Table 1.

Baseline characteristics of the three groups

Characteristic	First‐line	Second‐line	Third‐line
Age
< 65	74	149	41
≥ 65	96	71	26
Gender
Male	71	94	44
Female	99	126	23
Adenocarcinoma
116	181	41
Non‐adenocarcinoma
54	39	26
Stage
IIIa	5	2	2
IIIb	18	24	4
IVa	75	65	12
IVb	70	124	49
KPS	70 (30–100)	70 (30–100)	70 (10–100)

KPS, Karnofsky performance status.