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Senior Lecturer
Life member, Institute of Applied Statistics Sri Lanka (IASSL)
Research Excellence Award, Faculty of Science, University of Peradeniya, 2017 to 2025.
Elected Member of the International Statistical Institute (ISI)Journal of Food Composition and Analysis
5. Dassanayake, S. P., & Nawarathna, L. S. (2025). A machine learning-based approach for predicting the level of palm oil adulteration in coconut oil. Journal of Food Composition and Analysis, 137: 106969.
DOI: https://doi.org/10.1016/j.jfca.2024.106969
Communications in Statistics - Simulation and Computation
Duwarahan, J., and Nawarathna, L. S.
(2024). Analyzing method comparison data with skew-normal measurement error models: incorporating generalized scale mixtures and varying degrees of freedom.
. Communications in Statistics - Simulation and Computation, : 1-29.
DOI: https://doi.org/10.1080/03610918.2024.2366984
BMC Med Education
Jayawardena, C.K., Groenier, M. and Nawarathna, L.S.
(2024). Relationship of adaptive expertise of health professions educators with age, experience, academic rank, and their work performance
during an altered academic environment.
. BMC Med Education, 24: 862.
DOI: https://doi.org/10.1186/s12909-024-05838-9
Journal of Science of the University of Kelaniya
Ekanayake, W. E. M. D. T., & Nawarathna, L. S. (2024). A model for predicting confirmed leptospirosis cases in Sri Lanka. Journal of Science of the University of Kelaniya, 17(2): 73-91.
DOI: https://doi.org/10.4038/josuk.v17i2.8109
Ceylon Journal of Science
Weerasinghe, N. M. A. N., Nawarathna, L. S., & Pitawala, H. M. T. G. A. (2024). Assessing groundwater quality in the northwestern coastal area of Sri Lanka using multivariate statistical techniques. Ceylon Journal of Science, 53(4): 559-568.
DOI: https://doi.org/10.4038/cjs.v53i4.8210
E-Learning and Digital Media
Jayawardena, C. K., Dissanayake Mudiyanselage, R. T., Marambe, K., & Nawarathna, L. S. (2024). Exploring the impact of e-learning instructional designs on students’ learning approaches and knowledge gain. E-Learning and Digital Media, .
DOI: https://doi.org/10.1177/20427530241297367
Sri Lanka Dental Journal
Gunasinghe, M.Y.M.Y., Nawarathna, L.S., Pathirathna, M.L., Ariyasinghe, K. S. N. and Paranagama, M.P.
(2023). Dental caries related nutritional knowledge of mothers with children less than 6 years of age in Devinuwara MOH area of Matara District
. Sri Lanka Dental Journal, 53(1): 20-28.
Asian Exercise and Sport Science
Nilaweera, A.I., Ekanayake, E.M.T.R., Nawarathna, L.S. and Dissanayake, J.K.
(2023). Motivation for Dual Career Engagement among University Athletes in Sri Lanka
. Asian Exercise and Sport Science, 7(1): 2588-4832.
DOI: https://doi.org/10.30472/aesj.v7i1.349
International Journal of Forensic Odontology
Kariyawasam, K., Madushika, K., Meegoda, N., Arambawatta, K., Abeysundara, A., Alahakoon, S. and Nawarathna, L.
(2023). Sexual dimorphism in permanent mandibular and maxillary canines of Sri Lankan Sinhalese population
. International Journal of Forensic Odontology, 8(1): 7-23.
DOI: https://doi.org/10.56501/intjforensicodontol.v8i1.668
Biom Biostat Int J.
Selvamalai, T., Nawarathna, L.S. and Nanayakkara, D.
(2023). Identification of sex from humerus of skeletons using discriminant analysis: a study on contemporary Sri Lankan population
. Biom Biostat Int J., 12(3): 88-93.
DOI: https://doi.org/10.15406/bbij.2023.12.00389
Medico-Legal Journal of Sri Lanka
Sanjaya, B., Vadysinghe, A. N., Sivasubramanium, M., Ekanayake, E. M. K. B., Rodrigo, G., Nawarathna, L. S. and Liyanage, L. P. M.
