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Table 6 The prognostic factors for overall survival (OS) for the patients with postradiation nasopharyngeal necrosis with negative pathology at the time of surgery

From: A curative-intent endoscopic surgery for postradiation nasopharyngeal necrosis in patients with nasopharyngeal carcinoma

Clinical characteristic 2-year OS rate (%) P-value
Gender
 Female 100  
 Male 84.9 0.613
Age (years)
 < 51  96  
 ≥ 51 81.6 0.295
Cycles of radiotherapy
 One 86.5  
 Two 93.3 1.000
Necrosis-free interval
 Acute necrosis 91.7  
 Chronic necrosis 87.7 0.443
Carotid artery exposure
 Yes 75  
 No 96.8 0.219
Osteoradionecrosis
 Yes 93.9  
 No 73.8 0.374
Status of the NSFF flap
 Survived 90.1  
 Necrotized 81.8 0.043
All patients 88.4  
  1. NSFF posterior pedicle nasal septum, and floor mucoperiosteum flap