Is maximum primary tumor diameter still a prognostic factor in patients with nasopharyngeal carcinoma treated using intensity-modulated radiotherapy?

Table 1 Multivariate analyses of prognostic factors in 566 patients with nasopharyngeal carcinoma

Endpoint	Variable	HR	95% CI	P-value
Overall survival	MPTD	4.300	2.233-8.279	<0.001
Failure-free survival	MPTD	3.968	2.402-6.559	<0.001
	N stage	1.802	1.111-2.923	0.017
Distant metastasis-free survival	MPTD	5.153	2.729-9.729	<0.001
	N stage	2.329	1.334-4.064	0.003
Local relapse-free survival	MPTD	3.277	1.355-7.927	0.008

Abbreviations: MPTD, maximum primary tumor diameter; 95% CI, 95% confidence interval; HR, hazard ratio.

ISSN: 1471-2407