Ørnulf Borgan
Research interests

Survival and event history analysis

Casecontrol designs
Professional background
Ørnulf Borgan has been associate professor (19841993) and professor (19932020) in statistics at the Department of Mathematics, University of Oslo. He is now professor emeritus. Borgan's main research interest is survival and event history analysis, with a particular emphasis on methodology based on counting processes, and casecontrol studies. He has published a number of papers about these themes. He is coauthor of the monographs Statistical Models Based on Counting Processes (Springer, 1993) and Survival and Event History Analysis: A Process Point of View (Springer, 2008) and one of the editors of Handbook of Statistical Methods for CaseControl Studies (Chapman and Hall, 2018). Borgan has been associate editor of Annals of Statistics (19982003), Scandinavian Journal of Statistics (19972003), and Biometrical Journal (20132017), and in the period 20072009 he was together with Bo Lindqvist editorinchief of Scandinavian Journal of Statistics.
CV
Publications

Kvamme, Håvard & Borgan, Ørnulf (2021). Continuous and discretetime survival prediction with neural networks. Lifetime Data Analysis. ISSN 13807870. 27(4), p. 710–736. doi: 10.1007/s10985021095326.

Lingjærde, Camilla; Lien, Tonje G.; Borgan, Ørnulf; Bergholtz, Helga & Glad, Ingrid K. (2021). Tailored graphical lasso for data integration in gene network reconstruction. BMC Bioinformatics. ISSN 14712105. 22(1). doi: 10.1186/s1285902104413z.

Nedkvitne, Eirik Nøst; Borgan, Ørnulf; Eriksen, Dag Øistein & Rui, Haakon Marius Vatten (2021). Variation in chemical composition of MSWI fly ash and dry scrubber residues. Waste Management. ISSN 0956053X. 126, p. 623–631. doi: 10.1016/j.wasman.2021.04.007.

Riiser, Even Sannes; Haverkamp, Thomas Hendricus Augustus; Varadharajan, Srinidhi; Borgan, Ørnulf; Jakobsen, Kjetill Sigurd & Jentoft, Sissel [Show all 7 contributors for this article] (2020). Metagenomic Shotgun Analyses Reveal Complex Patterns of Intra and Interspecific Variation in the Intestinal Microbiomes of Codfishes. Applied and Environmental Microbiology. ISSN 00992240. 86(6), p. 1–16. doi: 10.1128/AEM.0278819.

Pladsen, Arne Valebjørg; Nilsen, Gro; Rueda, Oscar M.; Aure, Miriam Ragle; Borgan, Ørnulf & Liestøl, Knut [Show all 18 contributors for this article] (2020). DNA copy number motifs are strong and independent predictors of survival in breast cancer. Communications Biology. ISSN 23993642. 3. doi: 10.1038/s4200302008846. Full text in Research Archive

Kvamme, Håvard; Borgan, Ørnulf & Scheel, Ida (2019). TimetoEvent Prediction with Neural Networks and Cox Regression. Journal of machine learning research. ISSN 15324435. 20(129), p. 1–30. Full text in Research Archive

Riiser, Even Sannes; Haverkamp, Thomas Hendricus Augustus; Varadharajan, Srinidhi; Borgan, Ørnulf; Jakobsen, Kjetill Sigurd & Jentoft, Sissel [Show all 7 contributors for this article] (2019). Switching on the light: using metagenomic shotgun sequencing to characterize the intestinal microbiome of Atlantic cod. Environmental Microbiology. ISSN 14622912. 21(7), p. 2576–2594. doi: 10.1111/14622920.14652. Full text in Research Archive

Borgan, Ørnulf & Keilman, Nico (2019). Do Japanese and Italian Women Live Longer than Women in Scandinavia? European Journal of Population. ISSN 01686577. 35(1), p. 87–99. doi: 10.1007/s1068001894682. Full text in Research Archive Show summary

Riiser, Even Sannes; Haverkamp, Thomas Hendricus Augustus; Borgan, Ørnulf; Jakobsen, Kjetill Sigurd; Jentoft, Sissel & Star, Bastiaan (2018). A single vibrionales 16S rRNA oligotype dominates the intestinal microbiome in two geographically separated Atlantic cod populations. Frontiers in Microbiology. ISSN 1664302X. 9. doi: 10.3389/fmicb.2018.01561. Full text in Research Archive

Ergon, Torbjørn; Borgan, Ørnulf; Nater, Chloé Rebecca & Vindenes, Yngvild (2018). The utility of mortality hazard rates in population analyses. Methods in Ecology and Evolution. ISSN 2041210X. 9, p. 2046–2056. doi: 10.1111/2041210X.13059.

