Table 1 Clinicopathologic characteristics of the 672 patients with metastatic nasopharyngeal carcinoma (NPC)

Total

Gender

Male

Reference

Female

1.05 (0.83, 1.32)

Age (years)

<46

Reference

≥46

1.16 (0.96, 1.39)

T stage*

T1-2

Reference

T3-4

1.00 (0.83, 1.20)

N stage*

N0-1

Reference

N2-3

1.42 (1.18, 1.72)

Metastasis at presentation

Absent

Reference

Present

0.98 (0.81, 1.18)

Number of metastatic lesions

1

Reference

≥2

2.06 (1.54, 2.77)

Bone metastasis

Absent

Reference

Present

1.02 (0.85, 1.22)

Liver metastasis

Absent

Reference

Present

1.62 (1.34, 1,95)

Lung metastasis

Absent

Reference

Present

0.98 (0.81, 1.19)

Extraregional lymph node metastasis

Absent

Reference

Present

1.22 (0.99, 1.49)

EBV VCA/IgA

<1:80

Reference

1:80–1:320

1.15 (0.84, 1.56)

≥1:640

1.17 (0.85, 1.63)

EBV EA/IgA

<1:10

Reference

1:10–1:20

0.97 (0.74, 1.27)

≥1:40

0.91 (0.71, 1.16)

Lymphocyte count (× 10⁹/L)

<1.390

Reference

≥1.390

0.75 (0.63, 0.90)

Monocyte count (× 10⁹/L)

<0.665

Reference

≥0.665

2.17 (1.80,2.62)

LMR

<2.475

Reference

≥2.475

0.45 (0.37, 0.54)