Table I.
Demographic characteristics of 176 NSCLC patients and χ2 results.
| Cases, n | ||||
|---|---|---|---|---|
|
|
||||
| Project code (variable) | EGFR mutationa | EGFR non-mutation | χ2 | P-value |
| X1 (gender) | 83 | 93 | 13.78 | 0.001 |
| Male | 34 | 64 | ||
| Female | 49 | 29 | ||
| X2 (pathological type) | 83 | 93 | 12.454 | 0.002 |
| Adenocarcinoma | 75 | 64 | ||
| Squamous cell carcinoma | 8 | 28 | ||
| Large cell carcinoma | 0 | 1 | ||
| X3 (clinical stage)b | 45 | 49 | 5.021 | 0.413 |
| Ia | 1 | 1 | ||
| Ib | 1 | 3 | ||
| IIa | 1 | 1 | ||
| IIb | 0 | 0 | ||
| IIIa | 6 | 14 | ||
| IIIb | 5 | 6 | ||
| IV | 31 | 24 | ||
| X4 (histological differentiation)b | 54 | 46 | 1.494 | 0.684 |
| Poorly-differentiated | 34 | 31 | ||
| Poorly-to moderately-differentiated | 4 | 3 | ||
| Moderately-differentiated | 12 | 11 | ||
| Well-differentiated | 4 | 1 | ||
| X5 (lymph node metastasis)b | 82 | 93 | 0.090 | 0.765 |
| Yes | 44 | 52 | ||
| No | 34 | 59 | ||
| X6 (distant metastasis)b | 82 | 93 | 8.453 | 0.004 |
| Yes | 48 | 34 | ||
| No | 34 | 59 | ||
| X7 (pleural effusion)b | 82 | 93 | 0.362 | 0.547 |
| Yes | 29 | 37 | ||
| No | 53 | 56 | ||
| X8 (family history of cancer)b | 81 | 92 | 1.746 | 0.186 |
| Yes | 7 | 14 | ||
| No | 74 | 78 | ||
| X9 (occupational exposure) | 83 | 93 | 2.109 | 0.146 |
| Yes | 4 | 10 | ||
| No | 79 | 83 | ||
| X10 (chemotherapy) | 83 | 93 | 3.992 | 0.046 |
| Yes | 44 | 63 | ||
| No | 39 | 30 | ||
| X11 (surgery)b | 77 | 89 | 0.073 | 0.787 |
| Yes | 33 | 40 | ||
| No | 44 | 49 | ||
| X12 (radiotherapy)b | 82 | 89 | 2.891 | 0.089 |
| Yes | 8 | 3 | ||
| No | 74 | 86 | ||
a
19 delL747-S75linss or delL747-S752ins is 19 delL.
b
Data not available for all patients.
NSCLC, non-small cell lung cancer.