Table 3. Cox proportional hazards model results (AIC: 146.39).

Variables	Estimated coefficient	SE	P -value	HR	95% CI
Type of treatment
≤Two treatmentsaa	1.00
Surgery & chemotherapy & hormone therapy	0.30	0.69	0.661	1.35	0.35	5.25
Surgery & chemotherapy & radiation therapy & hormone therapy	-0.90	0.61	0.132	0.40	0.12	1.32
Stage
2	1.00
3	3.28	0.81	0.001	26.77	5.60	127.80
4	4.97	0.88	0.001	144.94	25.70	816.24

^a The patient received two treatments of three treatments contain Surgical, Chemotherapy and Hermione therapy.