Department of Statistics

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Publication (429)
Thesis (174)
Project (25)
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Yes (217)

Purutçuoğlu Gazi, Vilda (78)
Kalafat, Erkan (46)
Yozgatlıgil, Ceylan (46)
İlk Dağ, Özlem (33)
Gökalp Yavuz, Fulya (32)

Statistics and Probability (46)
Statistics, Probability and Uncertainty (29)
Statistics. (24)
General Medicine (19)
Obstetrics and Gynaecology (18)

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1980 - 1989 (20)
1990 - 1999 (45)
2000 - 2009 (107)
2010 - 2019 (347)
2020 - 2022 (107)

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Journal Article (226)
Master Thesis (143)
Conference Paper (94)
Ph.D. Thesis (31)
Project (23)

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...
Adaptif Yardımlı Dış İskelet Kontrol Sisteminin Motor Öğrenme Becerilerine Etkisi
Muslu, Enes; Sezer, Muhammed; Okasha, Amr; Şengezer, Sabahat; Yozgatlıgil, Ceylan; Turgut, Ali Emre; ARIKAN, KUTLUK BİLGE (2022-09-10)
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...
Data Science Education for Developing Countries: the Process of Democratization
Gökalp Yavuz, Fulya (2022-08-26)
Quality or quantity? Pitfalls of assessing the effect of endometrial thickness on live birth rates
Ata, Baris; Kalafat, Erkan (2022-08-01)
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 ...
An analysis to identify the structural breaks of Covid-19 in Turkey
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...
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...
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...
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...
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 ...
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) ...
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...
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
Denoising and Outlier Removal from Permanent Downhole Gauge Using Nonlinear Regression Methods
Özbayrak, Fehmi; Gökalp Yavuz, Fulya (2021-12-22)
Do live birth rate and obstetric outcomes vary between immediate and delayed embryo transfers following freeze-all cycles?
Yildiz, Sule; Turkgeldi, Engin; Kalafat, Erkan; Keles, Ipek; Gokyer, Dilan; Ata, Baris (2021-12-01)
Research question: Do live birth rates (LBR), obstetric and perinatal outcomes vary between women who underwent frozen embryo transfer (ET) in the immediately subsequent menstrual cycle, and with those who underwent delaye...
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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