Table 1.
Characteristics of 579 Patients with NSCLC
| Characteristic | No. of Patients (%) | ||||||
|---|---|---|---|---|---|---|---|
| Total | Aged ≤40 Years | Aged >40 Years | P | Smoking | Nonsmoking | P | |
| No. of patients | 579 | 36 | 543 | 225 | 354 | ||
| Age: Median (range), y | 58 (23–89) | 38 (23–40) | 59 (40–89) | 58 (23–89) | 58 (25–84) | ||
| Sex | |||||||
| Male | 333 (57.5) | 18 (50.0) | 315 (58.0) | 0.34 | 223 (99.1) | 110 (31.0) | <0.001a |
| Female | 246 (42.5) | 18 (50.0) | 228 (42.0) | 2 (0.9) | 244 (69.0) | ||
| Histology | |||||||
| Adenocarcinoma | 524 (90.5) | 36 (100.0) | 488 (90.0) | 0.08 | 193 (85.7) | 331 (93.5) | |
| Squamous cell carcinoma | 46 (8.0) | 0 (0) | 46 (8.4) | 26 (11.5) | 20 (5.6) | <0.05a | |
| Large cell lung carcinoma | 1 (0.2) | 0 (0) | 1 (0.2) | 1 (0.5) | 0 (0.0) | ||
| NSCLC | 8 (1.3) | 0 (0) | 8 (1.4) | 5 (2.3) | 3 | ||
| Stage | |||||||
| I | 84 (14.5) | 3 (8.3) | 79 (14.5) | 0.02a | 19 (8.4) | 58 (16.3) | 0.58 |
| II | 19 (3.3) | 0 (0) | 19 (3.5) | 6 (2.6) | 13 (3.8) | ||
| III | 115 (19.9) | 4 (11.2) | 106 (19.5) | 52 (23.2) | 58 (16.3) | ||
| IV | 361 (62.3) | 29 (80.5) | 339 (62.5) | 148 (65.8) | 225 (63.6) | ||
| Family history of malignancy | |||||||
| Yes | 28 (4.8) | 2 (5.5) | 26 (4.8) | 0.84 | 6 (2.6) | 22 (6.2) | 0.05 |
| No | 551 (95.2) | 34 (94.5) | 517 (95.2) | 219 (97.4) | 332 (93.8) | ||
| Xuanwei origin | |||||||
| Yes | 119 (20.6) | 3 (8.3) | 116 (21.4) | 0.06 | 53 (23.5) | 66 (18.6) | 0.15 |
| No | 460 (79.4) | 33 (91.7) | 427 (78.6) | 172 (76.5) | 288 (81.4) | ||
Note: aThis p value indicates a statistically significant difference.