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Permanent URI for this collectionhttps://hdl.handle.net/20.500.14288/6
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Publication Open Access Capacity planning for effective cohorting of hemodialysis patients during the coronavirus pandemic: a case study(Elsevier, 2023) Bozkır, C.D.C.; Özmemiş, C.; Kurbanzade, A.K.; Balçık, B.; Tuğlular, S.; Department of Business Administration; Güneş, Evrim Didem; Faculty Member; Department of Business Administration; College of Administrative Sciences and Economics; 51391Planning treatments of different types of patients have become challenging in hemodialysis clinics during the COVID-19 pandemic due to increased demands and uncertainties. In this study, we address capacity planning decisions of a hemodialysis clinic, located within a major public hospital in Istanbul, which serves both infected and uninfected patients during the COVID-19 pandemic with limited resources (i.e., dialysis machines). The clinic currently applies a 3-unit cohorting strategy to treat different types of patients (i.e., uninfected, infected, suspected) in separate units and at different times to mitigate the risk of infection spread risk. Accordingly, at the beginning of each week, the clinic needs to allocate the available dialysis machines to each unit that serves different patient cohorts. However, given the uncertainties in the number of different types of patients that will need dialysis each day, it is a challenge to determine which capacity configuration would minimize the overlapping treatment sessions of different cohorts over a week. We represent the uncertainties in the number of patients by a set of scenarios and present a stochastic programming approach to support capacity allocation decisions of the clinic. We present a case study based on the real-world patient data obtained from the hemodialysis clinic to illustrate the effectiveness of the proposed model. We also compare the performance of different cohorting strategies with three and two patient cohorts.Publication Open Access Health system modelling research: towards a whole-health-system perspective for identifying good value for money investments in health system strengthening(BMJ Publishing Group, 2019) Verguet, Stephane; Feldhaus, Isabelle; Kwete, Xiaoxiao Jiang; Aqil, Anwer; Atun, Rifat; Bishai, David; Cecchini, Michele; Guerra Junior, Augusto Afonso; Habtemariam, Mahlet Kifle; Jbaily, Abdulrahman; Kruk, Margaret E.; Haneuse, Sebastien; Norheim, Ole Frithjof; Smith, Peter C.; Tolla, Mieraf Taddesse; Zewdu, Solomon; Bump, Jesse; Department of Business Administration; Karanfil, Özge; Department of Business Administration; College of Administrative Sciences and EconomicsGlobal health research has typically focused on single diseases, and most economic evaluation research to date has analysed technical health interventions to identify 'best buys'. New approaches in the conduct of economic evaluations are needed to help policymakers in choosing what may be good value (ie, greater health, distribution of health, or financial risk protection) for money (ie, per budget expenditure) investments for health system strengthening (HSS) that tend to be programmatic. We posit that these economic evaluations of HSS interventions will require developing new analytic models of health systems which recognise the dynamic connections between the different components of the health system, characterise the type and interlinks of the system's delivery platforms; and acknowledge the multiple constraints both within and outside the health sector which limit the system's capacity to efficiently attain its objectives. We describe priority health system modelling research areas to conduct economic evaluation of HSS interventions and ultimately identify good value for money investments in HSS.Publication Open Access Estimating the potential impact of behavioral public health interventions nationally while maintaining agreement with global patterns on relative risks(Public Library of Science, 2020) Department of Business Administration; N/A; Ali, Özden Gür; Ghanem, Angi Nazih; Üstün, Tevfik Bedirhan; Faculty Member; Faculty Member; Department of Business Administration; College of Administrative Sciences and Economics; Graduate School of Sciences and Engineering; School of Medicine; 57780; N/A; 261811Objective: this paper introduces a novel method to evaluate the local impact of behavioral scenarios on disease prevalence and burden with representative individual level data while ensuring that the model is in agreement with the qualitative patterns of global relative risk (RR) estimates. The method is used to estimate the impact of behavioral scenarios on the burden of disease due to ischemic heart disease (IHD) and diabetes in the Turkish adult population. Methods: disease specific Hierarchical Bayes (HB) models estimate the individual disease probability as a function of behaviors, demographics, socio-economics and other controls, where constraints are specified based on the global RR estimates. The simulator combines the counterfactual disease probability estimates with disability adjusted life year (DALY)-per-prevalent-case estimates and rolls up to the targeted population level, thus reflecting the local joint distribution of exposures. The Global Burden of Disease (GBD) 2016 study meta-analysis results guide the analysis of the Turkish National Health Surveys (2008 to 2016) that contain more than 90 thousand observations. Findings: the proposed Qualitative Informative HB models do not sacrifice predictive accuracy versus benchmarks (logistic regression and HB models with non-informative and numerical informative priors) while agreeing with the global patterns. In the Turkish adult population, Increasing Physical Activity reduces the DALYs substantially for both IHD by 8.6% (6.4% 11.2%), and Diabetes by 8.1% (5.8% 10.6%), (90% uncertainty intervals). Eliminating Smoking and Second-hand Smoke predominantly decreases the IHD burden 13.1% (10.4% 15.8%) versus Diabetes 2.8% (1.1% 4.6%). Increasing Fruit and Vegetable Consumption, on the other hand, reduces IHD DALYs by 4.1% (2.8% 5.4%) while not improving the Diabetes burden 0.1% (0% 0.1%). Conclusion: while the national RR estimates are in qualitative agreement with the global patterns, the scenario impact estimates are markedly different than the attributable risk estimates from the GBD analysis and allow evaluation of practical scenarios with multiple behaviors.Publication Open Access Editorial: what is wrong with leader emergence?