely to have previously bought fruits and vegetables at the store and more frequently shopped at the store. In adjusted models, skin carotenoids (n 644) were positively associated with distance to the store from home in miles (P = 0·01). Conclusions: Customers who lived closer to the stores were more frequent shoppers and more likely to have previously purchased fruits and vegetables at the store yet had lower skin carotenoids. These results support continued efforts to examine how to increase the availability and promotion of healthful foods at small food retail stores.

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Section: Discussionsupporting

confidence: 89%

Associations between shopping patterns, dietary behaviours and geographic information system-assessed store accessibility among small food store customers

McGuirt

Laska

et al. 2020

Public Health Nutr.

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“…Previous research also suggested that accessibility was among several important factors that influence participation in a cost-offset CSA (CO-CSA) program aimed at reaching low-income individuals (White et al, 2018). This aligns with the geospatial distance decay theory or "friction of distance," where the interaction among two entities decreases as distance increases (Pun-Cheng, 2016). Thus, the further away a person lives from a CSA pickup, the less likely the person is to purchase the CSA, or once purchased, the less likely he or she is to pick it up regularly.…”

Section: Introduction and Literature Reviewsupporting

confidence: 75%

A Mixed-methods Examination of the Geospatial and Sociodemographic Context of a Direct-to-Consumer Food System Innovation

McGuirt

Sitaker

Pitts

et al. 2019

J. Agric. Food Syst. Community Dev.

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“…Travel distance and time are widely recognized factors impacting patients’ access to medical services and their willingness to receive treatment. Residing a long distance from health facilities decreases health service utilization [ 1 – 3 ]—a phenomenon known as the distance decay effect [ 4 ]. Extended travel distances to therapy or inconvenient care locations are barriers to patient care, particularly for those receiving later-line oncology therapy who may have poorer performance status.…”

Section: Introductionmentioning

confidence: 99%

Access to Chimeric Antigen Receptor T Cell Therapy for Diffuse Large B Cell Lymphoma

Snyder¹,

Chung

Jun

et al. 2021

Adv Ther

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Introduction: Geographic access to novel oncology therapies, and the extent to which it may vary by potential sites of care, regions, and population characteristics, is poorly understood. We examined how expanding access to chimeric antigen receptor (CAR) T cell therapy administration sites impacts patient travel distances and time. Methods: We used geographic information system techniques to calculate shortest travel distance and time between patients with relapsed/refractory diffuse large B cell lymphoma (DLBCL) and the nearest CAR T cell therapy administration site in three scenarios: academic hospitals; academic and community multispecialty hospitals; and academic and community multispecialty hospitals plus nonacademic specialty oncology network centers. Main outcome measures were differences in travel distance and time among the scenarios and the relationship between travel time and socioeconomic status, race, rural-urban areas, and non-Hodgkin lymphoma clusters. Non-Hodgkin lymphoma incidence, socioeconomic status, and administration centers were derived from governmental/publicly available data sources. Results: Of 3922 patients eligible for CAR T cell therapy, more than 37% had to travel more than 1 h to the nearest academic hospital. Average travel time and distance were significantly reduced by 23% and 30% (P \ 0.001), respectively, when access was expanded to include community hospitals plus a broader range of oncology specialty treatment centers. Compared to academic hospitals alone, increasing access to include community hospitals decreased time and distance by 7% and 8% (P \ 0.01), respectively. In addition, there would be a lower proportion of sites operating as the only care provider within 25 miles if access was expanded outside of academic hospitals only. Longer travel time was associated with lower socioeconomic status. Conclusion: Many patients with DLBCL have long travel times to an academic hospital that Karen C. Chung was an employee of Juno Therapeutics, a Celgene Company, prior to the acquisition of Celgene by Bristol Myers Squibb.

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Distance Decay

Cited by 23 publications

References 3 publications

Associations between shopping patterns, dietary behaviours and geographic information system-assessed store accessibility among small food store customers

Associations between shopping patterns, dietary behaviours and geographic information system-assessed store accessibility among small food store customers

A Mixed-methods Examination of the Geospatial and Sociodemographic Context of a Direct-to-Consumer Food System Innovation

Access to Chimeric Antigen Receptor T Cell Therapy for Diffuse Large B Cell Lymphoma

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