Investigation of the Definition of De Novo Oligometastatic Nasopharyngeal Carcinoma: A Retrospective Study

Table 2

Multivariate survival analysis of 191 patients.

Factor	Cases (%)	Median OS (month)	HR (95% CI)	value
KPS
<80	50 (26.2)	11.6		0.024
≥80	141 (73.8)	31.2	1.77 (1.08–2.91)
Number of metastases
1-3	61 (31.9)	46.9	—	—
4-5	33 (17.3)	35.9	1.36 (0.76–2.45)	0.297
>5	97 (50.8)	13.0	3.99 (2.36–6.78)	<0.001
Nasopharyngeal radiotherapy
No	42 (22.0)	10.3		<0.001
Yes	149 (78.0)	27.9	0.02 (0.01–0.16)
Dose
<70 Gy	25 (16.8)	14.4		0.001
≥70 Gy	124 (83.2)	31.9	0.42 (0.25–0.71)
Cycles of first-line chemotherapy
<6	124 (64.9)	15.6		0.013
≥6	67 (35.1)	31.8	0.57 (0.36–0.89)