(Frontiers, 2022) Özbilgin, Mustafa F.; Chan, Kim Yin; Department of Psychology; Department of Business Administration; Aycan, Zeynep; Faculty Member; Department of Psychology; Department of Business Administration; College of Social Sciences and Humanities; College of Administrative Sciences and Economics; 5798NAPublication Open Access Behavioral functioning of school-aged children with non-syndromic craniosynostosis(Springer, 2020) Zeytinoğlu Saydam, Senem; Özek, M. Memet; Crerand, Canice; Department of Business Administration; Marcus, Justin; Faculty Member; Department of Business Administration; College of Administrative Sciences and Economics; 124653Purpose: this study investigated the risk for children with non-syndromic craniosynostosis to develop behavioral problems during school age determined by the type of craniosynostisis, age at first surgery, and number of surgeries. Method: final sample consisted of 43 children aged between 6 years and 8 months and 17 years and 1 month (M = 10 years and 5 months). Behavioral problems were assessed with Child Behavioral Checklist (CBCL). Results: our sample had higher scores on the CBCL than the general population; specific elevations were observed including somatic complaints, aggressive behavior, social problems, attention problems, and thought problems and rule-breaking behavior. Behavioral functioning varied by number of surgical procedures, type of craniosynostosis, and age at first surgery. Conclusion: for school-aged NSC children's behavioral functioning, diagnosis specific patterns especially impacted by the first age of the surgery and number of surgeries.Publication Open Access Family practice in Turkey: observations from a pilot implementation(Taylor _ Francis Open, 2016) Yaman, Hakan; Department of Business Administration; Güneş, Evrim Didem; Faculty Member; Department of Business Administration; College of Administrative Sciences and Economics; 51391Objective: Turkey has implemented family practice on a pilot basis as part of the reform in health care, since 2005. This paper aims to understand and describe the prevalent practice patterns and clinic characteristics during the transition period. Design: A cross-sectional descriptive study design was used. Subjects: An online survey was conducted among Turkish GPs working as primary care doctors (without vocational training) during the reform period. Clinic and GP characteristics are analysed with descriptive statistics. Results: List size is an important factor; larger lists lead to shorter consultation time and a longer wait for patients. GPs are generally satisfied with the reform. Conclusion: During the transition to family practice access of patients to health care has improved and GPs are satisfied with their job.Publication Open Access We survived this! what managers could learn from SMEs who successfully navigated the Greek economic crisis(Elsevier, 2020) Kottika, E.; Rydén, P.; Theodorakis, I.G.; Kaminakis, K.; Kottikas, K.G.; Stathakopoulos, V.; Department of Business Administration; Tunalı, Ayşegül Özsomer; Faculty Member; Department of Business Administration; College of Administrative Sciences and Economics; 108158Small and medium size enterprises in both business to business and consumer markets are particularly vulnerable to economic downturns. Concentrating on the Greek economic crisis, one of the toughest and most prolonged on a global scale, the present research sheds light on both anthropocentric and business-centric factors that helped SMEs survive, therefore, providing a valuable survival manual. Per findings of two studies performed under the given economically intense conditions, it is evidenced that the right answer to survival rests upon: (a) the entrepreneurs' personality traits and skills that affect the market and entrepreneurial orientations of SMEs, (b) the adoption of such orientations that keep impacting the firms' performance, and finally (c) the implementation of strategy relevant to reaching higher quality standards for products and services, combined with tactics relevant to downsizing, marketing actions, extroversion, and financial management.Publication Open Access A threat to loyalty: fear of missing out (FOMO) leads to reluctance to repeat current experiences(Public Library of Science, 2020) Hayran, Ceren; Anık, Lalin; Department of Business Administration; Canlı, Zeynep Gürhan; Faculty Member; Department of Business Administration; Graduate School of Business; 16135We investigate a popular but underresearched concept, the fear of missing out (FOMO), on desirable experiences of which an individual is aware, but in which they do not partake. Through laboratory and field studies, we establish FOMO's pervasiveness as a psychological phenomenon, present real-life contexts wherein FOMO may be experienced, and explore its behavioral consequences. Specifically, we show that FOMO poses a threat to loyalty by decreasing one's intentions to repeat a current experience and may decrease the valuation of the current experience.