10 results on '"Özen Alahdab Y"'
Search Results
2. Class Distance Weighted Cross-Entropy Loss for Ulcerative Colitis Severity Estimation
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Gorkem Polat, Ilkay Ergenc, Haluk Tarik Kani, Yesim Ozen Alahdab, Ozlen Atug, Alptekin Temizel, and Polat G., Ergenc I., KANİ H. T. , ÖZEN ALAHDAB Y., ATUĞ Ö., TEMİZEL A.
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Radiology, Nuclear Medicine and Imaging ,BİLGİSAYAR BİLİMİ, İNTERDİSİPLİNER UYGULAMALAR ,Mühendislik ,ENGINEERING ,Sağlık Bilimleri ,Clinical Medicine (MED) ,Bilgisayar Grafikleri ve Bilgisayar Destekli Tasarım ,Computer Science (miscellaneous) ,Radyoloji, Nükleer Tıp ve Görüntüleme ,Klinik Tıp (MED) ,RADYOLOJİ, NÜKLEER TIP ve MEDİKAL GÖRÜNTÜLEME ,MÜHENDİSLİK, BİYOMEDİKAL ,Bilgisayar Bilimi Uygulamaları ,Klinik Tıp ,Radiological and Ultrasound Technology ,Computer Sciences ,General Engineering ,Biyomedikal Mühendisliği ,COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS ,Bilgisayar Grafiği ,Computer Graphics and Computer-Aided Design ,Tıp ,Computer Science Applications ,Bilgisayar Bilimi (çeşitli) ,Physical Sciences ,Ordinal regression ,Medicine ,Engineering and Technology ,Bilgisayar Bilimi ,Medical imaging ,ENGINEERING, BIOMEDICAL ,Nükleer Tıp ,General Computer Science ,Biomedical Engineering ,Mühendislik (çeşitli) ,Bioengineering ,Yer Bilimlerinde Bilgisayarlar ,VALIDATION ,Mayo endoscopic score ,Genel Mühendislik ,Health Sciences ,Computer Graphics ,Bilgisayar Bilimleri ,Computers in Earth Sciences ,Engineering, Computing & Technology (ENG) ,Genel Bilgisayar Bilimi ,Engineering (miscellaneous) ,Internal Medicine Sciences ,Mühendislik, Bilişim ve Teknoloji (ENG) ,Deep learning ,Dahili Tıp Bilimleri ,COMPUTER SCIENCE ,CLINICAL MEDICINE ,Computer-aided diagnosis ,Biyomühendislik ,Fizik Bilimleri ,Ulcerative colitis ,Radyoloji ve Ultrason Teknolojisi ,Nuclear medicine ,Mühendislik ve Teknoloji ,RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING - Abstract
In scoring systems used to measure the endoscopic activity of ulcerative colitis, such as Mayo endoscopic score or Ulcerative Colitis Endoscopic Index Severity, levels increase with severity of the disease activity. Such relative ranking among the scores makes it an ordinal regression problem. On the other hand, most studies use categorical cross-entropy loss function to train deep learning models, which is not optimal for the ordinal regression problem. In this study, we propose a novel loss function, class distance weighted cross-entropy (CDW-CE), that respects the order of the classes and takes the distance of the classes into account in calculation of the cost. Experimental evaluations show that models trained with CDW-CE outperform the models trained with conventional categorical cross-entropy and other commonly used loss functions which are designed for the ordinal regression problems. In addition, the class activation maps of models trained with CDW-CE loss are more class-discriminative and they are found to be more reasonable by the domain experts.
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- 2022
3. Turkish Society of Gastroenterology: Pancreas Working Group, Acute Pancreatitis Committee Consensus Report.
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Öğütmen Koç D, Bengi G, Gül Ö, Özen Alahdab Y, Altıntaş E, Barutçu S, Bilgiç Y, Bostancı B, Cindoruk M, Çolakoğlu K, Duman D, Ekmen N, Eminler AT, Gökden Y, Günay S, Derviş Hakim G, Irak K, Kacar S, Kalkan İH, Kasap E, Köksal AŞ, Kuran S, Oruç N, Özdoğan O, Özşeker B, Parlak E, Saruç M, Şen İ, Şişman G, Tozlu M, Tunç N, Ünal NG, Ünal HÜ, Yaraş S, Yıldırım AE, Soytürk M, Oğuz D, and Sezgin O
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- Humans, Acute Disease, Consensus, Prognosis, Severity of Illness Index, Turkey, Gastroenterology standards, Pancreatitis therapy, Pancreatitis diagnosis, Societies, Medical
- Abstract
Acute pancreatitis (AP) is a clinical condition that arises acutely in the pancreas through various inflammatory pathways due to multiple causes. Turkish Society of Gastroenterology Pancreas Working Group developed comprehensive guidance statements regarding the management of AP that include its epidemiology, etiology, clinical presentation, diagnostic criteria, disease severity, treatment, prognosis, local and systemic complications. The statements were developed through literature review, deliberation, and consensus opinion. These statements were ultimately used to develop a conceptual framework for the multidisciplinary management of AP.
