Table 1 Baseline patient characteristics before and after propensity score matching
Characteristic | Surgical procedure unmatching | Surgical procedure matching | ||||||
|---|---|---|---|---|---|---|---|---|
Total (N = 5783) | Lobectomy (N = 5531) | Segmentectomy (N = 252) | Pb value | Total (N = 755) | Lobectomy (N = 503) | Segmentectomy (N = 252) | P value | |
Age (years), n (%) | 0.001 | 0.472 | ||||||
≤ 60 | 1351 (23.4) | 1308 (23.6) | 43 (17.1) | 129 (17.1) | 86 (17.1) | 43 (17.1) | ||
61–70 | 2011 (34.8) | 1928 (34.9) | 83 (32.9) | 238 (31.5) | 155 (30.8) | 83 (32.9) | ||
71–80 | 1945 (33.6) | 1855 (33.5) | 90 (35.7) | 295 (39.1) | 205 (40.8) | 90 (35.7) | ||
≥ 81 | 476 (8.2) | 440 (8.0) | 36 (14.3) | 93 (12.3) | 57 (11.3) | 36 (14.3) | ||
Mean ± SD | 67.47 ± 10.25 | 67.37 ± 10.24 | 69.75 ± 10.32 | < 0.001 | 69.67 ± 9.96 | 69.63 ± 9.78 | 69.75 ± 10.32 | 0.880 |
Sex, n (%) | 0.743 | 0.316 | ||||||
Female | 3225 (55.8) | 3087 (55.8) | 138 (54.8) | 394 (52.2) | 256 (50.9) | 138 (54.8) | ||
Male | 2558 (44.2) | 2444 (44.2) | 114 (45.2) | 361 (47.8) | 247 (49.1) | 114 (45.2) | ||
Race, n (%) | 0.605 | 0.944 | ||||||
White | 4871 (84.2) | 4664 (84.3) | 207 (82.1) | 625 (82.8) | 418 (83.1) | 207 (82.1) | ||
Black | 463 (8.0) | 439 (7.9) | 24 (9.5) | 70 (9.3) | 46 (9.1) | 24 (9.5) | ||
Others | 449 (7.8) | 428 (7.7) | 21 (8.3) | 60 (7.9) | 39 (7.8) | 21 (8.3) | ||
Marital status, n (%) | 0.397 | 0.859 | ||||||
Noa | 3430 (59.3) | 3237 (59.4) | 143 (56.7) | 425 (56.3) | 282 (56.1) | 143 (56.7) | ||
Yes | 2353 (40.7) | 2244 (40.6) | 109 (43.3) | 330 (43.7) | 221 (43.9) | 109 (43.3) | ||
Laterality, n (%) | 0.005 | 0.817 | ||||||
Left | 2418 (41.8) | 2291 (41.4) | 127 (50.4) | 376 (49.8) | 249 (49.5) | 127 (50.4) | ||
Right | 3365 (58.2) | 3240 (58.6) | 125 (49.6) | 379 (50.2) | 254 (50.5) | 125 (49.6) | ||
Primary Site, n (%) | 0.063 | 0.659 | ||||||
Upper | 3524 (60.9) | 3380 (61.6) | 144 (57.1) | 428 (56.7) | 284 (56.5) | 144 (57.1) | ||
Middle | 305 (5.3) | 297 (5.4) | 8 (3.2) | 31 (4.1) | 23 (4.6) | 8 (3.2) | ||
Lower | 1954 (33.8) | 1854 (33.5) | 100 (39.7) | 296 (39.2) | 196 (39.0) | 100 (39.7) | ||
Histopathology, n (%) | 0.111 | 0.290 | ||||||
ADC | 2450 (42.4) | 2355 (42.6) | 95 (37.7) | 282 (37.4) | 187 (37.2) | 95 (37.7) | ||
SCC | 1234 (21.3) | 1184 (21.4) | 50 (19.8) | 174 (23.0) | 124 (24.7) | 50 (19.8) | ||
Others | 2099 (36.3) | 1992 (36.0) | 107 (42.5) | 299 (39.6) | 192 (38.2) | 107 (42.5) | ||
Grade, n (%) | 0.227 | 0.917 | ||||||
I | 1357 (23.5) | 1309 (23.7) | 48 (19.0) | 140 (18.5) | 92 (18.3) | 48 (19.0) | ||
II | 2649 (45.8) | 2529 (45.7) | 120 (47.6) | 356 (47.2) | 236 (46.9) | 120 (47.6) | ||
III–IV | 1777 (30.7) | 1693 (30.6) | 84 (33.4) | 259 (34.3) | 175 (34.8) | 84 (33.3) | ||
OS, n (%) | 0.001 | 0.739 | ||||||
Alive | 3754 (64.9) | 3616 (65.4) | 138 (54.8) | 407 (53.9) | 269 (53.5) | 138 (54.8) | ||
Dead | 2029 (35.1) | 1915 (34.6) | 114 (45.2) | 348 (46.1) | 234 (46.5) | 114 (45.2) | ||
LCSS, n (%) | 0.020 | 0.755 | ||||||
Alive | 4706 (81.4) | 4515 (81.6) | 191 (75.8) | 567 (75.1) | 376 (74.8) | 191 (75.8) | ||
Dead | 1077 (18.6) | 1016 (18.4) | 61 (24.2) | 188 (24.9) | 127 (25.2) | 61 (24.2) | ||