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To compare the correlation of T and N Integer Score (TANIS) and International Union Against Cancer (UICC) '97 stage grouping with survival rate in parotid gland carcinoma, a series of 134 patients affected by primary carcinoma of the parotid gland was considered in this retrospective study. Data set was classified according to 1997 UICC T-category and then grouped as recommended by the two systems. Data were analyzed by means of survival analyses (Kaplan-Meier and Cox algorithms). Results showed a crude survival rate of 64.9%. Univariate analysis by means of log-rank test yielded significant P values both for TANIS and UICC '97 systems (both P < 0.0001). Multivariate analysis (Cox regression adjusted for age and gender) showed a significant correlation between the two staging systems with the mortality rate. Odds ratios were 2.64 (95% CI 1.84-3.80) and 1.79 (95% CI 1.46-2.20) for UICC '97 and TANIS, respectively. In testing the superiority, UICC '97 resulted in a higher prognostic value and TANIS did not add any statistical contribution in determining survival. In conclusion, the new UICC stage grouping better defines the prognosis for cancer of the parotid gland.
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| http://dx.doi.org/10.1097/00001665-200103000-00010 | DOI Listing |
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