Background: This study aimed to examine the prognostic role of Prognostic Nutritional Index (PNI) dynamics in the pre- and postoperative periods for patients with renal cell carcinoma (RCC) who undergo radical nephrectomy (RN).
Methods: The study analyzed 324 patients with RCC who underwent RN. The overall population was classified into four groups according to four types of pre- to postoperative PNI dynamics as follows: group 1 (low → low PNI), group 2 (low → high PNI), group 3 (high → low PNI), and group 4 (high → high PNI). The level of PNI was calculated using the following formula: 10 × serum albumin level (g/dL) + 0.005 × absolute lymphocyte counts in blood (/mm). The primary end point was cancer-specific survival (CSS), and the secondary end point was overall survival (OS).
Results: The patients with higher pre- and postoperative PNI (>45) had better survival outcomes than those with lower pre- and postoperative PNI (≤45). Notably, the patients in group 4 showed the best CSS and OS rates, whereas the patients in group 1 had the worst survival outcomes. Furthermore, PNI dynamics were identified as an independent predictor of CSS and OS outcomes, in addition to pre- and postoperative PNI, tumor size, and pathologic T (pT) stage. The patients with localized RCC (≤pT2) showed significant differences in both CSS and OS estimates, whereas the patients with advanced pT stage (≥pT3) demonstrated a difference only in OS outcomes, according to PNI dynamics.
Conclusions: This study is the first to provide the independent prognostic importance of dynamics of nutritional status for patients with RCC.
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