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Recent Submissions

Systematic review and meta-analysis of the effectiveness and perinatal outcomes of COVID-19 vaccination in pregnancy
Prasad, Smriti; Kalafat, Erkan; Blakeway, Helena; Townsend, Rosemary; O’Brien, Pat; Morris, Edward; Draycott, Tim; Thangaratinam, Shakila; Le Doare, Kirsty; Ladhani, Shamez; von Dadelszen, Peter; Magee, Laura A.; Heath, Paul; Khalil, Asma (2022-12-01)
Safety and effectiveness of COVID-19 vaccines during pregnancy is a particular concern affecting vaccination uptake by this vulnerable group. Here we evaluated evidence from 23 studies including 117,552 COVID-19 vaccinated...
Extension of Leap Condition in Approximate Stochastic Simulation Algorithms of Biological Networks
Demirbüken, Saliha; Purutçuoğlu Gazi, Vilda (2022-11-01)
Robust estimation in multivariate heteroscedastic regression models with autoregressive covariance structures using EM algorithm
GÜNEY, YEŞİM; ARSLAN, OLÇAY; Gökalp Yavuz, Fulya (2022-09-01)
© 2022 Elsevier Inc.In the analysis of repeated or clustered measurements, it is crucial to determine the dynamics that affect the mean, variance, and correlations of the data, which will be possible using appropriate mode...
Quality or quantity? Pitfalls of assessing the effect of endometrial thickness on live birth rates
Ata, Baris; Kalafat, Erkan (2022-08-01)
Variable selection in linear-circular regression models
Çamlı, Onur; Kalaylıoğlu Akyıldız, Zeynep Işıl; SenGupta, Ashis (2022-08-01)
Applications of circular regression models are ubiquitous in many disciplines, particularly in meteorology, biology and geology. In circular regression models, variable selection problem continues to be a remarkable open q...
Maternal and perinatal outcomes of SARS-CoV-2 infection in unvaccinated pregnancies during Delta and Omicron waves
Birol Ilter, P.; Prasad, S.; Mutlu, M.A.; Tekin, A.B.; O'Brien, P.; von Dadelszen, P.; Magee, L.A.; Tekin, S.; Tug, N.; Kalafat, Erkan; Khalil, A. (2022-07-01)
© 2022 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.Objective: There is little evidence related to the ...
Estimation of disease progression for ischemic heart disease using latent Markov with covariates
Oflaz, Zarina; Yozgatlıgil, Ceylan; Kestel, Sevtap Ayşe (2022-06-01)
Contemporaneous monitoring of disease progression, in addition to early diagnosis, is important for the treatment of patients with chronic conditions. Chronic disease-related factors are not easily tractable, and the exist...
An analysis to identify the structural breaks of Covid-19 in Turkey
Oral Gonadotropin-Releasing Hormone Antagonists in the Treatment of Uterine Myomas: A Systematic Review and Network Meta-analysis of Efficacy Parameters and Adverse Effects
Telek, Savci Bekir; Gurbuz, Zeynep; Kalafat, Erkan; Ata, Baris (2022-05-01)
© 2022Objective: The aim of this systematic review is to gather and synthesize evidence regarding the use of oral gonadotrophin-releasing hormone (GnRH) antagonist for the treatment of bleeding associated with uterine myom...
Outcomes of a GnRH Agonist Trigger Following a GnRH Antagonist or Flexible Progestin-Primed Ovarian Stimulation Cycle
Kalafat, Erkan; Turkgeldi, Engin; Yildiz, Sule; Dizdar, Merve; Keles, Ipek; Ata, Baris (2022-05-01)
A suggested explanation for the pituitary-suppressive effects of progestin-primed ovarian stimulation cycles (PPOS) is pituitary luteinizing hormone (LH) depletion with progestin exposure during the follicular phase. The G...
Is robot-assisted laparoscopic myomectomy superior to laparoscopic myomectomy?
Abike, Faruk; Gemici, Ali; Gökalp Yavuz, Fulya; Sammour, Bashar; Tapisiz, Omer Lutfi; Dunder, Ilkkan (2022-05-01)
© 2022 S.O.G. CANADA Inc.. All rights reserved.Background: To determine whether RLM (Robot-assisted Laparoscopic Myomectomy) or LM (Laparoscopic Myomectomy) provides better surgical and post-operative outcomes for patients...
