Table 4 Univariable analyses and multivariable logistic regression analyses for the success of PTC culture in LM patients who underwent PTNB

Gender

 Male

0.267

0.053–1.331

0.107

 Female

1

Age(y)

 ≥65

0.130

0.016–1.081

0.059

 <65

1

ECOG PS

 <2

1

 ≥2

0.333

0.081–1.371

0.128

Extrapulmonary metastases

0.333

0.081–1.371

0.128

Previous systemic treatments

0.231

0.044–1.209

0.083

Tumor diameter

 <3

1

 3–6

0.905

0.094–8.716

0.931

 ≥6

0.314

0.030–3.285

0.334

Diameter of biopsy instruments

 16 G

1

 18 G

1.240

0.356–0.432

0.736

Intrapulmonary tumor number

 <2

1

 ≥2

0.600

0.105–3.413

0.565

Location

 Lower or middle lobe

1

 Upper lobe

0.413

0.101–1.691

0.219

Emphysema

0.150

0.030–0.749

0.021

Necrotic area over half of the tumor

0.077

0.017–0.352

0.001