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Statistical summary of IHC staining results according to tumor subtypes and stages
| Parameter | No. of positive tissues (%) |
|---|---|
| Tumor subtype | |
| Squamous cell carcinoma | 9/49 (18.4) |
| Adenocarcinoma | 3/18 (16.7) |
| Bronchioloalveolar | 7/11 (63.6) |
| Adenosquamous carcinoma | 5/9 (55.6) |
| Undifferentiated carcinoma | 3/5 (60) |
| Small-cell carcinoma | 1/3 (33.3) |
| Tumor stage | |
| I-II | 20/74 (27) |
| III | 6/17 (35) |
| IV | 2/5 (40) |
| Patient age (yr) | |
| <50 | 3/19 (15.8) |
| 50–60 | 11/50 (22) |
| 60–70 | 8/20 (40) |
| >70 | 6/13 (46.2) |
