Table 1 Patient characteristics at baseline

Median age (range), years

70 (44–91)

Gender: male / female

170 / 35

ECOG PS score: 0 / 1 / 2 / 3 / 4

49 / 120 / 29 / 6 / 1

Stage: II / III / IV recurrence

3 / 34 / 130 / 38

Histological types: ADC / SCC / NSCLC-NOS / other

123 / 54 / 22 / 6^a

EGFR mutation: positive / negative / unknown

6^b / 171 / 28

Smoking history: ever / never / unknown

182 / 19 / 4

PD-L1: 50–89% / 90–100%

138 / 67

Steroid use: yes / no

13 / 192

Best response: CR / PR / SD / PD

3 / 105 / 45 / 52