Table 1 Clinical characteristics of patients
|  | 19ins (N = 83) |
|---|---|
Age at diagnosis | |
 ≤ 56 | 39 (47.0%) |
 > 56 | 39 (47.0%) |
 Unknown | 5 (6.0%) |
Median (range) | 56 (26–81) |
Sex | |
 Female | 45 (54.2%) |
 Male | 38 (45.8%) |
Histology type | |
 LUAD | 83 (100%) |
Stage of diagnosis | |
 I–III | 18 (21.7%) |
 IV | 35 (42.2%) |
 Unknown | 30 (36.1%) |
EGFR 19ins | |
 I740_K745dup | 72 (86.7%) |
 K745_E746insVPVAIK | 11 (13.3%) |