Table 2 Nodule and operative characteristics before and after matching
| Â | Before matching | After matching | ||||||
|---|---|---|---|---|---|---|---|---|
|  | All (n = 347) | Wedge resection (n = 61) | Segmentectomy (n = 286) | p value | All (n = 98) | Wedge resection (n = 49) | Segmentectomy (n = 49) | p value |
Nodule diameter (cm), median (IQR) | 0.90 (0.70–1.10) | 0.80 (0.60–1.10) | 0.90 (0.70–1.10) | 0.074 | 0.80 (0.60–1.10) | 0.80 (0.60–1.10) | 0.80 (0.60–1.10) | 0.836 |
Lymphadenectomy, n (%) |  |  |  | < 0.001 |  |  |  | 1 |
 Yes | 326 (93.9) | 48 (78.7) | 278 (97.2) |  | 92 (93.9) | 46 (93.9) | 46 (93.9) |  |
 No | 21 (6.1) | 13 (21.3) | 8 (2.8) |  | 6 (6.1) | 3 (6.1) | 3 (6.1) |  |
Nodule location, n (%) | Â | Â | Â | 0.529 | Â | Â | Â | 0.840 |
 Right lung | 189 (54.5) | 31 (50.8) | 158 (55.2) |  | 49 (50.0) | 24 (49.0) | 25 (51.0) |  |
 Left lung | 158 (45.5) | 30 (49.2) | 128 (44.8) |  | 49 (50.0) | 25 (51.0) | 24 (49.0) |  |
Number of chest tubes, n (%) | Â | Â | Â | 1 | Â | Â | Â | NA |
 One tube | 346 (99.7) | 61 (100.0) | 285 (99.7) |  | 98 (100.0) | 49 (100.0) | 49 (100.0) |  |
 Two tubes | 1 (0.3) | 0 (0.0) | 1 (0.3) |  | NA | NA | NA |  |
Nodule histology, n (%) | Â | Â | Â | 1 | Â | Â | Â | NA |
 Adenocarcinoma | 346 (99.7) | 61 (100.0) | 285 (99.7) |  | 98 (100.0) | 49 (100.0) | 49 (100.0) |  |
 Non-adenocarcinoma | 1 (0.3) | 0 (0.0) | 1 (0.3) |  | NA | NA | NA |  |
Nodule pathological stage, n (%) | Â | Â | Â | 0.713 | Â | Â | Â | 0.694 |
 0 | 8 (2.3) | 1 (1.6) | 7 (2.4) |  | 3 (3.1) | 1 (2.0) | 2 (4.1) |  |
 I A1 | 253 (72.9) | 44 (72.1) | 209 (73.1) |  | 72 (73.5) | 36 (73.5) | 36 (73.5) |  |
 I A2 | 86 (24.8) | 16 (26.2) | 70 (24.5) |  | 23 (23.5) | 12 (24.5) | 11 (22.4) |  |