Publications by authors named "Yucel Demiral"

Article Synopsis
  • The study investigates the timing of COVID-19 booster doses and antibody response in healthcare workers over a period from March to December 2021.
  • Antibody levels were significantly different across four measurements, showing a decline over time for both BNT162b2 and CoronaVac vaccines, especially impacted by the number of doses and the interval between vaccinations.
  • The findings suggest that longer intervals between booster doses potentially lead to higher and more sustained antibody levels, enhancing protection for healthcare workers.
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Aim: To evaluate anti-RBD IgG antibody levels and neutralizing antibody titers between the health care workers (HCWs) with breakthrough SARS-CoV-2 infection and controls.

Methods: In this nested case-case control study, we followed 548 vaccinated HCWs with homologous (only with inactivated vaccine) or heterologous (both with inactivated and BNT162b2 vaccine) vaccination for 11 months, prospectively. We obtained blood samples from the participants for quantitative anti-RBD IgG and surrogate neutralization test.

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Context: Beyond the biological impact of the pandemic in working life, socioeconomic consequences is also important for workers. This study aimed to investigate both biologic and economic impacts of the pandemic.

Methods: In this cross-sectional study, a structured questionnaire were applied by telephone to 233 workers who were diagnosed with coronavirus disease-2019 (Covid-19) at hospital.

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Objectives: The aim was to investigate the longitudinal relationship between precarious work and depressive symptoms in a representative cohort of employees in Germany.

Methods: In the German Study on Mental Health at Work (S-MGA) ( = 2009), depressive symptoms were assessed by the Patient Health Questionnaire (PHQ-9). Precarious work was measured through baseline (2012) self-reported job insecurity, marginal part-time, fixed-term contract, hourly wage and-during follow-ups 2012-2017-unemployment.

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Limited data are available on the short- to midterm levels of antibodies to the CoronaVac vaccine and quantitative change in humoral response after homologous or heterologous booster doses. In this prospective cohort study, we evaluated the anti-receptor-binding domain (RBD) immunoglobulin G (IgG) levels after two doses of CoronaVac and heterologous/homologous booster administration among healthcare workers in a university hospital in Turkey. Quantitative anti-RBD IgG antibody levels were measured at first and fourth months in 560 healthcare workers who had completed two doses of CoronaVac vaccine, and within 2 months after the third dose of CoronaVac or BNT162b2.

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Introduction In circulation, 99% vitamin D is transported by binding to vitamin D binding protein (VDBP) and albumin. Vitamin D at free form and vitamin D binding to albumin are defined as bioavailable vitamin D. Vitamin D deficiency is associated with atherogenic lipid profile and insulin resistance.

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Working at intensive care units (ICUs) is considered a risk factor for developing musculoskeletal complaints (MSC). This study was conducted between January 2017 and June 2019 in two ICUs of a university hospital. It was designed as a pre- and post-assessment of the intervention group (IG) (N = 27) compared with a control group (CG) (N = 23) to determine the effects of a multifaceted ergonomics intervention program in reducing MSC.

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Introduction: We aimed to evaluate the diagnosis of patients who applied on the first three years of our clinic, in order to contribute to the state of occupational diseases (OD) in Turkey.

Materials And Methods: The study is a cross-sectional study, between November 2013 and December 2016, 862 subjects were accepted for the evaluation. Gender, age, application ways, the reason of referral, workplace, exposure time and possible risks for the patients were evaluated through a file examination.

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Introduction: A new third version of the Copenhagen Psychosocial Questionnaire (COPSOQ III) has been developed in response to trends in working life, theoretical concepts, and international experience. A key component of the COPSOQ III is a defined set of mandatory core items to be included in national short, middle, and long versions of the questionnaire. The aim of the present article is to present and test the reliability of the new international middle version of the COPSOQ III.

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Background: Although various organizations working in developed countries established the standards and approaches used in occupational hygiene, occupational hygiene professional interests and needs continue to develop in a global context. There is thus an urgent need for expanded occupational hygiene models. For successful field implementation, these models should be based on several sets of criteria, including those related to international standards, various national requirements, and multidisciplinary approaches.

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The aim of the study was to adapt the Copenhagen Psychosocial Questionnaire Version-3 (COPSOQ-3) into the Turkish language.: This is a methodologic study. The field study occurred in four workplaces (call center, hospital, plastic and metal industries).

