Dag, O., Kasikci, M., Yilmaz, M.A., Weerahandi, S., Ananda, M.M.A. (2024). twowaytests: An R Package for Two-Way Tests in Independent Groups Designs. SoftwareX, 27, 1-8.
Uzlasir, S., Harput, G., Dag, O., Tunay, V.B. (2024). The Effects of Stroboscopic Training in Athletes With Chronic Ankle Instability. International Journal of Athletic Therapy and Training, 29:1, 33-37.
Ayar, S.N., Soyak-Aytekin, E., Simsek, C., Dag, O., Cagdas, D., Balaban, Y.H. (2024). Inborn Errors of Immunity in Adults with Autoimmune Liver Diseases. Turkish Journal of Gastroenterology, 35:7, 560-567.
Gunes-Bora, N., Alkan, I., Akin-Isik, R., Dag, O., Ozcebe, H. (2024). Childhood Obesity: Pathways Between Mothers’ Health Literacy and Behaviors and Self Efficacy of Eating and Physical Activity in Their Children. Journal of Education and Research in Nursing, 21:1, 11-19.
Demircioglu-Karagoz, A., Atasavun, U., Dag, O., Senses-Dinc, G., Cak-Esen, H.T. (2023). Dikkat Eksikliği Hiperaktivite Bozukluğu Olan Çocuklarda Kombine Egzersiz Eğitiminin Fiziksel Uygunluk, Akademik Başarı ve Sosyal İlişkiler Üzerine Etkisinin İncelenmesi. Journal of Exercise Therapy and Rehabilitation, 10:3, 194-210.
Gokgoz-Ozisik, G., Cakmak, H., Kendirci, M., Dag, O. (2023). Comparison of Dry Eye Findings in Diabetes Mellitus Patients with and without Diabetic Foot. Sakarya Medical Journal, 13:4, 499-506.
Ananda, M.M.A., Dag, O., Weerahandi, S. (2023). Heteroscedastic Two-Way ANOVA under Constraints. Communications in Statistics - Theory and Methods, 52:22, 8207-8222.
Weerahandi, S., Ananda, M.M.A., Dag, O. (2023). Two Approaches to extend Classical MANOVA Tests to the Unequal Covariances Case. Hacettepe Journal of Mathematics and Statistics, 52:4, 1066-1081.
Dag, O., Kasikci, M., Ilk, O., Yesiltepe, M. (2023). GeneSelectML: A Comprehensive Way of Gene Selection for RNA-Seq Data via Machine Learning Algorithms. Medical & Biological Engineering & Computing, 61:1, 229-241.
Buyuksahin, H.N., Dogru, D., Gozmen, O., Ozon, A., Portakal, O., Emiralioglu, N., Haliloglu, M., Kilic, K., Vardar-Yagli, N., Yildirim, D., Dag, O., Guzelkas, I., Yalcin, E., Ozcelik, U., Kiper, N. (2023). Cystic Fibrosis Related Bone Disease in Children: Can It be Predicted?. Clinical Nutrition, 42, 1631-1636.
Kurt, B., Sipahi-Karsli, Z., Cakmak-Oksuzoglu, B.O., Ozturk, E., Demirors, N., Dag, O. (2023). Determination of the Influence of Peripheral Neuropathy Symptoms on Quality of Life in Breast Cancer Patients: A Cross-Sectional Study with Four Follow-Ups. Florence Nightingale Journal of Nursing, 31:2, 75-81.
Aslan, A.T, Tabah, A., Köylü, B., Kaya-Kalem, A., Aksoy, F., Erol, C., Karaali, R., Tunay, B, Guzeldag, S., Batirel, A., Dindar, E.K., Akdogan, O., Bilir, Y., Ersoz, G., Ozturk, B., Selcuk, M., Yilmaz, M., Akyol, A., Akbas, T., Sungurtekin, H., Timuroglu, A., Gurbuz, Y., Colak, O., Bayindir, Y., Eroglu, A., Ferlicolak, L., Cesme, U. Dag, O., Buetti, N., Barbier, F., Ruckly, S., Staiquly, Q., Timsit, J.F., Akova, M. (2023). Epidemiology and risk factors of 28-day mortality of hospital-acquired bloodstream infection in Turkish intensive care units: a prospective observational cohort study. Journal of Antimicrobial Chemotherapy. 78:7,1757–1768.
