Fig. 2From: Long-term outcomes of a phase II randomized controlled trial comparing intensity-modulated radiotherapy with or without weekly cisplatin for the treatment of locally recurrent nasopharyngeal carcinomaKaplan–Meier curves of overall survival in distinct subgroups of NPC patients treated with CCRT or RT. The results show that CCRT significantly improved the 5-year overall survival rate for patients with a rT3–4 category disease (33.0% vs. 13.2%, P = 0.009), b stages III–IV NPC (34.3% vs. 13.2%, P = 0.006), c recurrence interval >30 months (49.0% vs. 20.6%, P = 0.017), and d tumor volume >26 cm3 (37.6% vs. 0%, P = 0.006) as compared with RTBack to article page