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Öğe Association between parity and lumbar spine degenerative disorders in young women(Taylor & Francis Ltd, 2020) Cevik, Serdar; Yilmaz, Hakan; Kaplan, Atilla; Yetkinel, Selcuk; Evran, Sevket; Calis, Fatih; Akkaya, EnesIntroduction: Estrogen helps to maintain the health of collagen-containing tissues including the intervertebral disc. Estrogen deficiency after menopause negatively affects the quality of vertebral end plates and induces development of degenerative disc disease (DDD). However, there is no study examining the relationship between parity and spinal degeneration in young women. The aim of this study was to define the relationship between parity and development of vertebral endplate signal changes and DDD in young premenopausal women. Materials and methods: This case-control case study included 224 patients aged 20-40 years with a history of low back pain for at least 3 months. Pfirrmann's grade, Modic changes (MCs), and Schmorl's nodes (SNs) were graded based on magnetic resonance images. Patients' parity, demographics, body mass index, physical activity level, and disability scores were assessed using a questionnaire. Results: The prevalence of abnormal total Pfirrmann's score (>10) and MCs was higher in primiparous patients than multiparous and grand-multiparous; however, it was not statistically significant. The presence of SN was statistically significantly associated with low parity. According to multivariate logistic regression analysis, it was found that the number of births increases by 1 unit, the abnormality in Pfirrmann's score decreases by 1.36 times. Conclusions: This cross-sectional study shows that parity is associated with DDD and vertebral end plate changes. SNs were significantly associated with parity. Modic changes and DDD were less common in grand multipara and multipara young women than in primipara women. These results indicate that low parity may possibly be associated with the development of spinal degeneration.Öğe The Role of State-Owned Enterprises in an Artificial Monopoly Market: The Case of Turkey(Wiley, 2019) Cosar, Bora; Yilmaz, Hakan; Altindag, ErkutState-owned enterprises (SOEs) benefit from many privileges based on their unique structure, their substantial capital, and their position in the economic system. Like all business corporations, they have no fixed duration, which makes them effectively immortal. In addition, they are adjuncts of the state, which enables them to survive in noncompetitive markets with little effort. Therefore, under today's ruthless global market conditions, SOEs engage in unfair competition with privately financed businesses. By relying on their identity as state operations, they do not follow the rules of the market-they define those rules. In addition to SOEs, which are direct arms of the state, some privately financed businesses dominate markets in which the state allows them to develop an artificial monopoly and thus increase their power day by day. These artificial monopolies distort market processes and create conditions that frequently give rise to corruption. This study examines the problems associated with monopolies, with a special emphasis on establishing more efficient market structures for SOEs in Turkey. The original mission of SOEs was to balance markets through regulation and to be transparent and accountable to the public. Simply striving to meet those criteria would go a long way toward preventing the abuse of power and unfair competition. In addition, SOEs and artificial monopoly markets distort public institutions by promoting rent-seeking behavior that corrupts politics and blocks innovation from potential competitors. Privatization has been employed by international financial institutions in recent decades, but it has mostly transferred monopolies from the public sector to private owners, which has made the problem worse and done little to enhance competition. Establishing genuinely competitive economies will require a new political culture around the world.