Table 2 Univariable and Multivariable Cox model of prognostic factors for recurrence-free survival and overall survival.

Age (per 1-year increase)

1.016

0.972–1.063

0.476

1.031

0.981–1.083

0.229

Sex, female (vs male)

0.791

0.307–2.037

0.791

0.777

0.272–2.218

0.637

Smoking status, current smoker (vs never smoker)

1.049

0.543–2.027

0.887

1.058

0.526–2.129

0.874

Pathologic stage IB (vs IA)

0.940

0.488–1.814

0.855

1.040

0.518–2.089

0.911

Mode of lung resection, sub-lobar resection (vs lobectomy)

1.967

0.936–4.134

0.074

1.456

0.622–3.405

0.386

Adjuvant chemotherapy, performed

(vs not performed)

0.397

0.121–1.299

0.127

0.450

0.137–1.483

0.189

PD-L1(-): TPS = 0

0.237

0.083–0.674

0.007

0.239

0.082–0.693

0.008

0.260

0.091–0.745

0.012

0.276

0.094–0.808

0.019

PD-L1(-): TPS, 0–4

0.358

0.155–0.827

0.016

0.365

0.154–0.855

0.022

0.401

0.171–0.940

0.036

0.426

0.178–0.969

0.045

PD-L1(-): TPS, 0–9

0.396

0.179–0.878

0.023

0.392

0.173–0.888

0.025

0.378

0.161–0.883

0.025

0.390

0.164–0.928

0.033

PD-L1(-): TPS, 0–49

0.430

0.206–0.899

0.025

0.437

0.206–0.929

0.031

0.349

0.156–0.784

0.011

0.359

0.157–0.821

0.015