Table 2.

Univariate and multivariate Cox regression analyses of potential risk factors affecting survival and recurrence of ovarian cancer patients after surgery

Factors affecting survival	Number	Survival status		Unadjusted (univariate)		Adjusted (multivariate)
		Dead (n)	Alive (n)	HR (95% CI)	P value	HR (95% CI)	P value
1. Histology
Non-epithelial					0.10		0.49
Tumour	24	1	23	1		1
Epithelial tumour	52	9	43	5.81 (0.73–46.22)		2.22 (0.23–21.34)
2. Treatment					<0.001		0.25
Surgery	60	3	57	1		1
Chemotherapy	16	7	9	10.17 (2.62–39.4)		2.42 (0.54–10.64)
Variables affecting recurrence	N	Recurrence status		Unadjusted (univariate)		Adjusted (multivariate)
		Yes (n)	No (n)	HR (95% CI)	P value	HR (95% CI)	P value
1. Histology
Non-epithelial	24	5	19	1	0.05	1	0.15
Epithelial	52	23	29	2.7 (1.02–7.30)		2.36 (0.74–7.51)
2. Treatment
Surgery	60	16	44	1	<0.001	1	0.42
Chemotherapy	16	12	4	4.3 (2.01–9.31)		1.44 (0.60–3.48)
3. Stages
Early stage	38	3	35	1	<0.001	1	<0.001
Advanced stage	38	25	13	14.1 (4.21–47.4)		12.6(3.49–45.49)