(2023). Sex Determination by Evaluation of Foramen Magnum on Computer Tomography Scanning Among Sri Lankan Population
. Medico-Legal Journal of Sri Lanka, 11(1): 20-26.
DOI: https://doi.org/10.4038/mljsl.v11i1.7476
Biom Biostat Int J
Rathnayake, H.M.A.D., Nawarathna, L.S. and Chandrajith, R.
(2023). Multivariate statistical techniques for the evaluation of hydrogeochemical data from areas with chronic kidney disease of unknown
etiology (CKDu) in Sri Lanka
. Biom Biostat Int J, 12(6): 196-202.
DOI: http://doi.org/10.15406/bbij.2023.12.00403
Journal of Advances in Mathematics and Computer Science
De Silva, H. H., Nawarathna, L. S. and Vithanaarachchi, V. S. N.
(2022). Machine Learning Regression Tree Approach for Age Prediction from Eruption Status of Permanent Teeth in Sri Lankan
Children
. Journal of Advances in Mathematics and Computer Science, 37(1): 1-7.
DOI: https://doi.org/10.9734/jamcs/2022/v37i130425
Ceylon Journal of Science
Lakmali, S. M. M., Nawarathna, L. S. and Wijekoon, P.
(2022). Bayesian linear regression model for method comparison studies
. Ceylon Journal of Science, 51(1): 37–42.
DOI: http://doi.org/10.4038/cjs.v51i1.7977
Journal of Probability and Statistics
Duwarahan J. and Nawarathna, L. S.
(2022). An Improved Measurement Error Model for Analyzing Unreplicated Method Comparison Data under Asymmetric Heavy-Tailed Distributions
. Journal of Probability and Statistics, 2022, Article ID 3453912: 1-13.
DOI: https://doi.org/10.1155/2022/3453912
Journal of Applied Mathematics, Statistics and Informatics
Lakmali, S. M. M., Nawarathna, L. S. and Wijekoon P.
(2022). A heteroscedastic Bayesian model for method comparison data
. Journal of Applied Mathematics, Statistics and Informatics, 18(2): 57-75.
DOI: http://dx.doi.org/10.2478/jamsi-2022-0012
Sri Lankan Journal of Health Sciences
Uyangoda, N.T.P., Gamagedara, T.P., Suraweera, R.K. and Nawarathna, L.S.
(2022). Investigation of the Use of Medicinal Plants and Natural Products for COVID-19 Prevention and Respiratory Symptoms Treatment during the COVID-19 Pandemic in Sri Lanka
. Sri Lankan Journal of Health Sciences, 1(2): 16–26.
DOI: http://doi.org/10.4038/sljhs.v1i2.48
Sri Lanka Anatomy Journal
Kosgallana, E. W., Eshwara, J. M., Nawarathna, L. S. and Dissanayake, J.
(2022). Morphometric Analysis of Peroneus Tertius and Extensor Digitorum Longus
. Sri Lanka Anatomy Journal, 6(2): 39-47.
DOI: https://doi.org/10.4038/slaj.v6i2.145
International Journal of Morphology
Nanayakkara, D., Nawarathna, L. S.,
Nandasena, T., Alahakoon, S., Ariyasinghe, S., & Arambawatta, K. (2021). Hand and Handprint Measurements in the
Estimation of Stature in a Sri Lankan Population. International Journal of Morphology, 39 (1): 222-230.
DOI: http://dx.doi.org/10.4067/S0717-95022021000100222.