Clinical severity of SARS-CoV-2 infection among vaccinated and unvaccinated pregnancies during the Omicron wave
Birol Ilter, P.; Prasad, S.; Berkkan, M.; Mutlu, M. A.; Tekin, A. B.; Celik, E.; Ata, B.; Turgal, M.; Yildiz, S.; Turkgeldi, E.; O'Brien, P.; von Dadelszen, P.; Magee, L. A.; Kalafat, Erkan; Tug, N.; Khalil, A. (2022-03-01)
Antibody response of sheep to simultaneous vaccination of foot-and-mouth disease, peste des petits ruminants, sheep pox and goat pox, and bluetongue vaccines
Sareyyüpoǧlu, B.; Gülyaz, G.; Saraç, F.; Uzar, S.; Kabakl, Ö.; Çokçalşkan, C.; Gündüzalp, C.; Uzun, E.A.; Çamlı, Onur (2022-03-01)
There are many infectious animal diseases in Turkey and generally, vaccination is the primarly control strategy to combat them. However, it is difficult to apply all vaccines in a definite peri od i n the fi el d due to l ...
Adverse neonatal outcome in twin pregnancy complicated by small-for-gestational age: twin vs singleton reference charts
Briffa, C.; Di Fabrizio, C.; Kalafat, Erkan; Giorgione, V.; Bhate, R.; Huddy, C.; Richards, J.; Shetty, S.; Khalil, A. (2022-03-01)
Objective The use of twin-specific vs singleton growth charts in the assessment of twin pregnancy has been controversial. The aim of this study was to assess whether a diagnosis of small-for-gestational age (SGA) made usin...
The Comparison of Fixed and Flexible Progestin Primed Ovarian Stimulation on Mature Oocyte Yield in Women at Risk of Premature Ovarian Insufficiency
Kalafat, Erkan; Dizdar, Merve; Turkgeldi, Engin; Yildiz, Sule; Keles, Ipek; Ata, Baris (2022-02-01)
While gonadotrophin releasing hormone (GnRH) antagonists have been the standard of pituitary suppression during ovarian stimulation for ART, progestin primed ovarian stimulation (PPOS) has emerged as an alternative. Proges...
Should angiogenic markers be included in diagnostic criteria of superimposed pre-eclampsia in women with chronic hypertension?
Binder, J.; Kalafat, Erkan; Palmrich, P.; Pateisky, P.; Khalil, A. (2022-02-01)
Objective Although the most recent guidance from the International Society for the Study of Hypertension in Pregnancy (ISSHP) has highlighted the role of angiogenic marker assessment in the diagnosis of pre-eclampsia (PE) ...
A flexible Bayesian mixture approach for multi-modal circular data
Kilic, Muhammet Burak; Kalaylıoğlu Akyıldız, Zeynep Işıl; SenGupta, Ashis (2022-01-01)
In this article, we consider multi-modal circular data and nonparametric inference. We introduce a doubly flexible method based on Dirichlet process circular mixtures in which parameter assumptions are relaxed. We assess a...
Adaptive estimation of autoregression models under long-tailed symmetric distribution
Yentür, Begüm; Akkaya, Ayşen; Bayrak, Özlem Türker (2022-01-01)
© 2022 Taylor & Francis Group, LLC.Non-normal innovations in autoregression models frequently occur in practice. In this situation, least squares (LS) estimators are known to be inefficient and non-robust, and maximum like...
The Clustering Structure of the COVID-19 Outbreak in Global Scale
Personalized reference intervals – statistical approaches and considerations
Coskun, Abdurrahman; Sandberg, Sverre; Unsal, Ibrahim; Gökalp Yavuz, Fulya; Cavusoglu, Coskun; Serteser, Mustafa; Kılercık, Meltem; Aasne K , Aarsand (2021-12-01)
For many measurands, physicians depend on population-based reference intervals (popRI), when assessing laboratory test results. The availability of personalized reference intervals (prRI) may provide a means to improve the...
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