Selected publications

Røysland, K., Ryalen, P. C., Nygård, M., & Didelez, V. (2025). Graphical criteria for the identification of marginal causal effects in continuous-time survival and event-history analyses. Journal of the Royal Statistical Society Series B: Statistical Methodology, 87(1), 74-97.
Janvin, M., Ryalen, P. C., Sarvet, A. L., & Stensrud, M. J. (2025). A positivity robust strategy to study effects of switching treatment. Biometrics, 81(3).
Maltzahn, N. N., Mehlum, I. S., & Gran, J. M. (2024). Separable and controlled direct effects for competing events: Estimation of component specific effects on sickness absence. Statistics in Medicine, 43(22), 4305-4327.
Janvin, M., Young, J. G., Ryalen, P. C., & Stensrud, M. J. (2024). Causal inference with recurrent and competing events. Lifetime data analysis, 30(1), 59-118.
Keogh, R. H., Gran, J. M., Seaman, S. R., Davies, G., & Vansteelandt, S. (2023). Causal inference in survival analysis using longitudinal observational data: Sequential trials and marginal structural models. Statistics in medicine, 42(13), 2191-2225.
Brathovde, M., Moger, T. A., Aalen, O. O., Grotmol, T., Veierød, M. B., & Valberg, M. (2023). A lean additive frailty model: With an application to clustering of melanoma in Norwegian families. Statistics in Medicine, 42(23), 4207-4235.
Hoff, R., Maltzahn, N., Hasting, R. L., Merkus, S. L., Undem, K., Kristensen, P., ... & Gran, J. M. (2022). An initiative for a more inclusive working life and its effect on return-to-work after sickness absence: a multistate longitudinal cohort study. BMJ open, 12(11).
Ryalen, P. C., Møller, B., Laache, C. H., Stensrud, M. J., & Røysland, K. (2021). Prognosis of cancer survivors: estimation based on differential equations. Biostatistics, 24(2), 345-357.
Maltzahn, N., Hoff, R., Aalen, O. O., Mehlum, I. S., Putter, H., & Gran, J. M. (2021). A hybrid landmark Aalen-Johansen estimator for transition probabilities in partially non-Markov multi-state models. Lifetime data analysis, 27(4), 737-760.
Keogh, R. H., Seaman, S. R., Gran, J. M., & Vansteelandt, S. (2021). Simulating longitudinal data from marginal structural models using the additive hazard model. Biometrical Journal, 63(7), 1526-1541.
Aalen, O. O., Stensrud, M. J., Didelez, V., Daniel, R., Røysland, K., & Strohmaier, S. (2020). Time‐dependent mediators in survival analysis: Modeling direct and indirect effects with the additive hazards model. Biometrical Journal, 62(3), 532-549.
Ryalen, P. C., Stensrud, M. J., Fosså, S., & Røysland, K. (2020). Causal inference in continuous time: an example on prostate cancer therapy. Biostatistics, 21(1), 172-185.
Hoff, R., Putter, H., Mehlum, I. S., & Gran, J. M. (2019). Landmark estimation of transition probabilities in non-Markov multi-state models with covariates. Lifetime data analysis, 25(4), 660-680.
Stensrud, M. J., Aalen, J. M., Aalen, O. O., & Valberg, M. (2019). Limitations of hazard ratios in clinical trials. European heart journal, 40(17), 1378-1383..
Stensrud, M. J., Røysland, K., & Ryalen, P. C. (2019). On null hypotheses in survival analysis. Biometrics, 75(4), 1276-1287.
Stensrud, M. J., Ryalen, P. C., & Røysland, K. (2019). Sufficient Cause Interaction for Time-to-event Outcomes. Epidemiology, 30(2), 189-196.
Ryalen, P. C., Stensrud, M. J., & Røysland, K. (2019). The additive hazard estimator is consistent for continuous-time marginal structural models. Lifetime data analysis, 25(4), 611-638.