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- 2024
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4. RE: Risk of HBV Reactivation in HBsAg Negative and AntiHBc IgG Positive Patients Receiving Biologic Therapy.
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Ergenç İ, Kani HT, Karabacak M, Cömert Özer E, Mehdiyev S, Jafarov F, Abacar KY, Kutluğ Ağaçkıran S, Sevik G, Aslan R, Alibaz Öner F, İnanç N, Atagündüz MP, Seçkin D, Özen Alahdab Y, Ergun T, Direskeneli H, and Atuğ Ö
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- Humans, Hepatitis B Antibodies, Biological Therapy, Immunoglobulin G, Hepatitis B virus physiology, Hepatitis B Surface Antigens
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- 2023
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5. Biologic Therapy Carries a Very Low Risk of Reactivation in Hepatitis B Surface Antigen-Negative Phase of Hepatitis B.
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Ergenç İ, Kani HT, Karabacak M, Cömert Özer E, Mehdiyev S, Jafarov F, Abacar KY, Kutluğ Ağaçkıran S, Sevik G, Aslan R, Alibaz Öner F, İnanç N, Atagündüz MP, Seçkin D, Özen Alahdab Y, Ergun T, Direskeneli H, and Atuğ Ö
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- Adult, Aged, Female, Humans, Male, Middle Aged, Antigens, Surface, Antiviral Agents immunology, Antiviral Agents therapeutic use, Biological Therapy adverse effects, Biological Therapy methods, Hepatitis B Antibodies, Hepatitis B virus physiology, Retrospective Studies, Biological Products adverse effects, Biological Products therapeutic use, Hepatitis B drug therapy, Hepatitis B immunology, Hepatitis B prevention & control, Hepatitis B virology, Hepatitis B Surface Antigens immunology, Latent Infection etiology, Latent Infection immunology, Virus Activation drug effects, Virus Activation immunology
- Abstract
Background: The risk of hepatitis B reactivation in hepatitis B surface antigen-negative phase of hepatitis B virus-infected patients exposed to biologic agents is not clear. We aimed to investigate the reactivation rate in hepatitis B surface antigen-negative phase of hepatitis B virus-infected patients after biologic therapy., Methods: Patients followed at gastroenterology, rheumatology, and dermatology clinics with a diagnosis of immune-mediated inflam matory diseases were screened. Immune-mediated inflammatory diseases patients exposed to biologic agents with a negative hepatitis B surface antigen and positive hepatitis B core immunoglobulin G antibody were included in the study., Results: We screened 8266 immune-mediated inflammatory disease patients, and 2484 patients were identified as exposed to biologic agents. Two hundred twenty-one patients were included in the study. The mean age was 54.08 ± 11.69 years, and 115 (52.0%) patients were female. The median number of different biologic subtype use was 1 (range: 1-6). The mean biologic agent exposure time was 55 (range: 2-179) months. One hundred and fifty-two (68.8%) patients used a concomitant immunomodulatory agent, and 84 (38.0%) patients were exposed to corticosteroids during biologic use. No hepatitis B reactivation with a reverse seroconversion of hepatitis B surface antigen positivity was seen. Antiviral prophylaxis for hepatitis B was applied to 48 (21.7%) patients. Hepatitis B virus-DNA was screened in 56 (25.3%) patients prior to the biologic exposure. Two patients without antiviral prophylaxis had hepatitis B virus-DNA reactivation with a negative hepatitis B surface antigen during exposure to the biologic agent., Conclusion: We found 2 reactivations and no hepatitis B surface antigen seroconversion in our cohort. Antiviral prophylaxis for patients exposed to biologic agents may need to be discussed in more detail.
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- 2023
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6. The Investigation of Nutritional Status, Intestinal Permeability, and Quality of Life in People with Celiac Disease.
