Fig. 1From: Natural history and outcome in chinese patients with gastroenteropancreatic neuroendocrine tumours: - a 17-year retrospective analysisOverall survival. a By age - green line indicates age ≥ 55 years old and blue line indicates age < 55 years old (p = 0.006). b By tumour grade (WHO classification) - green line indicates WHO grade 2 or grade 3 tumours and blue line indicates grade 1 tumours (p = 0.001). c By metastasis on presentation - green line indicates metastasis on presentation and blue line indicates no metastasis on presentation (p < 0.001)Back to article page