Borgan, Ørnulf (2018). Nested CaseControl Studies: A Counting Process Approach. In Borgan, Ørnulf; Breslow, Norman E.; Chatterjee, Nilanjan; Gail, Mitchell H.; Scott, Alastair & Wild, Christopher J. (Ed.), Handbook of Statistical Methods for CaseControl Studies. CRC Press. ISSN 9781498768580. p. 329–349.

Borgan, Ørnulf & Samuelsen, Sven Ove (2018). Cohort Sampling for TimetoEvent Data: An Overview. In Borgan, Ørnulf; Breslow, Norman E.; Chatterjee, Nilanjan; Gail, Mitchell H.; Scott, Alastair & Wild, Christopher J. (Ed.), Handbook of Statistical Methods for CaseControl Studies. CRC Press. ISSN 9781498768580. p. 285–301.

Lien, Tonje Gulbrandsen; Borgan, Ørnulf; Reppe, Sjur; Gautvik, Kaare M & Glad, Ingrid Kristine (2018). Integrated analysis of DNAmethylation and gene expression using highdimensional penalized regression: a cohort study on bone mineral density in postmenopausal women. BMC Medical Genomics. ISSN 17558794. 11(24). doi: 10.1186/s1292001803412. Full text in Research Archive

Borgan, Ørnulf (2015). Aalen–Johansen Estimator. In Balakrishnan, N.; Brandimarte, Paolo; Everitt, Brian S.; Molenberghs, Geert; Piegorsch, Walter W. & Ruggeri, Fabrizio (Ed.), Wiley StatsRef: Statistics Reference Online. John Wiley & Sons. ISSN 9781118445112.

Borgan, Ørnulf & Zhang, Ying (2015). Using Cumulative Sums of Martingale Residuals for Model Checking in Nested CaseControl Studies. Biometrics. ISSN 0006341X. 71(3), p. 696–703. doi: 10.1111/biom.12308.

Strohmaier, Susanne; Røysland, Kjetil; Hoff, Rune; Borgan, Ørnulf; Pedersen, Terje Rolf & Aalen, Odd O. (2015). Dynamic path analysis  a useful tool to investigate mediation processes in clinical survival trials. Statistics in Medicine. ISSN 02776715. 34(29), p. 3866–3887. doi: 10.1002/sim.6598.

Gran, Jon Michael; Lie, Stein Atle; Øyeflaten, Irene Larsen; Borgan, Ørnulf & Aalen, Odd O. (2015). Causal inference in multistate modelssickness absence and work for 1145 participants after work rehabilitation. BMC Public Health. ISSN 14712458. 15:1082. doi: 10.1186/s1288901524088. Full text in Research Archive

Borgan, Ørnulf & Keogh, Ruth (2015). Nested case–control studies: should one break the matching? Lifetime Data Analysis. ISSN 13807870. 21(4), p. 517–541. doi: 10.1007/s109850159319y.

Günther, ClaraCecilie; Tvete, Ingunn Fride; Aas, Kjersti; Sandnes, Geir Inge & Borgan, Ørnulf (2014). Modelling and predicting customer churn from an insurance company. Scandinavian Actuarial Journal. ISSN 03461238. p. 58–71. doi: 10.1080/03461238.2011.636502. Show summary

Günther, ClaraCecilie; Tvete, Ingunn Fride; Aas, Kjersti; Hagen, Jørgen Andreas; Kvifte, Lars & Borgan, Ørnulf (2014). Predicting Future Claims Among High Risk Policyholders Using Random Effects. In Silvestrov, Dmitrii & MartinLöf, Anders (Ed.), Modern Problems in Insurance Mathematics. Springer. ISSN 9783319066523. p. 171–186. doi: 10.1007/9783319066530_11. Show summary

Nilsen, Gro; Borgan, Ørnulf; Liestøl, Knut & Lingjærde, Ole Christian (2013). Identifying clusters in genomics data by recursive partitioning. Statistical Applications in Genetics and Molecular Biology. ISSN 15446115. 12(5), p. 637–652. doi: 10.1515/sagmb20130016.