Dental Traumatology
Wimalarathna,
A. A. A. K., Herath, E. M. U. C. K., Senarath, N. H., Fonseka, M. C. N.,
Manathunga, M. M. K. M., Nawarathna, L. S., & Andersson, L. (2021). Introduction
of an interactive tool (the Dental Trauma Guide) in the undergraduate dental
teaching to manage traumatic dental injuries. Dental Traumatology, 37 (5): 717-724.
https://pubmed.ncbi.nlm.nih.gov/34120401/
Computer Methods and Programs in Biomedicine Update
Dayarathne,
S., Nawarathna, L. S., & Nanayakkara, D. (2021). Determination
gender using foot, footprint, hand and hand print measurements in a Sinhalese
population in Sri Lanka using supervised learning techniques. . Computer Methods and Programs in Biomedicine Update, 1: 100017.
https://www.sciencedirect.com/science/article/pii/S2666990021000161
Ceylon Medical Journal
Vithanaarachchi,
N., Nawarathna, L., & Wijeyeweera, L (2021). Standards
for permanent tooth emergence in Sri Lankan children. . Ceylon Medical Journal, 66 (1): 44-49.
https://pubmed.ncbi.nlm.nih.gov/34984896/
International Journal of Forensic Odontology
Arambawatta,
K., Peiris, R., Hettiarachchi, K., Dissanayake, M., Ihalagedera, D.,
Abeysundara, A., Nawarathna, L. (2021). Age
estimation using pulp/tooth area ratio of maxillary and mandibular canines on
digital orthopantomographs in a sample of Sri Lankan population. International Journal of Forensic Odontology, 6 (2): 106-112.
DOI: https://doi.org/10.4103/ijfo.ijfo_21_21
International Journal of Fruit Science
H.L.D.K. Jayarathna, Lakshika S. Nawarathna, W. A. I. P. Karunaratne (2020). A Novel Approach for Predicting Yield of Seeds in Ficus Fruits Using A Non-Parametric Method. International Journal of Fruit Science, 20(3): 603-619.
DOI: https://www.tandfonline.com/doi/abs/10.1080/15538362.2019.1616653
Communications in Statistics: Case Studies, Data Analysis and Applications
G W D A Gunarathne, LS Nawarathna, RD Nawarathna, V.S.N. Vithanaarachchi (2020). Prediction of the skeletal pattern of orthodontic patients . Communications in Statistics: Case Studies, Data Analysis and Applications, .
DOI: https://www.tandfonline.com/doi/abs/10.1080/23737484.2020.1777485?journalCode=ucas20
Australian Journal of Forensic Sciences
Deepthi Nanayakkara, Amal Vadysinghe, Lakshika S. Nawarathna (2020). Prediction of the length of the femur from its fragments in a Sri Lankan population. Australian Journal of Forensic Sciences, 52(3): 303-312.
DOI: https://www.tandfonline.com/doi/abs/10.1080/00450618.2018.1524511?tab=permissions&scroll=top
APOS Trends in Orthodontics
Nishanthi Vithanaarachchi, Thimuthu Medagama, Lakshika Nawarathna (2020). Assessment of contributing factors for discontinuation of orthodontic treatment. APOS Trends in Orthodontics, 10(2): 105-110.
DOI: https://doi.org/10.25259/APOS_143_2019
Biom Biostat Int J
RAIH Dharmasena, LS Nawarathna, V.S.N. Vithanaarachchi (2020). Predicting cessation of orthodontic treatments using a classification-based approach. Biom Biostat Int J, 9(2): 61-67.
DOI: https://doi.org/10.15406/bbij.2020.09.00302
Transylvanian Review
Deepthi Nanayakkara, Tharanga Nandasena, Lakshika S Nawarathna, Sajjiv Ariyasinghe, Kapila Arambawatta, Sandeep Alahakoon (2020). Determination of Sex by Foot and Footprint Dimensions in the Sinhalese Population of Sri Lanka. Transylvanian Review, 27(50): 15448-15456.
https://transylvanianreviewjournal.org/index.php/TR/issue/view/56
Ceylon Medical Journal
Vithanaarachchi,
N., Chandrasiri, A., Nawarathna,
L. (2020). A
comparison of cephalometric measurements obtained using conventional and
digital methods. Ceylon Medical Journal, 65 (3): 39-45.