Djordjilović, V., Page, C. M., Gran, J. M., Nøst, T. H., Sandanger, T. M., Veierød, M. B., & Thoresen, M. (2019). Global test for high‐dimensional mediation: Testing groups of potential mediators. Statistics in medicine, 38(18), 3346-3360.
Ryalen, P. C., Stensrud, M. J., & Røysland, K. (2018). Transforming cumulative hazard estimates. Biometrika, 105(4), 905-916.
Aalen, O. O., Gran, J. M., Røysland, K., Stensrud, M. J., & Strohmaier, S. (2018). Feedback and Mediation in Causal Inference Illustrated by Stochastic Process Models. Scandinavian Journal of Statistics, 45(1), 62-86.
Gran, J. M., Hoff, R., Røysland, K., Ledergerber, B., Young, J., & Aalen, O. O. (2018). Estimating the treatment effect on the treated under time‐dependent confounding in an application to the Swiss HIV Cohort Study. Journal of the Royal Statistical Society: Series C (Applied Statistics), 67(1), 103-125.
Valberg, M., Stensrud, M. J., & Aalen, O. O. (2018). The surprising implications of familial association in disease risk. BMC Public Health, 18(1), 135.
Hoff, R., Corbett, K., Mehlum, I. S., Mohn, F. A., Kristensen, P., Hanvold, T. N., & Gran, J. M. (2018). The impact of completing upper secondary education-a multi-state model for work, education and health in young men. BMC Public Health, 18(1), 556.
Iuliano, A. D., Roguski, K. M., Chang, H. H., Muscatello, D. J., Palekar, R., Tempia, S., Cohen, C., Gran, J. M., ... & Wu, P. (2018). Estimates of global seasonal influenza-associated respiratory mortality: a modelling study. The Lancet, 391(10127), 1285-1300.
Stensrud, M. J., & Valberg, M. (2017). Inequality in genetic cancer risk suggests bad genes rather than bad luck. Nature Communications, 8(1), 1165.
Stensrud, M. J., Valberg, M., Røysland, K., & Aalen, O. O. (2017). Exploring Selection Bias by Causal Frailty Models. Epidemiology, 28(3), 379-386.
Prague, M., Commenges, D., Gran, J. M., Ledergerber, B., Young, J., Furrer, H., & Thiébaut, R. (2017). Dynamic models for estimating the effect of HAART on CD4 in observational studies: Application to the Aquitaine Cohort and the Swiss HIV Cohort Study. Biometrics, 73(1), 294-304.
Stensrud, M. J., Valberg, M., & Aalen, O. O. (2017). Can Collider Bias Explain Paradoxical Associations?. Epidemiology, 28(4), e39-e40.
Stensrud, M. J., Strohmaier, S., Valberg, M., & Aalen, O. O. (2017). Can chance cause cancer? A causal consideration. European Journal of Cancer, 75, 83-85.
Valberg, M., Grotmol, T., Tretli, S., Veierød, M. B., Moger, T. A., Devesa, S. S., & Aalen, O. O. (2017). Prostate-specific antigen testing for prostate cancer: Depleting a limited pool of susceptible individuals?. European journal of epidemiology, 32(6), 511-520.
Aalen, O. O., Røysland, K., Gran, J. M., Kouyos, R., & Lange, T. (2016). Can we believe the DAGs? A comment on the relationship between causal DAGs and mechanisms. Statistical methods in medical research, 25(5), 2294-2314.
Aalen, O. O., Cook, R. J., & Røysland, K. (2015). Does Cox analysis of a randomized survival study yield a causal treatment effect?. Lifetime data analysis, 21(4), 579-593.
Gran, J. M., Lie, S. A., Øyeflaten, I., Borgan, Ø., & Aalen, O. O. (2015). Causal inference in multi-state models–sickness absence and work for 1145 participants after work rehabilitation. BMC public health, 15(1), 1082.
