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Table 3 Results of multiple variable analysis (Cox proportional-hazards regression) of prognostic factors for overall survival (a) and disease-free survival (b) in patients diagnosed with esophageal cancer with pulmonary metastasis

From: Long-term survival after pulmonary metastasectomy in patients with esophageal squamous cell carcinoma with lung metastasis

(a) Overall Survival

Covariate

b

Std.Ā Error

Exp(b)

95%CI of Exp(b)

p value

Tumor grade

1.0510

0.4651

2.8604

1.1495 to 7.1189

0.0238*

Resection or Systemic Treatment

-2.5500

0.7407

0.0781

0.0183 to 0.3335

0.0006*

(b) Progression-free Survival

Covariate

b

Std.Ā Error

Exp(b)

95%CI of Exp(b)

p value

Tumor grade

1.0285

0.4461

2.7968

1.1665 to 6.7054

0.0212*

Resection or Systemic Treatment

-1.0148

0.4946

0.3625

0.1375 to 0.9555

0.0402*