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  • Multi-Institutional Validation of a Pre-Operative Scoring System which Predicts Survival for Patients with Glioblastoma

    Final Number:
    1105

    Authors:
    Kaisorn Chaichana MD; Lola Blackwell Chambless MD; Gordon Li MD; Griffith R. Harsh MD; Reid C. Thompson MD; Michael Lim MD; Alfredo Quinones-Hinojosa MD

    Study Design:
    Clinical Trial

    Subject Category:

    Meeting: Congress of Neurological Surgeons 2012 Annual Meeting

    Introduction: Glioblastoma (GB) is the most common and aggressive type of primary brain tumor in adults. Average survival is approximately one year, but individual survival is heterogeneous. Using a single institutional experience, we have previously identified pre-operative factors associated with survival and devised a prognostic scoring system based on these factors. The aims of the present study are to validate these pre-operative factors and verify the efficacy of this scoring system using a multi-institutional cohort.

    Methods: Adult patient who underwent first-time surgery for an intracranial GB at three academic tertiary-care institutions between 2007-2010 were retrospectively reviewed. Multivariate proportional hazards regression analysis was used to identify pre-operative factors associated with survival. Survival as a function of time was plotted using the Kaplan-Meier method, and survival rates were compared using Log-rank analysis.

    Results: Of the 334 patients in this study, the pre-operative factors found to be negatively associated with survival were: age>60 years (p<0.0001), KPS=80 (p=0.03), motor deficit (p=0.02), language deficit (p=0.04), and periventricular tumor location (p=0.04). Patients possessing 0-1, 2, 3, and 4-5 of these variables were assigned a pre-operative grade of 1, 2, 3, and 4, respectively. Patients with a pre-operative grade of 1, 2, 3, and 4 had a median survival of 17.9, 12.3, 10, and 7.5 months. Survival of each of these grades was statistically significant (p<0.05).

    Conclusions: This grading system, based only on pre-operative variables, may provide patients and physicians with prognostic information that may guide medical and surgical therapy before any intervention is pursued.

    Patient Care: The factors and classification system validated by this study may provide patients and physicians with prognostic information that may guide medical and surgical therapy. These can be employed before any treatments are pursued.

    Learning Objectives: By the conclusion of this session, participants should be able to: 1) Describe the importance of pre-operative factors in prognosticating survival for patients with GB, 2) Discuss, in small groups, the relevance of these factors in guiding treatment strategies, and 3) Identify clinical factors that may prognosticate survival for patients with GB.

    References: Chaichana K, Parker S, Olivi A, Quinones-Hinojosa A. A proposed classification system that projects outcomes based on preoperative variables for adult patients with glioblastoma multiforme. J Neurosurg 2010; 112(5):997-1004. Chaichana KL, Chaichana KK, Olivi A, Weingart JD, Bennett R, Brem H, Quinones-Hinojosa A. Surgical outcomes for older patients with glioblastoma multiforme: preoperative factors associated with decreased survival. Clinical article. J Neurosurg 2011; 114(3):587-594. Lacroix M, Abi-Said D, Fourney DR, Gokaslan ZL, Shi W, DeMonte F, Lang FF, McCutcheon IE, Hassenbusch SJ, Holland E, Hess K, Michael C, Miller D, Sawaya R. A multivariate analysis of 416 patients with glioblastoma multiforme: prognosis, extent of resection, and survival. J Neurosurg 2001; 95(2):190-198. Lamborn KR, Chang SM, Prados MD. Prognostic factors for survival of patients with glioblastoma: recursive partitioning analysis. Neuro Oncol 2004; 6(3):227-235.

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