Table 5 Univariate and multivariate predictors of disease-free survival (DFS)

Univariate analysis

 age

>60

≤60

0.845

0.425 to1.680

0.632

 sex

male

female

2.133

0.954 to4.769

0.065

 histological type

squamous

nonsquamous

2.191

1.088 to4.409

0.028

 induction regimen

gemcitabine

paclitaxel

0.466

0.227 to0.957

0.038

 T size before chemotherapy

>5cm

≤5cm

0.645

0.289 to1.440

0.285

 cN2

(+)

(-)

0.186

0.073 to0.474

0.0004

 clinical response

CR/PR

SD/PD

0.654

0.329 to1.301

0.226

 type of resection

lobectomy

pneumonectomy

1.403

0.576 to3.419

0.456

 T size after chemotherapy

>3cm

≤3cm

0.561

0.245 to 1.287

0.173

 pN status

N2

N0/N1

1.249

0.833 to1.873

0.283

 pN status

N0

N1/N2

1.647

0.804 to3.373

0.172

Multivariate analysis

 cN2

(+)

(-)

0.179

0.060 to0.531

0.002

 clinical response

CR/PR

SD/PD

0.295

0.114 to0.766

0.012