Articles in International Journals (Publons, ORCID, GoogleScholar)

  • Dag, O., Kasikci, M., Karabulut, E., Alpar, R. (2021). Diverse Classifiers Ensembe Based on GMDH Algorithm for Binary Classification. Communications in Statistics - Simulation and Computation. In press.
  • Demircioglu, A., Ozkal, O., Dag, O. (2021). Multiple Factors Affecting Health-Related Quality of Life in Women With Chronic Multisite Musculoskeletal Pain: A Cross-Sectional Study in Ankara, Turkey. Evaluation and the Health Professions. In Press.
  • Balaban, H.Y., Aslan, A.T., Ayar, S.N., Dag, O., Alp, A., Simsek, C., Vahabov, C., Yildirim, T., Goker, H., Buyukasik, Y., Simsek, H. (2021). Lack of Awareness of Hepatitis B Screening and Vaccination in High-Risk Groups. Turkish Journal of Medical Sciences. 51, 1229-1233.
  • Aslan, A.T., Pashayev, T., Dag, O., Akova, M. (2021). Comparison of Teicoplanin versus Vancomycin in Combination with Piperacillin-Tazobactam or Meropenem for the Risk of Acute Kidney Injury. European Journal of Clinical Microbiology and Infectious Diseases. 40, 1953–1961.
  • Balaban, H.Y., Dag, O., Alp, A., Tseveldorj, N., Vahabov, C., Goktas, M.A., Purnak, T., Hascelik, G., Demir, H., Sivri, B., Simsek, H. (2021). Retrospective Evaluation of Hepatitis C Awareness in Turkey Trough Two Decades. Turkish Journal of Gastroenterology. 32:1, 88-96.
  • Demircioglu, A., Dag, O., Ozkal, O. (2021). Validity and reliability of Turkish Version of the Recent Physical Activity Questionnaire. Cukurova Medical Journal, 46:2, 742-755.
  • Uzlasir, S., Ozdiraz, K.Y., Dag, O., Tunay, V.B. (2021). The Effects of Stroboscopic Balance Training on Cortical Activities in Athletes with Chronic Ankle Instability. Physical Therapy in Sport, 50, 50-58.
  • Gokcinar, D., Lafci, A., Dag, O., Ozkocak-Turan, I., Yamanel, H.L. (2021). Elevated Troponin I Trend is Associated with Poor Prognosis in Critical Covid-19 Patients. Acta Medica Mediterranea, 37:1, 409-413.
  • Ustun, G.G., Konas, E., El, H., Akarsu-Guven, B., Dag, O., Kamburoglu, H., Mavili, M.E. (2020). The Effects of Maxillary Movements on Nasal Aesthetics Following Orthognathic Surgery. The Journal of Craniofacial Surgery, 31:3, 796-800.
  • Dag, O., Karabulut, E., Alpar, R. (2019). GMDH2: Binary Classification via GMDH-Type Neural Network Algorithms - R Package and Web-Based Tool. International Journal of Computational Intelligence Systems, 12:2, 649-660.
  • Ustun, G.G., Ozturk, S., Gursoy, K., Ergun, E., Dag, O., Kocer, U. (2019). Major Structural Airway Pathologies of Patient Complaining Nasal Obstruction: Analysis of Frequency, Preoperative Complaints and Benefit from Surgery. The Journal of Craniofacial Surgery, 30:5, 1479-1483.
  • Sucu, M.G., Gokcinar, D., Lafci, A., Dag, O., Ozkocak-Turan, I., Gogus, N. (2019). The Prognostic Value of Lymphopenia in Adult Intensive Care Patients in Critical Condition. Acta Medica Mediterranea, 35:3, 1359-1365.
  • Lafci, A., Gokcinar, D., Dag, O., Gogus, N. (2019). Comparison of Effects of Sevoflurane and Desflurane on Perioperative Organ Functions and Cardiac Surgery Scores (CASUS) in Patients Undergoing Open Heart Surgery. Acta Medica Mediterranea, 35:2, 751-756.
  • Lafci, A., Gokcinar, D., Dag, O., Gunertem, E., Gunaydin, S. (2019). The Effect of "Patient Blood Management" Education on the Number of Red Blood Cell Transfusions in Patients Undergoing Cardiac Surgery: a 5-Year Retrospective Study. Turkish Journal of Clinics and Laboratory, 1, 98-103.
  • Dag, O., Dolgun, A., Konar, N.M. (2018). onewaytests: An R Package for One-Way Tests in Independent Groups Designs. The R Journal, 10:1, 175-199.
  • Lafci, A., Gokcinar, D., Budak, A.B., McCusker, K., Dag, O., Gunaydin, S. (2018). Comparison of Metabolic Effects of Del Nido Cardioplegia, Blood Cardioplegia, and St. Thomas Cardioplegia Solutions in Adult Patients Undergoing Isolated Minimally Invasive Aortic Valve Replacement Surgery. Turkish Journal of Clinics and Laboratory, 4, 260-265.
  • Lafci, A., Gokcinar, D., Dag, O. (2018). Identifying Surgery and Anesthesia - Related Anxiety in Patients Undergoing Colorectal Cancer Surgery. International Journal of Anesthesiology and Research, 6:9, 550-554.
  • Dag, O., Ilk, O. (2017). An Algorithm for Estimating Box-Cox Transformation Parameter in ANOVA. Communications in Statistics - Simulation and Computation, 46:8, 6424-6435.
  • Lafci, A., Gokcinar, D., Ornek, D., Yilmaz, S., Dikmen, B., Un, C., Kilci, O., Dag, O. (2017). Addition of Fentanyl to Levobupivacaine Decreases Postoperative Pain During Arthroscopic Shoulder Surgery Under Interscalene Brachial Plexus Block. Acta Medica Mediterranea, 33:5, 827-831.
  • Asar, O., Ilk, O., Dag, O. (2017). Estimating Box-Cox Power Transformation Parameter Via Goodness-of-Fit Tests. Communications in Statistics - Simulation and Computation, 46:1, 91-105.
  • Dag, O., Yozgatligil, C. (2016). GMDH: An R Package for Short Term Forecasting Via GMDH-Type Neural Network Algorithms. The R Journal, 8:1, 379-386.
  • Babaoglu, E., Kilic, H., Hezer, H., Dag, O., Parlak, E., Senturk, A., Karalezli, A., Alisik, M., Erel, O., Hasanoglu, H.C. (2016). Comparison Of Thiol/Disulphide Homeostasis Parameters in Patients with COPD, Asthma and ACOS. European Review for Medical and Pharmacological Sciences, 20:8, 1537-1543.
  • Dag, O., Asar, O., Ilk, O. (2014). A Methodology to Implement Box-Cox Transformation When No Covariate is Available. Communications in Statistics - Simulation and Computation, 43:7, 1740-1759.
  • Papers in International Conferences

