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    Analyzing Covid-19 Pandemic Through Cases and Spillover Effect: Cross Wavelet Transformation of Mobility in the Countries
    (Springer, 2024) Dogan, Ibrahim; Dogan, Aydan; Gurbuz, Suleyman; Cirakli, Umit
    This research examines the relationship between daily Covid-19 cases and public mobility for six different places, where mobility can be high, in Brazil, the UK, and the USA. We tried to show how the spreading effect of infectious diseases occurs in places where human mobility is intense. The data consists of daily data covering the periods from 28/02/2020 to 08/02/2021, which includes the database of Our World in Data and Google Mobility Reports. Basically, there is a positive correlation between mobility and case numbers. Results in the paper differ from country to country. That is to say, mobility in grocery stores and pharmacies can be said to have an impact on the number of cases in all three countries. Brazil is the country where mobility in parks has the strongest impact. The country which has the lowest frequency in retail outlets is America.
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    Determinants of Conversion From Laparoscopic to Open Cholecystectomy: Türkiye Case
    (Galenos Publ House, 2024) Aslan, Huseyin; Cirakli, Umit; Ozden, Sabri; Cetin, Emine
    Objective: The aim of this study was to determine the characteristics of patients who required conversion from laparoscopic to open cholecystectomy. In addition, we compared the health outcomes of laparoscopic and converted cholecystectomy. Methods: This was a retrospective, cross-sectional study. The laparoscopic cholecystectomy procedures performed in hospitals of the Turkish Ministry of Health in 2016 were examined. Chi-square and Mann-Whitney U tests were used to analyze the data. Results: There were 103,387 laparoscopic cholecystectomy. Of these, 102,294 (98.9%) were laparoscopically completed, whereas 1,093 (1.1%) were converted to open cholecystectomy. The majority (75.9%) of the patients were female. The rate of conversion from laparoscopic to open cholecystectomy; in men >= 65 years of age, patients with chronic renal failure, hypertension, diabetes, malign neoplasm, and cerebrovascular disease were found to be statistically significantly higher than those in the opposing groups. Mortality, complications, intensive care unit treatment rates, and average hospitalization time were found to be statistically significant in cholecystectomy converted to open surgery. Conclusion: Patients who had converted cholecystectomy had more negative health outcomes than those who had completed the procedure laparoscopically. Old age, being male, and having comorbidities and malignancies increase the risk of conversion to open cholecystectomy. These factors can help determine the conversion risk of laparoscopic cholecystectomy to an open procedure.
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    Impact of COVID-19 on emergency service usage in Turkey: interrupted time series analysis
    (Springer-Verlag Italia Srl, 2023) Cirakli, Umit; Orhan, Mustafa; Sayar, Burak; Demiray, Emine Kubra Dindar
    The aim of this study is to reveal the impact of the COVID-19 pandemic, which constitutes an extraordinary situation, on the habits of emergency health service use. The data of the study consist of emergency service applications of a public hospital in Turkey between the years 2018-2021. The number of applications to the emergency service was examined periodically. The interrupted time series analysis method was used to reveal the impact of the COVID-19 outbreak on emergency service admissions. When the main findings are analyzed in quarterly periods (3 months = 1 quarter); there has been a sharp decrease in emergency service applications since March 2019, when the first case was seen in Turkey. When an evaluation is made between consecutive quarters, it is seen that there are fluctuations up to 80% in the number of applications. When the statistical analysis findings are examined; while the effect of COVID-19 on the number of applications was found to be significant for the first four periods, it was found to be insignificant for the following periods. With the conducted study, it was revealed that COVID-19 has a significant impact on the use of emergency health services. Although there was a statistically significant decrease in the number of applications, especially in the months following the first case, there was an increase in the number of applications over time. Considering the necessity of using emergency health services when necessary, it can be thought that some of the decrease in the number of applications during the COVID-19 period will be related to the use of unnecessary emergency health services.
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    The effect of air pollution quality on lung cancer rates in middle-income and high-income countries: a panel data analysis approach
    (Frontiers Media Sa, 2024) Gozlu, Mehmet; Senol, Osman; Cirakli, Umit; Aslan, Huseyin; Akbulut, Fevzi; Gokkaya, Durmus
    Background Air pollution is one of the biggest problems in societies today. The intensity of indoor and outdoor air pollutants and the urbanization rate can cause or trigger many different diseases, especially lung cancer. In this context, this study's aim is to reveal the effects of the indoor and outdoor air pollutants, and urbanization rate on the lung cancer cases.Methods Panel data analysis method is applied in this study. The research includes the period between 1990 and 2019 as a time series and the data type of the variables is annual. The dependent variable in the research model is lung cancer cases per 100,000 people. The independent variables are the level of outdoor air pollution, air pollution level indoor environment and urbanization rate of countries.Results In the modeling developed for the developed country group, it is seen that the variable with the highest level of effect on lung cancer is the outdoor air pollution level.Conclusions In parallel with the development of countries, it has been determined that the increase in industrial production wastes, in other words, worsening the air quality, may potentially cause an increase in lung cancer cases. Indoor air quality is also essential for human health; negative changes in this variable may negatively impact individuals' health, especially lung cancer.