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Bostel T, Akbaba S, Wollschläger D, Klodt T, Oebel L, Mayer A, Drabke S, Sprave T, Debus J, Förster R, Rief H, Rühle A, Grosu AL, Schmidberger H, Nicolay NH. Comparative Analyses of Two Established Scores to Assess the Stability of Spinal Bone Metastases Before and After Palliative Radiotherapy. Front Oncol 2021; 11:753768. [PMID: 34737961 PMCID: PMC8562722 DOI: 10.3389/fonc.2021.753768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 09/21/2021] [Indexed: 11/21/2022] Open
Abstract
Background and Purpose To compare two validated spinal instability scores regarding the stabilizing effects and skeletal-related events (SREs) of palliative radiotherapy (RT) in patients with spinal bone metastases (SBM). Materials and Methods Two hundred eighty-two osteolytic SBM of lung or breast cancer patients were analyzed for stability before and following RT based on the Spinal Instability Neoplastic Score (SINS) or the Taneichi score. Score concordance was quantified by absolute agreement and Cohen’s kappa coefficient. SREs were defined as fractures or local progression after RT. OS was quantified as the time between the start of RT and death from any cause. Results At 3 and 6 months after RT, 35 and 50% of initially unstable SBM were re-stabilized according to SINS in patients still alive. Corresponding Taneichi score-based stabilization proportions were 25 and 46%, respectively. Comparison of both stability scores showed high absolute agreement for all time-points (range 71–78%, kappa range 0.35–0.44). SRE occurred more frequently in initially unstable SBM compared to stable SBM according to SINS (14 vs. 5%), but no such association could be shown for the Taneichi-based instability criterion. Poor general condition of patients was negatively associated with SINS-measured re-stabilization after 6 months, but no predictive factor for re-stabilization could be found for the Taneichi score. Conclusions Despite the relatively high agreement between both stabilization scores, the SINS should be considered the standard for future studies on the stabilization effects of RT in SBM.
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Affiliation(s)
- Tilman Bostel
- Department of Radiation Oncology and Radiation Therapy, University Medical Center Mainz, Mainz, Germany.,German Cancer Consortium (DKTK) Partner Site Mainz, German Cancer Research Center, Heidelberg, Germany
| | - Sati Akbaba
- Department of Radiation Oncology and Radiation Therapy, University Medical Center Mainz, Mainz, Germany.,German Cancer Consortium (DKTK) Partner Site Mainz, German Cancer Research Center, Heidelberg, Germany
| | - Daniel Wollschläger
- Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center Mainz, Mainz, Germany
| | - Tristan Klodt
- Department of Radiation Oncology and Radiation Therapy, University Medical Center Mainz, Mainz, Germany.,German Cancer Consortium (DKTK) Partner Site Mainz, German Cancer Research Center, Heidelberg, Germany
| | - Laura Oebel
- Department of Radiation Oncology and Radiation Therapy, University Medical Center Mainz, Mainz, Germany.,German Cancer Consortium (DKTK) Partner Site Mainz, German Cancer Research Center, Heidelberg, Germany
| | - Arnulf Mayer
- Department of Radiation Oncology and Radiation Therapy, University Medical Center Mainz, Mainz, Germany.,German Cancer Consortium (DKTK) Partner Site Mainz, German Cancer Research Center, Heidelberg, Germany
| | - Sophia Drabke
- Department of Radiation Oncology and Radiation Therapy, University Medical Center Mainz, Mainz, Germany.,German Cancer Consortium (DKTK) Partner Site Mainz, German Cancer Research Center, Heidelberg, Germany
| | - Tanja Sprave
- Department of Radiation Oncology, University Hospital of Freiburg, Freiburg, Germany.,German Cancer Consortium (DKTK) Partner Site Freiburg, German Cancer Research Center, Heidelberg, Germany
| | - Jürgen Debus
- Department of Radiation Oncology, University Hospital of Heidelberg, Heidelberg, Germany.,German Cancer Consortium (DKTK) Partner Site Heidelberg, German Cancer Research Center, Heidelberg, Germany
| | - Robert Förster
- Institute of Radiation Oncology, Cantonal Hospital Winterthur, University of Zurich, Winterthur, Switzerland
| | - Harald Rief
- Radiation Therapy Practice Bonn-Rhein-Sieg, Bad Godesberg site, Bonn, Germany
| | - Alexander Rühle
- Department of Radiation Oncology, University Hospital of Freiburg, Freiburg, Germany.,German Cancer Consortium (DKTK) Partner Site Freiburg, German Cancer Research Center, Heidelberg, Germany
| | - Anca-Ligia Grosu
- Department of Radiation Oncology, University Hospital of Freiburg, Freiburg, Germany.,German Cancer Consortium (DKTK) Partner Site Freiburg, German Cancer Research Center, Heidelberg, Germany
| | - Heinz Schmidberger
- Department of Radiation Oncology and Radiation Therapy, University Medical Center Mainz, Mainz, Germany.,German Cancer Consortium (DKTK) Partner Site Mainz, German Cancer Research Center, Heidelberg, Germany
| | - Nils H Nicolay
- Department of Radiation Oncology, University Hospital of Freiburg, Freiburg, Germany.,German Cancer Consortium (DKTK) Partner Site Freiburg, German Cancer Research Center, Heidelberg, Germany
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