  • Ghahramani, M., Dag, O., de Leon, A.R. (2014). Semi-Parametric Estimation of Count Time Series. International Work-Conference on Time Series Analysis, pp. 81-86, June 25-27, Granada, Spain.
  • Abstracts in International Conferences

  • Dag, O., Dolgun, A. (2019). A Novel Test of Normality Based on Concordance Correlation Coefficient. 4th International Biostatistics Congress, October 26-29, Antalya, Turkey.
  • Dag, O., Karabulut, E., Alpar, R. (2018). GMDH-Type Neural Network Algorithms for Binary Classification: GMDH2 R Package and Its Web Interface. 3rd International Biostatistics Congress, 26-29 October, Gaziantep, Turkey.
  • Dag, O., Karabulut, E., Alpar, R. (2018). Diverse Classifiers Ensembe Based on GMDH Algorithm for Binary Classification in R. 29th International Biometric Conference, pp. 72, 8-13 July, Barcelona, Spain.
  • Dag, O., Ilk, O. (2017). Asymmetric Confidence Interval with Box-Cox Transformation in R. 10th International Statistics Congress, pp. 215, December 6-8, Ankara, Turkey [Poster].
  • Dag, O., Ilk, O. (2017). Box-Cox Transformation for Linear Models via Goodness-of-Fit Tests in R. 10th International Statistics Congress, pp. 219, December 6-8, Ankara, Turkey [Poster].
  • Dag, O., Dolgun, A., Konar, N.M. (2017). One-Way Tests in Independent Groups Designs: the onewaytests Web Interface. 2nd International Biostatistics Congress, October 25-28, Antalya, Turkey.
  • Dag, O., Yozgatligil, C. (2016). GMDH: An R Package for Short Term Forecasting Via GMDH-Type Neural Network Algorithms. 1st International Biostatistics Congress, pp. 59-60, October 26-29, Antalya, Turkey.
  • Konar, N.M., Dag, O., Basol, M. (2015). Comparison of Multiple Linear Regression and Ridge Regression on a Real Life Data Application. 9th International Statistics Congress, pp. 267-268, October 28 - November 1, Antalya, Turkey [Poster].
  • Basol, M., Dag, O., Konar, N.M. (2015). Estimation of Ridge Constant in Ridge Regression via K-Fold Cross Validation. 9th International Statistics Congress, pp. 271-272, October 28 - November 1, Antalya, Turkey [Poster].
  • Konar, N.M., Dag, O., Dolgun, A. (2015). Effects of Non-normality and Heterogeneity on Tests for One-Way Independent Groups Design: Type I Error and Power Comparisons. XVth Spanish Biometric Conference, pp. 113, September 22-25, Bilbao, Spain.
  • Konar, N.M., Dag, O. (2015). Determining the Number of Clusters with an Application in R. European Meeting of Statisticians, pp. 102, July 6-10, Amsterdam, Netherlands.
  • Dag, O., Ilk, O. (2015). MLE in A Feasible Region is As Good As or Better Than the Usual MLE While Estimating Box-Cox Transformation Parameter in ANOVA. The 8th Conference of Eastern Mediterranean Region of International Biometric Society, pp. 15, May 11-15, Cappadocia, Nevsehir, Turkey.
  • Dag, O., Yozgatligil, C. (2015). Forecasting Via GMDH Algorithm with Medical Applications in R. The 8th Conference of Eastern Mediterranean Region of International Biometric Society, pp. 54, May 11-15, Cappadocia, Nevsehir, Turkey.
  • Dag, O., Asar, O., Ilk, O. (2013). Estimating Box-Cox Power Transformation Parameter Via Goodness-of-Fit Tests. y-BIS 2013: Joint Meeting of Young Business and Industrial Statisticians, pp. 66, September 19-21, Istanbul, Turkey.
  • Dag, O., Asar, O., Ilk, O. (2012). A Methodology to Implement Box-Cox Transformation When No Covariate is Available. 8th World Congress in Probability and Statistics, pp. 188, July 9-14, Istanbul, Turkey.
  • Abstracts in National Conferences

  • Konar, N.M., Dag, O., Dolgun, A. (2015). onewaytests: Tek Yonlu Bagimsiz Grup Tasarimi icin Bir R Paketi. 17th National Biostatistics Congress, pp. 39-40, November 5-9, Girne, Cyprus.