Borgan, Ørnulf & Samuelsen, Sven Ove (2013). Nested CaseControl and CaseCohort Studies. In Klein, John P; van Houwelingen, Hans C; Ibrahim, Joseph G & Scheike, Thomas H (Ed.), Handbook of Survival Analysis. CRC Press. ISSN 9781466555662. p. 343–367.

Paulsen, Jonas; Lien, Tonje Gulbrandsen; Sandve, Geir Kjetil; Holden, Lars; Borgan, Ørnulf & Glad, Ingrid Kristine [Show all 7 contributors for this article] (2013). Handling realistic assumptions in hypothesis testing of 3D colocalization of genomic elements. Nucleic Acids Research (NAR). ISSN 03051048. 41(10), p. 5164–5174. doi: 10.1093/nar/gkt227. Show summary

Aldrin, Magne; Lyngstad, Trude Marie; Kristoffersen, Anja Bråthen; Storvik, Bård; Borgan, Ørnulf & Jansen, Peder Andreas (2011). Modelling the spread of infectious salmon anaemia among salmon farms based on seaway distances between farms and genetic relationships between infectious salmon anaemia virus isolates. Journal of the Royal Society Interface. ISSN 17425689. 8(62), p. 1346–1356. doi: 10.1098/rsif.2010.0737.

Bøvelstad, Hege & Borgan, Ørnulf (2011). Assessment of evaluation criteria for survival prediction from genomic data. Biometrical Journal. ISSN 03233847. 53(2), p. 202–216. doi: 10.1002/bimj.201000048.

Moger, Tron Anders; Haugen, Marion; Yip, Benjamin H. K.; Gjessing, Håkon & Borgan, Ørnulf (2011). A hierarchical frailty model applied to twogeneration melanoma data. Lifetime Data Analysis. ISSN 13807870. 17(3), p. 445–460. doi: 10.1007/s1098501091883.

Bøvelstad, Hege; Nygård, Ståle & Borgan, Ørnulf (2009). Survival prediction from clinicogenomic models  a comparative study. BMC Bioinformatics. ISSN 14712105. 10. doi: 10.1186/1471210510413. Full text in Research Archive Show summary

Aalen, Odd O.; Andersen, Per Kragh; Borgan, Ørnulf; Gill, Richard D. & Keiding, Niels (2009). History of applications of martingales in survival analysis. Journal Électronique d'Histoire des Probabililtés et de la Statistique. ISSN 17730074. 5(1), p. 1–28.

Moger, Tron Anders; Pawitan, Yudi & Borgan, Ørnulf (2008). Casecohort methods for survival data on families from routine registers. Statistics in Medicine. ISSN 02776715. 27, p. 1062–1074. doi: 10.1002/sim.3004.

Nygård, Ståle; Borgan, Ørnulf; Lingjærde, Ole Christian & Størvold, Hege Leite (2008). Partial least squares Cox regression for genomewide data. Lifetime Data Analysis. ISSN 13807870. 14, p. 179–195. doi: 10.1007/s1098500790767.

Borgan, Ørnulf (2007). Event history analysis: An overview and some areas of current research. In Østreng, Willy (Eds.), Consilience. Centre for Advanced Study at the Norwegian Academy of Science and Letters. ISSN 9788299636742. p. 60–64.

Borgan, Ørnulf & Langholz, Bryan (2007). Using martingale residuals to assess goodnessoffit for sampled risk set data. In Nair, Vijay (Eds.), Advances in statistical modeling and inference. Essays in honor of Kjell A. Doksum. World Scientific. ISSN 9812703691. p. 65–90.

Gunnes, Nina; Borgan, Ørnulf & Aalen, Odd O. (2007). Estimating stage occupation probabilities in nonMarkov models. Lifetime Data Analysis. ISSN 13807870. 13, p. 211–240. doi: 10.1007/s1098500790344.

Borgan, Ørnulf; Fiaccone, RL; Henderson, R & Barreto, ML (2007). Dynamic analysis of recurrent event data with missing observations, with application to infant diarrhoea in Brazil. Scandinavian Journal of Statistics. ISSN 03036898. 34, p. 53–69. doi: 10.1111/j.14679469.2006.00525.x.

Langerod, A; Zhao, H; Borgan, Ørnulf; Nesland, Jahn M; Bukholm, IR & Ikdahl, T [Show all 9 contributors for this article] (2007). TP53 mutation status and gene expression profiles are powerful prognostic markers of breast cancer. Breast Cancer Research. ISSN 14655411. 9. doi: 10.1186/bcr1675.