Strohmaier, S., Røysland, K., Hoff, R., Borgan, Ø., Pedersen, T. R., & Aalen, O. O. (2015). Dynamic path analysis–a useful tool to investigate mediation processes in clinical survival trials. Statistics in medicine, 34(29), 3866-3887.
Corbett, K., Gran, J. M., Kristensen, P., & Mehlum, I. S. (2015). Adult social position and sick leave: the mediating effect of physical workload. Scandinavian journal of work, environment & health, 542-553.
Aalen, O. O., Valberg, M., Grotmol, T., & Tretli, S. (2014). Understanding variation in disease risk: the elusive concept of frailty. International journal of epidemiology, 44(4), 1408-1421.
Hoff, R., Gran, J. M., & Farewell, D. (2014). Farewell's Linear Increments Model for Missing Data: The FLIM Package. R Journal, 6(2).
Kristensen, P., & Aalen, O. O. (2013). Understanding mechanisms: opening the" black box" in observational studies. Scandinavian journal of work, environment & health, 39(2), 121-124.
Valberg, M., Grotmol, T., Tretli, S., Veierød, M. B., Moger, T. A., & Aalen, O. O. (2013). A hierarchical frailty model for familial testicular germ-cell tumors. American journal of epidemiology, 179(4), 499-506.
Aalen, O. O. (2012). Armitage lecture 2010: understanding treatment effects: the value of integrating longitudinal data and survival analysis. Statistics in medicine, 31(18), 1903-1917.
Aalen, O. O., Røysland, K., Gran, J. M., & Ledergerber, B. (2012). Causality, mediation and time: a dynamic viewpoint. Journal of the Royal Statistical Society: Series A (Statistics in Society), 175(4), 831-861.
Valberg, M., Grotmol, T., Tretli, S., Veierød, M. B., Devesa, S. S., & Aalen, O. O. (2012). Frailty modeling of age–incidence curves of osteosarcoma and Ewing sarcoma among individuals younger than 40 years. Statistics in medicine, 31(28), 3731-3747.
Røysland, K. (2012). Counterfactual analyses with graphical models based on local independence. The Annals of Statistics, 40(4), 2162-2194.
Blasio, B. F. D., Seierstad, T. G., & Aalen, O. O. (2011). Frailty effects in networks: comparison and identification of individual heterogeneity versus preferential attachment in evolving networks. Journal of the Royal Statistical Society: Series C (Applied Statistics), 60(2), 239-259.
Røysland, K. (2011). A martingale approach to continuous-time marginal structural models. Bernoulli, 17(3), 895-915.
Røysland, K., Gran, J. M., Ledergerber, B., von Wyl, V., Young, J., & Aalen, O. O. (2011). Analyzing direct and indirect effects of treatment using dynamic path analysis applied to data from the Swiss HIV Cohort Study. Statistics in medicine, 30(24), 2947-2958.
Aalen, O. O., & Gunnes, N. (2010). A dynamic approach for reconstructing missing longitudinal data using the linear increments model. Biostatistics, 11(3), 453-472.
Aalen, O. O. (2010). Understanding disease processes. Statistics in medicine, 29(11), 1159-1160.
Aalen, O. O. (2010). Survival analysis, longitudinal analysis and causal inference. Lifetime data analysis, 16(1), 1.
Gjessing, H. K., Røysland, K., Pena, E. A., & Aalen, O. O. (2010). Recurrent events and the exploding Cox model. Lifetime data analysis, 16(4), 525-546.
Gran, J. M., Røysland, K., Wolbers, M., Didelez, V., Sterne, J. A., Ledergerber, B., ... & Aalen, O. O. (2010). A sequential Cox approach for estimating the causal effect of treatment in the presence of time‐dependent confounding applied to data from the Swiss HIV Cohort Study. Statistics in medicine, 29(26), 2757-2768.

Published Feb. 21, 2017 4:56 PM - Last modified Aug. 5, 2025 10:05 AM