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Öztekin Y, Güneş FE, and Özen Alahdab Y
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- Humans, Nutritional Status, Quality of Life, Diet, Gluten-Free, Intestines, Celiac Disease
- Abstract
Background: Celiac disease is associated with impaired intestinal epithelial barrier integrity. Its consequences affect the nutritional status and quality of life of patients. This study aimed to determine nutritional status, intestinal permeability, and quality of life in people with celiac disease. It was researched whether patients who are non-compliant to gluten-free diet have higher serum zonulin levels and intestinal permeability., Methods: The study was completed with 44 celiac patients. Dietary records and a questionnaire were used to evaluate patients' compli ance to the gluten-free diet. Dietary records were analyzed by using a nutrition analysis program. Anthropometric measurements were taken. Body compositions were analyzed to assess the nutritional status of patients. Blood samples were collected and then zonulin levels and total serum proteins were measured to evaluate intestinal permeability. Celiac Disease Questionnaire was used to assess the quality of life scores., Results: Patients were divided into 2 groups considering compliance to the gluten-free diet and it was found that 17 patients were com pliant to the gluten-free diet, and 27 patients were non-compliant to the gluten-free diet. Serum zonulin, zonulin/total protein ratio, and intestinal permeability were higher in non-compliant to the gluten-free diet group (P < .05). There was no significant difference between anthropometric measurements, Celiac Disease Questionnaire scores, daily energy, and nutrient intakes of groups (P > .05)., Conclusion: The content of a gluten-free diet has a decisive role in the nutritional status and quality of life of celiac patients. Additionally, zonulin levels and intestinal permeability were higher in people with celiac disease who are non-compliant to gluten-free diet.
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- 2022
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7. Investigation of Eating Habits in Patients with Functional Dyspepsia.
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Çolak H, Güneş FE, Özen Alahdab Y, and Karakoyun B
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- Abdominal Pain complications, Butter, Feeding Behavior, Female, Humans, Olive Oil, Dyspepsia diagnosis
- Abstract
Background: Nutritional habits of patients with functional dyspepsia can affect the progression of functional dyspepsia. We aimed to determine the foods and dietary habits that may cause symptoms of postprandial fullness, early satiety, epigastric pain, and epigastric burning in functional dyspepsia patients., Methods: Sixty functional dyspepsia patients, who were diagnosed according to Rome IV criteria in the endoscopy unit of a gastroenterology institute, were included in the study. Data on the demographic characteristics, anthropometric measurements, nutritional habits, and food consumption frequency questionnaire of functional dyspepsia patients were collected., Results: Postprandial fullness was found more common in those who preferred roasting as a cooking method. There was no significant difference between symptoms and meal frequency. Epigastric burning and pain were found to be more pronounced in women, and alcohol consumption was less in patients who experienced more epigastric pain. In non-smoker participants, the complaint of early satiety was lower. It was found that broccoli, radish, celery, green olives, and olive oil consumption was less in participants who experienced excessive postprandial fullness. Patients with stomach pain consumed less dry fruits, green olives, butter, alcohol, and fast food. It was found that patients with stomach burning consumed less alcohol and fast food., Conclusion: In conclusion, functional dyspepsia patients should avoid or reduce consuming broccoli, radish, celery, green olives, olive oil, dry fruits, and butter which may trigger symptoms. Reducing consumption of these foods, abandoning unhealthy cooking methods such as roasting, reducing smoking, and reducing consumption of alcohol and fast food might be beneficial for relieving symptoms.
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- 2022
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8. Recommendations for Reopening Endoscopy Units in Turkey: A Set-up Plan from a Tertiary Center in Istanbul.
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Demirtas CÖ, Keklikkıran Ç, Mehdiyev S, Ergenç İ, Özen Alahdab Y, Gündüz F, Yılmaz Y, Atuğ Ö, and Özdoğan OC
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- Health Personnel standards, Humans, Infection Control methods, Personal Protective Equipment standards, Personal Protective Equipment supply & distribution, SARS-CoV-2, Turkey, COVID-19 prevention & control, Endoscopy standards, Infection Control standards, Tertiary Care Centers standards
- Abstract
In the midst of Coronavirus-19 (COVID-19) pandemic, endoscopic procedures have been separated for only urgent and semi-urgent cases for the last few months to prevent transmission in endoscopy units. This approach will perhaps resolve the burden of elective procedures in the months ahead of us. As we observe a downtrend in new cases of COVID-19 in Turkey, a strategy for reopening endoscopy units is required. We are stepping into a time period where we should not only re-provide the essential services to our patients but also maintain the safety of healthcare workers and preserve the valuable personal protective equipment as well. Herein, we aim to share the available knowledge in performing endoscopy during the pandemic and the set-up plan of a tertiary center in Istanbul for reopening the endoscopy unit in the era of the COVID-19 pandemic.