Bøvelstad, Hege; Nygård, Ståle; Størvold, Hege Leite; Aldrin, Magne; Borgan, Ørnulf & Frigessi, Arnoldo [Show all 7 contributors for this article] (2007). Predicting survival from microarray data  a comparative study. Bioinformatics. ISSN 13674803. 23, p. 2080–2087. doi: 10.1093/bioinformatics/btm305.

Stavem, K; Bjortuft, O; Borgan, Ørnulf; Geiran, O & Boe, J (2006). Lung transplantation in patients with chronic obstructive pulmonary disease in a national cohort is without obvious survival benefit. The Journal of Heart and Lung Transplantation. ISSN 10532498. 25.

Fosen, Johan; Borgan, Ørnulf; WeedonFekjaer, H & Aalen, Odd Olai (2006). Dynamic analysis of recurrent event data using the additive hazard model. Biometrical Journal. ISSN 03233847. 48, p. 381–398.

Fosen, Johan; Ferkingstad, Egil; Borgan, Ørnulf & Aalen, Odd O. (2006). Dynamic path analysis  a new approach to analyzing timedependent covariates. Lifetime Data Analysis. ISSN 13807870. 12, p. 143–167.

Aalen, Odd Olai; Fosen, Johan; WeedonFekjær, Harald; Borgan, Ørnulf & Husebye, Einar (2004). Dynamic analysis of multivariate failure time data. Biometrics. ISSN 0006341X. 60, p. 764–773.

Borgan, Ørnulf & Samuelsen, Sven Ove (2003). A review of cohort sampling designs for Cox's regression model: Potentials in epidemiology. Norsk Epidemiologi. ISSN 08032491. 13(2), p. 239–248.

Borgan, Ørnulf (2002). Estimation of covariatedependent Markov transition probabilites from nested casecontrol data. Statistical Methods in Medical Research. ISSN 09622802. 11, p. 183–202.

Aalen, Odd Olai; Borgan, Ørnulf & WeedonFekjær, Harald (2001). Covariate adjustment of event histories estimated from Markov chains: The additive approach. Biometrics. ISSN 0006341X. 57, p. 993–1001.

Borgan, Ørnulf; Langholz, Bryan; Samuelsen, Sven Ove; Goldstein, Larry & Pogoda, Janice (2000). Exposure stratified casecohort designs. Lifetime Data Analysis. ISSN 13807870. 6, p. 39–58.

Borgan, Ørnulf & Olsen, Espen F. (1999). The efficiency of simple and countermatched nested casecontrol sampling. Scandinavian Journal of Statistics. ISSN 03036898. 26, p. 493–509.

Zhang, Jian & Borgan, Ørnulf (1999). Aalen's linear model for sampled risk set data: a large sample study. Lifetime Data Analysis. ISSN 13807870. 5, p. 345–363.

Borgan, Ørnulf & Langholz, Bryan (1998). Risk set sampling for proportional hazards models. In Everitt, Brian S. & Dunn, Graham (Ed.), Statistical Analysis of Medical Data: New Developments. Arnold, London. ISSN 0340677759. p. 75–100.

Borgan, Ørnulf & Langholz, Bryan (1997). Estimation of excess risk from casecontrol data using Aalen's linear regression model. Biometrics. ISSN 0006341X. 53, p. 690–697.

Langholz, Bryan & Borgan, Ørnulf (1997). Estimation of absolute risk from nested casecontrol data. Biometrics. ISSN 0006341X. 53, p. 767–774.

Grønnesby, Jon Ketil & Borgan, Ørnulf (1996). A method for checking regression models in survival analysis based on the risk score. Lifetime Data Analysis. ISSN 13807870. 2, p. 315–328.

Langholz, Bryan & Borgan, Ørnulf (1995). Countermatching: A stratified nested casecontrol sampling method. Biometrika. ISSN 00063444. 82, p. 69–79.

Borgan, Ørnulf; Goldstein, Larry & Langholz, Bryan (1995). Methods for the analysis of sampled cohort data in the Cox proportional hazards model. Annals of Statistics. ISSN 00905364. 23, p. 1749–1778.

Borgan, Ørnulf & Langholz, Bryan (1993). Nonparametric estimation of relative mortality from nested casecontrol studies. Biometrics. ISSN 0006341X. 49, p. 593–602.

