Table 1 The EGFR mutation types among the 1025 lung cancer patients with baseline compound EGFR mutations

Dual EGFR mutations

998 (97.4%)

 Common + common

24 (2.3%)

 Common + rare

130 (12.7%)

 Common + VUSs

495 (48.2%)

 Rare + VUSs

176 (17.2%)

 Rare + rare

129 (12.6%)

 VUSs + VUSs

44 (4.3%)

> 2 EGFR mutations

27 (2.6%)

 Common + common + rare

2 (0.2%)

 Common + common + VUSs

1 (0.1%)

 Common + rare + VUSs

2 (0.2%)

 Common + rare + rare

2 (0.2%)

 Common + VUSs + VUSs

7 (0.7%)

 Rare + VUSs + VUSs

9 (0.9%)

 Rare + rare + VUSs

1 (0.1%)

 Common + common + rare + VUSs

1 (0.1%)

 Rare + VUSs + VUSs + VUSs

1 (0.1%)

 VUSs + VUSs + VUSs + VUSs

1 (0.1%)