https://pubmed.ncbi.nlm.nih.gov/34800930/
Ceylon Medical Journal
Shafras,
M., Monaragala, L., Samarakkody, I., Ahamed, R.R., Nawarathna, L., Sanas, M. & Antonypillai, C. (2020). Comparison
of glycaemic control and anthropometric parameters before and after Ramadan
fasting in a selected cohort of patients with type 2 diabetes mellitus in Sri
Lanka. Ceylon Medical Journal, 65 (4): 79-85.
https://pubmed.ncbi.nlm.nih.gov/34821486/
Communications in Statistics: Case Studies, Data Analysis and Applications
Amali Jayatileke, Lakshika S. Nawarathna, Nalini Ravishanker, P. Wijekoon, Ruwan D. Nawarathna, V. S. N. Vithanaarachchi, R. L. Wijeyaweera (2019). New standards for eruption time and sequence of permanent dentition in Sri Lankan children. Communications in Statistics: Case Studies, Data Analysis and Applications, 5(2): 92-100.
DOI: https://www.tandfonline.com/doi/abs/10.1080/23737484.2019.1579075
Journal of Forensic Science and Medicine
Deepthi Nanayakkara, Amal Nishantha Vadysinghe, Lakshika S . Nawarathna, Harshana Sampath (2019). Determination of sex from the tibia in a contemporary Sri Lankan population. Journal of Forensic Science and Medicine, 5(1): 24-28.
https://www.jfsmonline.com/article.asp?issn=2349-5014;year=2019;volume=5;issue=1;spage=24;epage=28;au
APOS Trends in Orthodontics
V.S.N. Vithanaarachchi, L. S. Nawarathna (2019). Cephalometric norms for Sri Lankan Sinhalese adolescents with Class I malocclusion. APOS Trends in Orthodontics, 9(4): 230-234.
https://apospublications.com/cephalometric-norms-for-sri-lankan-sinhalese-adolescents-with-class-i-m
Sri Lanka Journal of Economic Research
WADM Welagedara, LS Nawarathna, RD Nawarathna (2019). Forecasting the Sri Lankan Population with the Gompertz and Verhulst Logistic Growth Models. Sri Lanka Journal of Economic Research, 7(1): 1-12.
DOI: https://sljer.sljol.info/articles/abstract/10.4038/sljer.v7i1.38/
Biometrics & Biostatistics International Journal
UNJ Bandara, LS Nawarathna (2018). Socioeconomic factors affecting suicides in Sri Lanka. Biometrics & Biostatistics International Journal, 7: 5: 405-411.
https://medcraveonline.com/BBIJ/BBIJ-07-00238.pdf
Asian Journal of Probability and Statistics
S.M.M. Lakmali, L.S. Nawarathna (2018). Identifying and Predicting Major Factors Affecting the Suicides in Sri Lanka. Asian Journal of Probability and Statistics, 2:3: 1-7.
https://www.journalajpas.com/index.php/AJPAS/article/view/28785
SLAAI - International Conference on Artificial Intelligence SLAAI-ICAI-2018
Maneesha M.M. Arachchi, Lakshika S. Nawarathna, Roshan Peiris, Deepthi Nanayakkara (2018). A Classification Based Approach to Predict the Gender using Craniofacial Measurements. SLAAI - International Conference on Artificial Intelligence SLAAI-ICAI-2018, 2: 19.
Biometrics & Biostatistics International Journal
SN Wijayawardhana, Lakshika S Nawarathna, Chantha Jayawardena, KM Wijerathne (2018). Appraisal of agreement between treatment procedures on deep caries lesions in the posterior permanent teeth of adults. Biometrics & Biostatistics International Journal, 7:2: 147‒154..
https://pdfs.semanticscholar.org/3b8c/04fdafebf0bd5dfb22358fb82e37a3a5bea4.pdf
Sri Lanka Dental Journal
V.S.N. Vithanaarachchi, L.S. Nawarathna, R.L. Wijeyeweera (2018). Eruption times and patterns of permanent teeth in Sri Lankan school children in Western province. Sri Lanka Dental Journal, 48(1): 25-31.