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- 2021
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9. Validation and reliability of the Turkish version of the inflammatory bowel disease questionnaire for ulcerative colitis and Crohn's disease.
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Kanı HT, Ergenç İ, Arıkan H, Kömesli Z, Seyrek B, Demirtaş CÖ, Özen Alahdab Y, İmeryüz N, and Atuğ Ö
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- Adult, Female, Humans, Male, Middle Aged, Reproducibility of Results, Translations, Turkey, Colitis, Ulcerative psychology, Crohn Disease psychology, Quality of Life, Severity of Illness Index, Surveys and Questionnaires standards
- Abstract
Background/aims: Inflammatory bowel diseases (IBD) impairs patients' quality of life (QoL). Inflammatory bowel disease questionnaire (IBDQ) is created to measure the health-related QoL specific for IBD. We planned to investigate the validation and reliability of the Turkish translation of IBDQ., Materials and Methods: Patients filled self-report questionnaires (Turkish Inflammatory bowel disease questionnaire (TrIBDQ) and Short Form-36 (SF-36)) themselves under a physician's supervision, and they were free to ask questions about the questionnaires. The participants then filled the same questionnaire after at least two weeks. Construct validity, discriminant ability, reliability, and susceptibility to change were analyzed separately for the IBD patients. Intra-class correlation coefficient (ICC) was used to assess test-retest reliability. Cronbach's alpha values were used to assess internal consistency., Results: A hundred patients enrolled in the study, 53 with Crohn's disease (CD), 47 with ulcerative colitis (UC). We found a moderate to high positive correlation between the TrIBDQ domains and the SF-36 dimensions. In UC and CD, TrIBDQ was able to differentiate active disease and remission. We found Cronbach's alpha for TrIBDQ domains ranged from 0.76-0.94 in CD and from 0.79-0.92 in UC. The total Cronbach's alpha for TrIBDQ was 0.96 in CD and 0.95 in UC. Sensitivity-to-change analyses of the bowel, systemic, and emotional scores showed statistically significant differences between their baseline and follow-up values., Conclusion: TrIBDQ is a valid and reliable tool for assessing the quality of life in Turkish speaking IBD patients. Thus it can be used in clinical research and practice.
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- 2020
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10. Evaluation of depression, anxiety and quality of life in hepatitis C patients who treated with direct acting antiviral agents.
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Kesen O, Kani HT, Yanartaş Ö, Aykut UE, Gök B, Gündüz F, Yılmaz Y, Özdoğan OC, and Özen Alahdab Y
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- Aged, Diagnostic Self Evaluation, Female, Hepatitis C, Chronic psychology, Humans, Male, Middle Aged, Antiviral Agents therapeutic use, Anxiety etiology, Depression etiology, Hepatitis C, Chronic complications, Hepatitis C, Chronic drug therapy, Quality of Life
- Abstract
Background/aims: Hepatitis C virus (HCV) infection is known to impair the quality of life (QoL). Increased levels of anxiety and depression have been found in HCV infection with a prevalence of 28% and 33%, respectively. Our aim was to investigate depression, anxiety, and QoL of chronic hepatitis C (CHC) patients before and after treatment with a direct-acting antiviral agent (DAAA)., Materials and Methods: In this study, enrolled CHC patients who had undergone DAAA treatment in our out-patient clinic. We administered the Hospital Anxiety and Depression (HAD) questionnaire to measure the severity of the anxiety and depression symptoms and the Short Form-36 (SF-36) questionnaire to measure the QoL at the beginning and at the end of the treatment., Results: Pretreatment anxiety and depression scores showed a statistically significant difference from the post treatment scores (p=0.000 and p=0.029 respectively). When we compared the SF-36 subitems before and after the treatment, a statistical significance was found in physical functioning (p=0.026), physical role limitation (p=0.009), bodily pain (p=0.011), general health (p=0.017), social functioning (p=0.006), and emotional role limitation (p=0.007). Also, an improvement was seen in the vitality (p=0.488) and mental health (p=0.714), which was not statistically significant., Conclusion: Depression got minimally worse in the male group despite an improvement in CHC. Anxiety scores were improved with treatment in the cirrhotic and non-cirrhotic groups significantly. A decrease in anticipatory anxiety may be related to the high treatment success with DAAA. Nearly all the subitems of the QoL scores were improved after treatment and these were more common in the female group. Elimination of HCV may itself decrease the number of patients who need psychiatric treatment.
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- 2019
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