Table 4.
Characteristics of patients with EGFR 19 exon deletion
| Characteristics | I+C (group A1, n=31) | I (group B1, n=42) | C (group C1, n=29) | Total (n=102) |
|---|---|---|---|---|
| Median age (years) | 62.1 | 61.7 | 59.7 | 61.2 |
| Sex | ||||
| Male | 35.5% (n=11) | 38.1% (n=16) | 37.9% (n=11) | 37.3% (n=38) |
| Female | 64.5% (n=20) | 61.9% (n=26) | 62.1% (n=18) | 62.7% (n=64) |
| Smoking history (%) | ||||
| Nonsmoker | 58.1% (n=18) | 66.7% (n=28) | 65.5% (n=19) | 63.7% (n=65) |
| Smoker | 41.9% (n=13) | 33.3% (n=14) | 34.5% (n=10) | 36.3% (n=37) |
| ECOG performance status score | ||||
| 0–1 | 100% (n=31) | 95.2% (n=40) | 100% (n=29) | 93.2% |
| 2 | 0% (n=0) | 4.8% (n=2) | 0% (n=0) | 6.8% |
Abbreviations: C, chemotherapy; ECOG, Eastern Cooperative Oncology Group; EGFR, epidermal growth factor receptor; I, icotinib; I+C, icotinib+chemotherapy.