Publications

Publications

2016 Lok JJ. Mimicking counterfactual outcomes to estimate causal effects. Accepted by The Annals Of Statistics.

2016 Lok JJ. Defining and estimating causal direct and indirect effects when setting the mediator to specific values is not feasible. Provisionally accepted by Statistics In Medicine.

2016 Lok JJ and MD Hughes. Evaluating predictors of competing risk outcomes when censoring depends on time-dependent covariates, with application to safety and efficacy of HIV treatment. Accepted by Statistics In Medicine.

2016 Schnitzer ME, JJ Lok, and RJ Bosch. Double robust and efficient estimation of a prognostic model for events in the presence of informative censoring. Biostatistics 2016; 17(1): 165-177.

2015 Schnitzer ME, JJ Lok, and S Gruber. Variable selection for confounder control, flexible modeling and Collaborative Targeted Minimum Loss-based estimation in causal inference. Accepted by The International Journal of Biostatistics.

2014 Kiragga AN, JJ Lok, BS Musick, RJ Bosch, A Mwangi, KK Wools-Kaloustian, CT Yiannoutsos, for the East Africa IeDEA Regional Consortium. CD4 trajectory adjusting for dropout among HIV-positive patients receiving combination antiretroviral therapy in an East African HIV care centre. Jounal of the International AIDS Society 17(1): 18957.

2013 Lok JJ, Hunt PW, Collier AC, Benson CA, Witt MD, Luque AE, Deeks SG, Bosch RJ. The impact of age on the prognostic capacity of CD8+ T-cell activation during suppressive antiretroviral therapy. AIDS 27(13): 2101-2110.

2013 Smurzynski M, Wu K, Schouten JT, Lok JJ, Bosch RJ, Taiwo B, Johnson VA, Collier AC. Factors Associated with Remaining on Initial Randomized Efavirenz-containing Regimens in the AIDS Clinical Trials Group. AIDS 27(12): 1887-1897.

2012 Lok JJ and V DeGruttola. Impact of Time to Start Treatment Following Infection with Application to Initiating HAART in HIV-Positive Patients. Biometrics 68 (3), 745-754.

2011 Ribaudo HJ, Benson CA, Zheng Y, Koletar SL, Collier AC, Lok JJ, Smurzynski M, Bosch RJ, Bastow B, Schouten JT, for the ACTG A5001/ALLRT Protocol Team. No Risk of Myocardial Infarction Associated with Initial Antiretroviral Treatment Containing Abacavir: Short and Long-Term Results from ACTG A5001/ALLRT. Clinical Infectious Diseases 52 (7): 929-940. PMCID: PMC3062545.

2010 Lok JJ, Bosch RJ, Benson CA, Collier AC, Robbins GK, Shafer RW, Hughes MD; ALLRT team. Long-term increase in CD4+ T-cell counts during combination antiretroviral therapy for HIV-1 infection. AIDS 24 (12):1867-76. PMCID: PMC3018341.

2008 Lok, J.J. Statistical modeling of causal effects in continuous time. Annals of Statistics 36 (3), 1464—1507.

2007 Lok, J.J. Structural nested models and standard software: a mathematical foundation through partial likelihood. Scandinavian Journal of Statistics 34 (1), 186–206.

2004 Lok, J.J. , A.W. van der Vaart, R.D. Gill, A.W. van der Vaart, J.M. Robins. Estimating the causal effect of a time-varying treatment on time-to-event using structural nested failure time models. Statistica Neerlandica 58 (3), 271–295.

2004 Van der Linden, Y.M., P.D.S. Dijkstra, H.M. Kroon, J.J. Lok , E.M. Noordijk, J.W.H. Leer, C.A.M. Marijnen. Comparative analysis of risk factors for pathological fracture with femoral metastases – Results based on a randomised trial of radiotherapy. Journal of Bone and Joint Surgery (Br) 86B (4), 566–573.

2004 Van der Linden, Y.M., J.J. Lok , E. Steenland, H. Martijn, H. van Houwelingen, C.A.M. Marijnen, J.W.H. Leer, Dutch Bone Metastasis Study Group. Single fraction radiotherapy is efficacious: A further analysis of the dutch bone metastasis study controlling for the influence of retreatment. International Journal of Radiation Oncology Biology Physics 59 (2), 528–537.

2004 Van der Peijl, I.D., T.P.M. Vlieland, M.I.M. Versteegh, J.J. Lok , M. Munneke, R.A.E. Dion. Exercise therapy after coronary artery bypass graft surgery: A randomized comparison of a high and low frequency exercise therapy program. Annals of Thoracic Surgery 77 (5), 1535–1541.

2003 Van der Linden, Y.M., H.M. Kroon, S.P.D.S. Dijkstra, J.J. Lok , E.M. Noordijk, J.W.H. Leer, C.A.M. Marijnen, Dutch Bone Metastasis Study Group. Simple radiographic parameter predicts fracturing in metastatic femoral bone lesions: results from a randomised trial. Radiotherapy and Oncology 69 (1), 21–31.

1998 Hettiarachi, R.J.K., J.J. Lok , M.H. Prins, H.R. Buller, P. Prandoni. Undiagnosed malignancy in patients with deep vein thrombosis — Incidence, risk indicators, and diagnosis. Cancer 83 (1), 180–185.

1996 Mol, B.W.J., J.J. Lok , W. Voorn, E. Pajkrt, J. van Lith, J. van der Meulen. The diagnostic value of the triple test in the diagnosis of Down’s syndrome. Early human development 45: Suppl S, S55–S58.