Table 2.
Demographic and clinical characteristics of patients on IA and PM groups
| Variable | IA (n = 391) | PM (n = 232) | p value |
|---|---|---|---|
| Age, n (%) | < 0.01* | ||
| ≤ 60 | 168 (43.0) | 145 (62.5) | |
| > 60 | 223 (57.0) | 87 (37.5) | |
| Gender, n (%) | < 0.01* | ||
| Male | 155 (39.6) | 63 (27.2) | |
| Female | 236 (60.4) | 169 (72.8) | |
| Smoking, n (%) | 0.089 | ||
| Yes | 67 (17.1) | 28 (12.1) | |
| No | 324 (82.9) | 204 (87.9) | |
| Family history, n (%) | 0.06 | ||
| Yes | 18 (4.6) | 4 (1.7) | |
| No | 373 (95.4) | 228 (98.3) | |
| Diameter (cm), n (%) | < 0.01* | ||
| ≤ 1 | 57 (14.6) | 181 (78.0) | |
| 1.1–2.0 | 211 (54.0) | 34 (14.7) | |
| 2.1–3.0 | 123 (31.5) | 17 (7.3) | |
| Location, n (%) | 0.27 | ||
| LUL | 89 (22.8) | 46 (19.8) | |
| LLL | 57 (14.6) | 42 (18.1) | |
| RUL | 139 (35.5) | 90 (38.8) | |
| RML | 27 (6.9) | 20 (8.6) | |
| RLL | 79 (20.2) | 34 (14.7) | |
| Nodule type, n (%) | < 0.01* | ||
| pGGNs | 62 (15.9) | 148 (63.8) | |
| PSN | 217 (55.5) | 83 (35.8) | |
| Solid | 112 (28.6) | 1 (0.4) | |
| Volume (mm3), n (%) | < 0.01* | ||
| < 500 | 47 (12.0) | 158 (68.1) | |
| 500–1000 | 81 (20.7) | 42 (18.1) | |
| > 1000 | 263 (67.3) | 32 (13.8) | |
| Surgical type, n (%) | < 0.01* | ||
| Lobectomy | 377 (96.4) | 86 (37.1) | |
| Limited resection | 14 (3.6) | 146 (62.9) |
IA, invasive adenocarcinoma; PM, preinvasive lesions/minimally invasive adenocarcinomas; LUL, left upper lobe; LLL, left lower lobe; RUL, right upper lobe; RML, right middle lobe; RLL, right lower lobe; pGGN, pure ground-glass nodule; PSN, part-solid nodule. *p < 0.05. p values calculated using Pearson’s chi-squared test