Fig. 1From: The prognostic value of preoperative prognostic nutritional index in patients with hypopharyngeal squamous cell carcinoma: a retrospective studyKaplan–Meier survival curves of overall survival (a), progression-free survival (b), locoregional recurrence-free survival (c) and distant metastasis-free survival (d) according to preoperative prognostic nutritional index (PNI). Log-rank test, P < 0.05Back to article page