Fig. 5From: Prognostic value of cervical nodal necrosis on staging imaging of nasopharyngeal carcinoma in era of intensity-modulated radiotherapy: a systematic review and meta-analysisSensitivity analysis showing the association between the adjusted hazard ratios (HRs) of CNN presence in any nodal group and the distant metastases-free survival (a), disease-free survival (b) and overall survival (c)Back to article page