Does stereotactic eligibility for the treatment of glioblastoma cause selection bias in randomized studies?
The purpose of this study was to evaluate the potential selection bias using stereotactic eligibility as a criteria for participation in studies of glioblastoma multiforme. Radiation Therapy Oncology Group (RTOG) 90-06 comparing 60 Gy in 30 fractions with BCNU and 72 Gy in 60 fractions with BCNU was...
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Published in | American journal of clinical oncology Vol. 27; no. 5; p. 516 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
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United States
01.10.2004
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Abstract | The purpose of this study was to evaluate the potential selection bias using stereotactic eligibility as a criteria for participation in studies of glioblastoma multiforme. Radiation Therapy Oncology Group (RTOG) 90-06 comparing 60 Gy in 30 fractions with BCNU and 72 Gy in 60 fractions with BCNU was analyzed based on eligibility criteria used to enter patients on RTOG 93-05 using a stereotactic boost for patients with glioblastoma. Five hundred nine patients with histopathologically confirmed glioblastoma multiforme were analyzed; of these, 137 met criteria for 93-05 and 372 did not. Recursive partitioning analysis (RPA) was used to evaluate for differences. The RPA distribution in stereotactic radiosurgery (SRS)-eligible and -ineligible patients was similar. The median survival for RPA class 3 SRS-eligible patients was 1.4 years and -ineligible patients 1.4 years. For RPA class 4, the median survival was 1.0 years for eligible patients and 0.9 years for ineligible patients (P = 0.0421). For class 5 patients, the median survival was 8.3 months versus 7.2 months (P = 0.09). RPA class 6 patients had a median survival of 1.7 months versus 2.7 months for ineligible patients (P = 0.199). By analyzing previously randomized patients in a study not using a stereotactic boost, there does not appear to be a survival benefit for those patients who fit the criteria for consideration of a stereotactic boost in patients with glioblastoma multiforme. |
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AbstractList | The purpose of this study was to evaluate the potential selection bias using stereotactic eligibility as a criteria for participation in studies of glioblastoma multiforme. Radiation Therapy Oncology Group (RTOG) 90-06 comparing 60 Gy in 30 fractions with BCNU and 72 Gy in 60 fractions with BCNU was analyzed based on eligibility criteria used to enter patients on RTOG 93-05 using a stereotactic boost for patients with glioblastoma. Five hundred nine patients with histopathologically confirmed glioblastoma multiforme were analyzed; of these, 137 met criteria for 93-05 and 372 did not. Recursive partitioning analysis (RPA) was used to evaluate for differences. The RPA distribution in stereotactic radiosurgery (SRS)-eligible and -ineligible patients was similar. The median survival for RPA class 3 SRS-eligible patients was 1.4 years and -ineligible patients 1.4 years. For RPA class 4, the median survival was 1.0 years for eligible patients and 0.9 years for ineligible patients (P = 0.0421). For class 5 patients, the median survival was 8.3 months versus 7.2 months (P = 0.09). RPA class 6 patients had a median survival of 1.7 months versus 2.7 months for ineligible patients (P = 0.199). By analyzing previously randomized patients in a study not using a stereotactic boost, there does not appear to be a survival benefit for those patients who fit the criteria for consideration of a stereotactic boost in patients with glioblastoma multiforme. |
Author | Scott, Charles B Lustig, Robert A Curran, Walter J |
Author_xml | – sequence: 1 givenname: Robert A surname: Lustig fullname: Lustig, Robert A email: lustig@xrt.upenn.edu organization: Department of Radiation Oncology, Hospital of the University of Pennsylvania, Philadelphia, PA, USA. lustig@xrt.upenn.edu – sequence: 2 givenname: Charles B surname: Scott fullname: Scott, Charles B – sequence: 3 givenname: Walter J surname: Curran fullname: Curran, Walter J |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/15596923$$D View this record in MEDLINE/PubMed |
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SubjectTerms | Adult Aged Antineoplastic Agents, Alkylating - therapeutic use Carmustine - therapeutic use Central Nervous System Neoplasms - classification Central Nervous System Neoplasms - drug therapy Central Nervous System Neoplasms - radiotherapy Central Nervous System Neoplasms - surgery Combined Modality Therapy Female Glioblastoma - classification Glioblastoma - drug therapy Glioblastoma - radiotherapy Glioblastoma - surgery Humans Male Middle Aged Patient Selection Prognosis Radiosurgery Randomized Controlled Trials as Topic Selection Bias Survival Analysis |
Title | Does stereotactic eligibility for the treatment of glioblastoma cause selection bias in randomized studies? |
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