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A comparison of prognostic classification systems for differentiated thyroid carcinoma

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Summary Objective 

To identify and compare prognostic classification systems based on basic tumour characteristics that were developed and/or validated for differentiated thyroid carcinoma (DTC). Design 

Retrospective chart study. Methods 

Literature was studied using PubMed. Fifteen different prognostic classification systems were identified, of which seven were developed or validated for DTC patients and were based on basic tumour characteristics. These systems were applied to 1225 DTC patients who were treated in our hospital between 1978 and 2002. Results 

Log-rank analysis of Kaplan–Meier cancer-specific survival curves showed that the curve of the Tumor, Lymph-Node, Metastasis (TNM) system had the greatest discriminatory power (log-rank test, log P = −84·9). Cox-regression analysis showed that the TNM system was the most powerful determinant of cancer-specific survival curves. Proportion of variance explained (PVE) analysis showed that the TNM system had the highest PVE. Conclusion 

Of the prognostic classification systems analysed in this study, the TNM system performs best in all the three analyses, and is therefore the most suitable for predicting outcome in DTC-patients.
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Document Type: Research Article

Affiliations: 1: Department of Nuclear Medicine 2: Comprehensive Cancer Center, University of Würzburg, Wurzburg, Germany 3: Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands

Publication date: June 1, 2010

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