Borgan, Ørnulf & Liestøl, Knut (1990). A note on confidence intervals and bands for the survival function based on transformations. Scandinavian Journal of Statistics. ISSN 03036898. 17, p. 35–41.

Borgan, Ørnulf & Hoem, Jan M (1988). Demographic reproduction rates and the estimation of an expected total count per person in an open population. Journal of the American Statistical Association. ISSN 01621459. 83, p. 886–891.

Andersen, Per Kragh; Borgan, Ørnulf; Gill, Richard D. & Keiding, Niels (1988). Censoring, truncation and filtering in statistical models based on counting processes. Contemporary Mathematics. ISSN 02714132. 80, p. 19–60.

Bie, Ole; Borgan, Ørnulf & Liestøl, Knut (1987). Confidence intervals and confidence bands for the cumulative hazard rate function and their small sample properties. Scandinavian Journal of Statistics. ISSN 03036898. 14, p. 221–233.

Borgan, Ørnulf & RamaluHansen, Henrik (1985). Demographic incidence rates and estimation of intensities with incomplete information. Annals of Statistics. ISSN 00905364. 13, p. 564–582.

Andersen, Per Kragh & Borgan, Ørnulf (1985). Counting process models for life history data (with discussion). Scandinavian Journal of Statistics. ISSN 03036898. 12, p. 97–158.

Borgan, Ørnulf; Liestøl, Knut & Ebbesen, Peter (1984). Efficiencies of experimental designs for an illnessdeath model. Biometrics. ISSN 0006341X. 40, p. 627–638.

Borgan, Ørnulf (1984). Maximum likelihood estimation in parametric counting process models, with applications to censored failure times data. Scandinavian Journal of Statistics. ISSN 03036898. 11, p. 1–16.

Ebbesen, Peter; Borgan, Ørnulf & Liestøl, Knut (1983). Decreasing luekemia risk in old AKR mice. Experimental Gerontology. ISSN 05315565. 18, p. 347–353.

Borgan, Ørnulf; Menné, Torkil & Green, Anders (1982). Interaction between nickel allergy and hand eczema in the Danish female population. Scandinavian Journal of Statistics. ISSN 03036898. 9, p. 183–185.

Andersen, Per Kragh; Borgan, Ørnulf; Gill, Richard D. & Keiding, Niels (1982). Linear nonparametric tests for comparison of counting processes, with application to censored survival data (with discussion). International Statistical Review. ISSN 03067734. 50, p. 219–258.

Menné, Torkil; Borgan, Ørnulf & Green, Anders (1982). Nickel allergy and hand dermatitis in a stratified sample of the Danish female population. An epidemiological study including a statistical appendix. Acta DermatoVenereologica. ISSN 00015555. 62, p. 35–41.

Borgan, Ørnulf (1981). Applications of nonhomogeneous Markov chains to medical studies. Nonparametric analysis for prospective and retrospective data. In Victor, N; Lehmacher, W & van Eimeren, W (Ed.), Explorative Datenanalyse, Frühjahrstagung der GMDS München, 1980, Proceedings. Springer. ISSN 3540102817. p. 102–115.

Borgan, Ørnulf (1981). A nonasymptotic criterion for the evaluation of automobile bonus systems. Scandinavian Actuarial Journal. ISSN 03461238. p. 165–178.

Aalen, Odd O.; Borgan, Ørnulf; Keiding, Niels & Thorman, Jens (1980). Interaction between life history events. Nonparametric analysis for prospective and retrospective data in the presence of censoring. Scandinavian Journal of Statistics. ISSN 03036898. 7, p. 161–171.

Borgan, Ørnulf (1979). Comparison of two sequential tests for twosided alternatives. Journal of The Royal Statistical Society Series Bstatistical Methodology. ISSN 13697412. 41, p. 101–106.

Borgan, Ørnulf (1979). On the theory of moving average graduation. Scandinavian Actuarial Journal. ISSN 03461238. p. 83–105.

Borgan, Ørnulf; Borge, Inger Christin; Engeseth, John; Heir, Odd; Moe, Håvard & Norderhaug, Tea Toft [Show all 7 contributors for this article] (2021). Matematikk S1. Aschehoug & Co. ISBN 9788203408946. 375 p.

Borgan, Ørnulf; Borge, Inger Christin; Engeseth, John; Heir, Odd; Moe, Håvard & Norderhaug, Tea Toft [Show all 7 contributors for this article] (2021). Matematikk R1. Aschehoug & Co. ISBN 9788203408847. 414 p.

