Table 4. Relationship between survival and chemotherapy.

Stage		Chemotherapy group	Chemo-refusing group	HR	95% CI	P value
II B	5-year DFS (%)	83	77	1.58	0.68–3.62	0.28
	5-year OS (%)	63	57	1.29	0.76–2.18	0.35
III	5-year DFS (%)	92	86	2.41	0.74–7.94	0.15
	5-year OS (%)	68	50	2.05	1.12–3.77	0.02
IV	5-year OS (%)	56	27	1.35	0.74–2.43	0.32