Keles, S., Dag, O., Aksu, M., Gulpinar, G., Yalim, N.Y. (2023). Development of the Inclination Toward Conscientious Objection Scale for Physicians. Health Care Analysis, 31, 81-98.
Tasar, G.E., Uzerk-Kibar, M., Dag, O., Erdem, Y., Ertoy-Baydar, D., Saglam, A. (2023). Cytoplasmic WT1 in IgA Nephropathy, An Indicator of Poor Prognosis Associated with Mesangial/Peri-mesangial C4d. International Urology and Nephrology, 55, 661-669.
Demircioglu, A., Ozkal, O., Dag, O. (2023). Health-Related Quality of Life Revealed Through Patient-Reported Outcomes. Bariatric Surgical Practice and Patient Care, 18:1, 49-55.
Gunes, B., Alkan, I., Bora-Gunes, N., Keskin, M.T., Dag, O. (2023).Relationship Between Physical Activity Levels of the Secondary School Students and Their Safe Environment, Playing Conditions and Media Usage. Hacettepe University Journal of Education, 38:1, 27-38.
Demircioglu, A., Atasavun-Uysal, S., Sanlı-Dumankaya, B.B., Kirdi, E., Cak-Esen, H.T., Dag, O., Topuz, S. (2023). Do Children with Attention Deficit and Hyperactivity Disorder Present with Different Spatio-Temporal Gait Parameters? An Evaluation of the Relationship Between Gait and Gross Motor Skills. Alpha Psychiatry, 24:1, 1-7.
Uzlasir, S., Ozdiraz, K.Y., Dag, O., Tunay, V.B. (2022). The Effect of Stroboscopic Training on Ankle Mechanics During Gait in Chronic Ankle Instability: Clinical Trials. Turkiye Klinikleri Journal of Health Sciences, 7:4, 1096-1104.
Yilmaz M.A., Dag, O. (2022). Ensemble Based Box-Cox Transformation via Meta Analysis. Journal of Advanced Research in Natural and Applied Sciences, 8:3, 463-471.
Dag, O., Kasikci, M., Karabulut, E., Alpar, R. (2022). Diverse Classifiers Ensemble Based on GMDH Algorithm for Binary Classification. Communications in Statistics - Simulation and Computation, 51:5, 2440-2456.
Demircioglu, A., Ozkal, O., Dag, O. (2022). 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, 45:2, 115-125.
Balaban, H.Y., Aslan, A.T., Akdogan-Kittana, F.N., Alp, A., Dag, O., Ayar, S.N., Vahabov, C., Simsek, C., Yildirim, T., Goker, H., Ergunay, K., Erdem, Y., Buyukasik, Y., Simsek, H. (2022). Hepatitis E Virus Prevalence and Associated Risk Factors in High-Risk Groups: A Cross-Sectional Study. Turkish Journal of Gastroenterology. 33:7, 615-624.
Aslan, A.T., Kirbas, E., Sancak, B., Tanriverdi, E.S., Otlu, B., Gursoy, N.C., Yilmaz, Y.A., Tozluyurt, A., Liste, U., Bicakcigil, A., Hazırolan, G., Dag, O., Guven, G.S., Akova, M. (2022). A Retrospective Observational Cohort Study of the Clinical Epidemiology of Bloodstream Infections due to Carbapenem-Resistant Klebsiella Pneumoniae in an Oxa-48 Endemic Setting. International Journal of Antimicrobial Agents, 59:4, 1-8.
Shayan, N.A., Niazi, A., Moheb, H., Mohammadi, H., Saddiqi, K.W., Dag, O., Ozcebe, H. (2022). Epidemiology of Drug Use in Herat - Afghanistan. Addiction and Health, 15:1, 68-77.
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 Through 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.