Bayesian Cure Rate Modeling of Local Tumor Control: Evaluation in Stereotactic Body Radiation Therapy for Pulmonary Metastases
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Bayesian Cure Rate Modeling of Local Tumor Control: Evaluation in Stereotactic Body Radiation Therapy for Pulmonary Metastases. / Klement, Rainer J; Allgäuer, Michael; Andratschke, Nicolaus; Blanck, Oliver; Boda-Heggemann, Judit; Dieckmann, Karin; Duma, Marciana; Ernst, Iris; Flentje, Michael; Ganswindt, Ute; Hass, Peter; Henkenberens, Christoph; Imhoff, Detlef; Kahl, Henning K; Krempien, Robert; Lohaus, Fabian; Nestle, Ursula; Nevinny-Stickel, Meinhard; Petersen, Cordula; Schmitt, Vanessa; Semrau, Sabine; Sterzing, Florian; Streblow, Jan; Wendt, Thomas G; Wittig, Andrea; Guckenberger, Matthias.
In: INT J RADIAT ONCOL, Vol. 94, No. 4, 15.03.2016, p. 841-9.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - Bayesian Cure Rate Modeling of Local Tumor Control: Evaluation in Stereotactic Body Radiation Therapy for Pulmonary Metastases
AU - Klement, Rainer J
AU - Allgäuer, Michael
AU - Andratschke, Nicolaus
AU - Blanck, Oliver
AU - Boda-Heggemann, Judit
AU - Dieckmann, Karin
AU - Duma, Marciana
AU - Ernst, Iris
AU - Flentje, Michael
AU - Ganswindt, Ute
AU - Hass, Peter
AU - Henkenberens, Christoph
AU - Imhoff, Detlef
AU - Kahl, Henning K
AU - Krempien, Robert
AU - Lohaus, Fabian
AU - Nestle, Ursula
AU - Nevinny-Stickel, Meinhard
AU - Petersen, Cordula
AU - Schmitt, Vanessa
AU - Semrau, Sabine
AU - Sterzing, Florian
AU - Streblow, Jan
AU - Wendt, Thomas G
AU - Wittig, Andrea
AU - Guckenberger, Matthias
N1 - Copyright © 2016 Elsevier Inc. All rights reserved.
PY - 2016/3/15
Y1 - 2016/3/15
N2 - PURPOSE: Most radiobiological models for prediction of tumor control probability (TCP) do not account for the fact that many events could remain unobserved because of censoring. We therefore evaluated a set of TCP models that take into account this censoring.METHODS AND MATERIALS: We applied 2 fundamental Bayesian cure rate models to a sample of 770 pulmonary metastasis treated with stereotactic body radiation therapy at German, Austrian, and Swiss institutions: (1) the model developed by Chen, Ibrahim and Sinha (the CIS99 model); and (2) a mixture model similar to the classic model of Berkson and Gage (the BG model). In the CIS99 model the number of clonogens surviving the radiation treatment follows a Poisson distribution, whereas in the BG model only 1 dominant recurrence-competent tissue mass may remain. The dose delivered to the isocenter, tumor size and location, sex, age, and pretreatment chemotherapy were used as covariates for regression.RESULTS: Mean follow-up time was 15.5 months (range: 0.1-125). Tumor recurrence occurred in 11.6% of the metastases. Delivered dose, female sex, peripheral tumor location and having received no chemotherapy before RT were associated with higher TCP in all models. Parameter estimates of the CIS99 were consistent with the classical Cox proportional hazards model. The dose required to achieve 90% tumor control after 15.5 months was 146 (range: 114-188) Gy10 in the CIS99 and 133 (range: 101-164) Gy10 in the BG model; however, the BG model predicted lower tumor control at long (≳20 months) follow-up times and gave a suboptimal fit to the data compared to the CIS99 model.CONCLUSIONS: Biologically motivated cure rate models allow adding the time component into TCP modeling without being restricted to the follow-up period which is the case for the Cox model. In practice, application of such models to the clinical setting could allow for adaption of treatment doses depending on whether local control should be achieved in the short or longer term.
AB - PURPOSE: Most radiobiological models for prediction of tumor control probability (TCP) do not account for the fact that many events could remain unobserved because of censoring. We therefore evaluated a set of TCP models that take into account this censoring.METHODS AND MATERIALS: We applied 2 fundamental Bayesian cure rate models to a sample of 770 pulmonary metastasis treated with stereotactic body radiation therapy at German, Austrian, and Swiss institutions: (1) the model developed by Chen, Ibrahim and Sinha (the CIS99 model); and (2) a mixture model similar to the classic model of Berkson and Gage (the BG model). In the CIS99 model the number of clonogens surviving the radiation treatment follows a Poisson distribution, whereas in the BG model only 1 dominant recurrence-competent tissue mass may remain. The dose delivered to the isocenter, tumor size and location, sex, age, and pretreatment chemotherapy were used as covariates for regression.RESULTS: Mean follow-up time was 15.5 months (range: 0.1-125). Tumor recurrence occurred in 11.6% of the metastases. Delivered dose, female sex, peripheral tumor location and having received no chemotherapy before RT were associated with higher TCP in all models. Parameter estimates of the CIS99 were consistent with the classical Cox proportional hazards model. The dose required to achieve 90% tumor control after 15.5 months was 146 (range: 114-188) Gy10 in the CIS99 and 133 (range: 101-164) Gy10 in the BG model; however, the BG model predicted lower tumor control at long (≳20 months) follow-up times and gave a suboptimal fit to the data compared to the CIS99 model.CONCLUSIONS: Biologically motivated cure rate models allow adding the time component into TCP modeling without being restricted to the follow-up period which is the case for the Cox model. In practice, application of such models to the clinical setting could allow for adaption of treatment doses depending on whether local control should be achieved in the short or longer term.
KW - Adolescent
KW - Adult
KW - Aged
KW - Aged, 80 and over
KW - Bayes Theorem
KW - Child
KW - Databases, Factual
KW - Female
KW - Follow-Up Studies
KW - Humans
KW - Lung Neoplasms
KW - Male
KW - Middle Aged
KW - Models, Biological
KW - Models, Theoretical
KW - Neoplasm Recurrence, Local
KW - Poisson Distribution
KW - Probability
KW - Radiosurgery
KW - Radiotherapy Dosage
KW - Retrospective Studies
KW - Time Factors
KW - Young Adult
KW - Journal Article
KW - Multicenter Study
U2 - 10.1016/j.ijrobp.2015.12.004
DO - 10.1016/j.ijrobp.2015.12.004
M3 - SCORING: Journal article
C2 - 26972657
VL - 94
SP - 841
EP - 849
JO - INT J RADIAT ONCOL
JF - INT J RADIAT ONCOL
SN - 0360-3016
IS - 4
ER -