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Engagement in outdoor physical activity under ambient fine particulate matter pollution: A risk-benefit analysis

Journal of Sport and Health Science 2022年第4期11卷 537-544页

作者： Ruopeng An hyojung kang Lianzhong Cao Xiaoling Xiang Brown School Washington UniversitySt.LouisMO 63130USA Department of Kinesiology and Community Health University of IllinoisChampaignIL 61820USA School of Management and Journalism Shenyang Sport UniversityShenyang 110102China School of Social Work University of MichiganAnn ArborMI 48109USA

Background:Outdoor physical activity(PA)brings important health benefits,but exposure to polluted air increases health *** study aimed to quantify the tradeoff of PA under fine particulate matter(PM_(2.5))air pollution by estimating the optimal PA duration under various pollution ***:A risk-benefit analysis was performed to estimate the optimal outdoor moderate-intensity PA(MPA)duration under varying PM_(2.5) ***:An inverse nonlinear relationship was identified between optimal MPA duration and background PM_(2.5) concentration *** background PM_(2.5) concentration increased to 186 μg/m^(3),the optimal outdoor MPA duration decreased to 2.5 h/week,the minimum level recommended by current PA *** background PM_(2.5) concentration further increased to 235 μg/m^(3),the optimal outdoor MPA duration decreased to 1 h/*** relationship between optimal MPA duration and background PM_(2.5) concentration levels was stronger when exercising at a location closer to a source of air *** to the general adult population,adults aged 60 years and older had substantially steeper curves—the optimal outdoor MPA duration decreased to 2.5 h/week when background PM_(2.5) concentration reached 45 μg/m^(3).Conclusion:The health benefit of outdoor MPA by far outweighs the health risk of PM_(2.5) pollution for the global average urban background concentration(22 μg/m^(3),).This modeling study examined a single type of air pollutant and suffered from measurement errors and estimation *** research should examine other air pollutants and indoor PA,incorporate short-and mid-term health effects of MPA and air pollution into the risk-benefit analysis,and provide estimates specific for high-risk subgroups.

关键词： Air pollution Exercise Physical activity PM_(2.5) Risk-benefit analysis

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Intra-abdominal desmoid tumors mimicking gastrointestinal stromal tumors——8 cases: A case report

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World Journal of Gastroenterology 2019年第16期25卷 2010-2018页

作者： Jwa Hoon Kim Min-Hee Ryu Young Soo Park Hyun Jin Kim hyojung Park Yoon-Koo kang Department of Oncology Asan Medical CenterUniversity of Ulsan College of Medicine Department of Pathology Asan Medical Center University of Ulsan College of Medicine Department of Radiology Asan Medical Center University of Ulsan College of Medicine

BACKGROUND Intra-abdominal desmoid tumors(DTs) can mimic recurrence or progression of gastrointestinal stromal tumors(GISTs). Differential diagnosis is important to avoid unnecessary or inappropriate *** SUMMARY All 8 patients experienced surgical resection of GIST, and median time to diagnosis of DT was 1.8 years after surgical resection. All sites of DT were in the peritoneum around the surgical sites of GIST. The following clinical suspicion coupled with radiological findings contributed to the suspicion of intraabdominal DTs:(1) Occurrence of a new single lesion in the peritoneum around the surgical sites of GIST;(2) uncontrolled lesion with imatinib while other lesions being controlled with imatinib;(3) well-defined ovoid shaped lesion with delayed or mild enhancement and absence of necrosis, hemorrhage, and cystic change on computed tomography; and(4) a lesion showing mild or no hypermetabolic activity on 18 fluorodeoxyglucose-positron emission tomography,contrary to initially hyperactive lesion of GIST. All DTs were surgically removed except for one unresectable DT and only one DT recurred at another site of peritoneum, which was also surgically *** Intra-abdominal DT should be a differential diagnosis for a new single lesion in patients with GIST.

关键词： Desmoid tumor Gastrointestinal stromal tumor Radiology Surgicalresection Imatinib mesylate Case report

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