Table 1.

Patient characteristics.

Characteristicn
Sex
    Male169
    Female119
Age, years
    ≤4911
    50–5955
    60–69109
    70–7992
    80–8920
    Unknown1
Stage
    I64
    IA45
    IB18
    IA or IB1
    II19
    IIA13
    IIB6
    III53
    IIIA27
    IIIB26
    IV146
    Undetermined6
Histology
    Adenocarcinoma274
    Squamous cell carcinoma7
    Adenosquamous cell carcinoma2
    Other5
Type of treatment
    Gefitinib46
    Gefitinib and pemetrexed2
    Erlotinib15
Effect of EGFR-TKI
    Complete response3
    Mutation positive in plasma1
    Partial response37
    Mutation positive in plasma24
    Stable disease12
    Mutation positive in plasma10
    Progressive disease3
    Mutation positive in plasma2
    Not evaluable6
    Mutation positive in plasma4
    Unknown2
    Mutation positive in plasma2