Journal of Medical Statistics and Informatics
Dassanayake, I.D. and Nawarathna, L.S. (2017). Assessing inter-rater agreement between multiple medical instruments with heteroscedastic measurements,. Journal of Medical Statistics and Informatics, 5(1).
Ceylon Medical Journal
SN Vithanaarachchi, LS Nawarathna (2017). Prevalence of anterior cross bite in preadolescent orthodontic patients attending an orthodontic clinic. Ceylon Medical Journal, 62(3): 189-192.
Sri Lanka Dental Journal
Vithanaarachchi, V.S.N., Nagarathne, S.P.N.P., Jayawardena, J.A.C.K. and Nawarathna, L.S. (2017). Assessment of factors associated with patient’s compliance in orthodontic treatment. Sri Lanka Dental Journal, 47(1): 1-12.
Journal of Biometrics & Biostatistics
B.M.S.C. Basnayake, L.S. Nawarathna (2017). Modeling and Forecasting Norway Mortality Rates using the Lee-Carter Model. Journal of Biometrics & Biostatistics, 6(1).
https://medcraveonline.com/BBIJ/BBIJ-06-00158
Journal of Medical Statistics and Informatics
Kesawan Ramesh Aravind, Lakshika S. Nawarathna (2017). A statistical method for assessing agreement between two methods of heteroscedastic clinical measurements using the copula method. Journal of Medical Statistics and Informatics, 5(3): 1-12.
Symposium on Statistical & Computational Modelling with Applications (SymSCMA-2016)
H.L.D.K. Jayarathna, L.S. Nawarathna and W.A.I.P. Karunaratne (2016). A Model for Predicting Yield of Seeds in Ficus Fruits. Symposium on Statistical & Computational Modelling with Applications (SymSCMA-2016), Uncertainty Models for the Advancement of Interdisciplinary Science: Kelaniya, Sri Lanka.
Proceedings of the Postgraduate Institute of Science Research Congress 2016, Sri Lanka
I.D. Dassanayake, L.S. Nawarathna, B.M.S.C. Basnayake (2016). Statistical methods for assessing agreement between multiple methods of heteroscedastic clinical measurements. Proceedings of the Postgraduate Institute of Science Research Congress 2016, Sri Lanka, vol. 3: p. 47.
Proceedings of the Postgraduate Institute of Science Research Congress 2016, Sri Lanka
K.R. Aravind, L.S. Nawarathna, H.M.R.R. Herath (2016). Comparison of different copula models and their applications in method comparison studies. Proceedings of the Postgraduate Institute of Science Research Congress 2016, Sri Lanka, vol. 3: p. 53.
Proceedings of the Peradeniya University International Research Sessions (iPURSE), Sri Lanka
B.M.S.C. Basnayake, L.S. Nawarathna (2016). Modeling and forecasting mortality rates: an application of the Lee-Carter model to Norway mortality data. Proceedings of the Peradeniya University International Research Sessions (iPURSE), Sri Lanka, Vol. 20: p. 269.
Proceedings of the Peradeniya University International Research Sessions(iPURSE), Sri Lanka
C.B. Wickrama, L.S. Nawarathna (2016). Factors affecting crimes in Sri Lanka,. Proceedings of the Peradeniya University International Research Sessions(iPURSE), Sri Lanka, Vol. 20: p. 272.
Proceedings of the Peradeniya University International Research Sessions(iPURSE), Sri Lanka
H.L.D.K. Jayarathna, L.S. Nawarathna, W.A.I.P. Karunaratne (2016). Predicting seed yield of Ficus fruits by fruit dimensions,. Proceedings of the Peradeniya University International Research Sessions(iPURSE), Sri Lanka, Vol. 20: p. 274.
Proceedings of the Peradeniya University International Research Sessions(iPURSE), Sri Lanka
S.N.Wijayawardhana, L.S. Nawarathna, K.M.Wijerathne (2016). Evaluating the best treatment procedure for deep caries lesions in posterior permanent teeth,. Proceedings of the Peradeniya University International Research Sessions(iPURSE), Sri Lanka, Vol. 20: p. 276.
