A new scoring system to evaluate adjuvant chemotherapy for patients with T2N0M0 gastric cancer after D2 gastrectomy

Table 4 Five-year survival rates of different groups

	Group	n	5-year survival rate	Log rank test
All patients				P = 0.676
	Adjuvant chemotherapy	63	96%
	Postoperative observation	262	90%
Risk score				P < 0.001
	Score 0 group	98	92%
	Score 1 group	152	95%
	Score 2 group	69	80%
	Score 3 group	6	50%
Score 0 group				P = 0.825
	Adjuvant chemotherapy	13	92%
	Postoperative observation	85	92%
Score 1 group				P = 0.308
	Adjuvant chemotherapy	22	92%
	Postoperative observation	130	96%
Score 2-3 group				P = 0.021
	Adjuvant chemotherapy	28	95%
	Postoperative observation	47	61%