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Objective: Occupational diseases (OD) are among the most significant issues of work life, with economic, medical, social, and ethical aspects. The majority of studies concerning OD focus on the causes or medical outcomes of OD. There are a limited number of studies investigating the social and economic impacts of being diagnosed with an OD.

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Background: Dental laboratories include many hazards and risks. Dental technicians working in an unfavorable work environment in Turkey and other parts of the world may develop pneumoconiosis as a result of exposure to dust, depending on exposure time. In this study, we aimed to investigate the clinical and laboratory findings of dental technicians.

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The skydiving/parachuting sport which has recently gained popularity is also known for its accidents and injuries. However, there are a few studies related to its occupational ergonomic risks and occupational musculoskeletal diseases. It has been reported that the sudden hyperextension of the neck during the parachute opening, so called opening shock results in neck pain.

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Objective: The purpose of this study is to expand validity and reliability analysis of Turkish Version of Childhood Autism Rating Scale (CARS), whose internal consistency,content validity and discriminant validity for a limited size of sample group were examined by Sucuoğlu et al.

Method: 96 children and adolescents aged between 4-18, (48 diagnosed with pervasive developmental disorder (PDD) and 48 diagnosed with mental disability (MD) and developmental delay based on DSM-IV-TR criteria,) were included in the study. Regarding reliability analysis of Turkish Version of the scale; Cronbach's alpha values as internal consistency indicator, inter-rater reliability, and test-retest reliability were calculated.

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Background: According to the Turkey Burden of Disease Study, 10% of the national burden of disease is attributed to cardiovascular diseases. Although the standardized coronary heart disease (CHD) rate is falling in general, CHD prevalence among young people is rising. On the other hand, as a result of increased life expectancy and higher retirement ages, the CHD rate among workers is also increasing.

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Background/aim: We aimed to evaluate adverse drug reaction (ADR)-related emergency department (ED) visits in the ED of the Dokuz Eylül University Hospital prospectively.

Materials And Methods: Patients who were admitted to the ED during 1-week periods of four different seasons between July 2010 and April 2011 were enrolled. Demographics of patients, previous ADR history, clinical progress, and outcomes were recorded.

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Objective: To evaluate the participatory ergonomic method on the development of upper extremity musculoskeletal disorders and disability in office employees.

Methods: This study is a randomized controlled intervention study. It comprised 116 office workers using computers.

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Noise is defined as unwelcome sound. It has been estimated that 16% of adult hearing loss in the world is due to noise exposure at the workplace. This report offers a case that diagnosed with hearing loss of whom working as a call center operator at home.

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Background: Middle income countries are facing an epidemic of non-communicable diseases, especially coronary heart disease (CHD). We used a validated CHD mortality model (IMPACT) to explain recent trends in Tunisia, Syria, the occupied Palestinian territory (oPt) and Turkey.

Methods: Data on populations, mortality, patient numbers, treatments and risk factor trends from national and local surveys in each country were collated over two time points (1995-97; 2006-09); integrated and analysed using the IMPACT model.

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Objectives: Nasal continuous positive airway pressure (nCPAP) treatment is the gold standard treatment for obstructive sleep apnea syndrome (OSAS). In this study, we aimed to show that the pulmonary functions, exercise limitation on the cardiopulmonary exercise test (CPET), and the health-related quality of life can be improved after a short treatment period by nCPAP.

Materials And Methods: Our case group with severe obstructive sleep apnea (OSA) performed incremental CPET before and after 8 weeks of nCPAP treatment.

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Objectives: The aim of this study was to evaluate the short and long-term impact of pharmacovigilance (PV) training on the 5th year medical students' knowledge about definitions and on the awareness of the regulatory aspects in PV.

Materials And Methods: In academic year 2010/11, the students completed structured, questionnaire before and just after training. They also completed the same questionnaire 1-year after the training.

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Background: Coronary heart disease (CHD) mortality rates have been decreasing in Turkey since the early 1990s. Our study aimed to determine how much of the CHD mortality decrease in Turkey between 1995 and 2008 could be attributed to temporal trends in major risk factors and how much to advances in medical and surgical treatments.

Methods: The validated IMPACT CHD mortality model was used to combine and analyse data on uptake and effectiveness of CHD treatments and risk factor trends in Turkey in adults aged 35-84 years between 1995 and 2008.

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