Proceedings of the Peradeniya University International Research Sessions(iPURSE), Sri Lanka
P.M. Jayasinghe, V. Herath, L.S. Nawarathna (2016). Co-expression analysis of DREB family transcription factors in rice,. Proceedings of the Peradeniya University International Research Sessions(iPURSE), Sri Lanka, Vol. 20: p. 290.
Statistics in Medicine
Nawarathna, L.S. and Choudhary, P.K. (2015). A Heteroscedastic Measurement Error Model for Method Comparison Data with Replicate Measurements. Statistics in Medicine, 34(7): 1242–1258.
Proceedings of Peradeniya University International Research Sessions (iPURSE), Sri Lanka
Aravind, K. R. and Nawarathna, L. S. (2015). A Copula based method for analyzing method comparison data,. Proceedings of Peradeniya University International Research Sessions (iPURSE), Sri Lanka, Vol. 19: p. 273.
Proceedings of Peradeniya University International Research Sessions (iPURSE), Sri Lanka
Srikanthan, A. and Nawarathna, L.S. (2015). Analysis of major risk factors contributing to suicide using Logistic regression method,. Proceedings of Peradeniya University International Research Sessions (iPURSE), Sri Lanka, Vol. 19: p. 274.
Proceedings of Peradeniya University International Research Sessions (iPURSE), Sri Lanka
Herath, H.M. R. R., Nawarathna, L. S. and Jayasuriya, K. M. G. G. (2015). Correlation of seed dormancy storage behaviour to other seed and plant traits; A study of hundred fabaceae species from Sri Lanka,. Proceedings of Peradeniya University International Research Sessions (iPURSE), Sri Lanka, Vol. 19: p. 371.
Conference of Texas Statisticians, The University of Texas at Dallas
Nawarathna, L.S. and Choudhary, P.K. (2014). A Measurement Error Model for Method Comparison Data, at the. Conference of Texas Statisticians, The University of Texas at Dallas, Richardson, TX, USA.
ProQuest Dissertation and Theses Database
Nawarathna, L.S. (2014). Heteroscedastic Models for Method Comparison Data, (Doctoral Dissertation). ProQuest Dissertation and Theses Database, (Publication Number: 3634471, Document ID: 1612551465).
International Conference on Ordered Data Analysis, Models, and Health Research Methods
Nawarathna, L. S. and Choudhary, P. K. (2014). A Measurement Error Model for Method Comparison Data, at the. International Conference on Ordered Data Analysis, Models, and Health Research Methods, The University of Texas at Dallas, Richardson, TX, USA.
International Conference on Statistics and Society in the New Information Age: Challenges and Opportunities
Nawarathna, L. S. and Choudhary, P. K. (2014). Measuring Agreement in Method Comparison Studies with Heteroscedastic Measurements, at the. International Conference on Statistics and Society in the New Information Age: Challenges and Opportunities, Colombo, Sri Lanka.
Statistics in Medicine
Nawarathna, L.S. and Choudhary, P.K. (2013). Measuring Agreement in Method Comparison Studies with Heteroscedastic Measurements,. Statistics in Medicine, 32: 5156-5171.
Conference of Texas Statisticians
Nawarathna, L.S. and Choudhary, P.K. (2013). Measuring Agreement in Method Comparison Studies with Heteroscedastic Measurements, at the. Conference of Texas Statisticians, Rice University, Houston, TX, USA.
Joint Statistical Meetings 2013
Nawarathna, L. S. and Choudhary, P. K. (2013). Evaluation of Agreement with Heteroscedastic Method Comparison Data, at the. Joint Statistical Meetings 2013, Montreal Quebec, Canada.
International Conference on Statistics, Science, and Society: New Challenges and Opportunities
Nawarathna, L. S. and Choudhary, P. K. (2013). Measuring Agreement in Method Comparison Studies with Heteroscedastic Measurements, at the. International Conference on Statistics, Science, and Society: New Challenges and Opportunities, Chennai, India.