Borgan, Ørnulf; Breslow, Norman E.; Chatterjee, Nilanjan; Gail, Mitchell H.; Scott, Alastair & Wild, Christopher J. (2018). Handbook of Statistical Methods for CaseControl Studies. CRC Press. ISBN 9781498768580. 536 p.

Aalen, Odd O.; Borgan, Ørnulf & Gjessing, Håkon K. (2008). Survival and Event History Analysis: A Process Point of View. Springer. ISBN 9780387202877. 539 p.

Andersen, Per; Borgan, Ørnulf; Gill, Richard D. & Keiding, Niels (1993). Statistical models based on counting processes. SpringerVerlag, New York. ISBN 01727397. 767 p.

Borgan, Ørnulf (2009). Inference and prediction in multistate models: the additive approach. 57th Session of the International Statistical Institute.

Borgan, Ørnulf (2007). Discussion contribution to D. Zeng and D.Y. Lin's paper "Maximum likelihood estimation in semiparametric regression models with censored data". Journal of The Royal Statistical Society Series Bstatistical Methodology. ISSN 13697412. 69(4), p. 545–545.

Borgan, Ørnulf & Bo H., Lindqvist (2007). Editorial. Scandinavian Journal of Statistics. ISSN 03036898. 34(1), p. 1–2.

Senn, S; Keiding, N; Andrews, N; Musonda, P; Hocine, M & Moreau, T [Show all 16 contributors for this article] (2006). Semiparametric analysis of case series data  Discussion. The Journal of the Royal Statistical Society, Series C (Applied Statistics). ISSN 00359254. 55, p. 581–594.

Borgan, Ørnulf; Aalen, Odd O. & Røsjø, Bjarne (2005). Bedre statistikk kan redde flere liv. [Newspaper]. Informasjonsblad nr 2/2005. Senter for grunnforskning.

Borgan, Ørnulf (2004). Sverdrup, Erling (19171994). In Teugels, Jozef & Sund, Ståle (Ed.), Encyclopedia of Actuarial Science. John Wiley & Sons. ISSN 0470846763. p. 1665–1666.

Borgan, Ørnulf (2003). Review of "The Statistical Analysis of Failure Time Data" by J.D. Kalbfleisch and R.L. Prentice. Journal of the American Statistical Association. ISSN 01621459. 98(464), p. 1084–1085.

Borgan, Ørnulf (2001). Review of "Modeling Survival Data: Extending the Cox Model" by T. M. Therneau and P. M. Grambsch. Statistics in Medicine. ISSN 02776715. 20, p. 2053–2054.

Borgan, Ørnulf (2001). Cohort sampling in epidemiological studies. 53rd Session of The International Statistical Institute.

Borgan, Ørnulf (1999). Nested casecontrol sampling. In Kotz, Samuel; Read, CB & Banks, DL (Ed.), Encyclopedia of Statistical Sciences. Wiley, New York. p. 523–528.

Borgan, Ørnulf (1999). Countermatched sampling. In Kotz, Samuel; Read, CB & Banks, DL (Ed.), Encyclopedia of Statistical Sciences. Wiley, New York. p. 129–131.

Borgan, Ørnulf (1999). Review of "Applied survival analysis" by C.T. Lee. Statistics in Medicine. ISSN 02776715. 18, p. 492–494.

Borgan, Ørnulf (1998). NelsonAalen estimator. In Armitage, Peter & Colton, Theodore (Ed.), Encyclopedia of Biostatistics. Wiley, New York. ISSN 0471975761. p. 2967–2972.

Borgan, Ørnulf (1998). KaplanMeier estimator. In Armitage, Peter & Colton, Theodore (Ed.), Encyclopedia of Biostatistics. Wiley, New York. ISSN 0471975761. p. 2154–2160.

Borgan, Ørnulf (1998). AalenJohansen estimator. In Armitage, Peter & Colton, Theodore (Ed.), Encyclopedia of Biostatistics. Wiley, New York. ISSN 0471975761. p. 5–10.

Borgan, Ørnulf (1989). Discussion contribution to E. Arjas' paper "Survival models and martingale dynamics". Scandinavian Journal of Statistics. ISSN 03036898. 16, p. 214–215.

Günther, ClaraCecilie; Tvete, Ingunn Fride; Aas, Kjersti & Borgan, Ørnulf (2010). Modellering og prediksjon av kundeavgang. Norsk Regnesentral.