Retrospective Cohort Study
Copyright ©The Author(s) 2022.
World J Clin Cases. Oct 26, 2022; 10(30): 10882-10895
Published online Oct 26, 2022. doi: 10.12998/wjcc.v10.i30.10882
Table 1 Baseline characteristics of the overall, training, and validation cohorts
Characteristic
Overall cohort (n = 4475)
Training cohort (n = 3135)
Validation cohort (n = 1340)
P value
Age, yr0.839
Median (range)67 (23-96)67 (23-96)66 (32-93)
< 651930 (43.1)1349 (43.0)581 (43.4)
≥ 652545 (56.9)1786 (57.0)759 (56.6)
Marital status0.413
Married2463 (55.0)1713 (54.6)750 (56.0)
Unmarried2012 (45.0)1422 (45.4)590 (44.0)
Sex0.808
Female1938 (43.3)1354 (43.2)584 (43.6)
Male2537 (56.7)1781 (56.8)756 (56.4)
Race0.263
Black566 (12.6)413 (13.2)153 (11.4)
White3517 (78.6)2451 (78.2)1066 (79.6)
Other1392 (8.8)271 (8.6)121 (9.0)
Primary site0.922
UL2452 (54.8)1725 (55.0)727 (54.3)
ML198 (4.4)133 (4.2)65 (4.9)
LL1219 (27.2)853 (27.2)366 (27.3)
MB240 (5.4)167 (5.3)73 (5.4)
Other366 (8.2)257 (8.2)109 (8.1)
Histological type0.786
ADC2967 (66.3)2085 (66.5)882 (65.8)
SCC1169 (26.1)810 (25.8)359 (26.8)
Other NSCLCs339 (7.6)240 (7.7)99 (7.4)
T stage0.910
T1507 (11.3)362 (11.5)145 (10.8)
T21197 (26.7)839 (26.8)358 (26.7)
T31204 (26.9)839 (26.8)365 (27.2)
T41567 (35.0)1095 (34.9)472 (35.2)
N stage0.170
N0831 (18.6)596 (19.0)235 (17.5)
N1358 (8.0)239 (7.6)119 (8.9)
N22312 (51.7)1601 (51.1)711 (53.1)
N3974 (21.8)699 (22.3)275 (20.5)
Metastatic pattern0.166
Liver only1598 (35.7)1117 (35.6)481 (35.9)
Liver + bone1701 (38.0)1166 (37.2)535 (39.9)
Liver + brain415 (9.3)301 (9.6)114 (8.5)
Liver + bone + brain761 (17.0)551 (17.6)210 (15.7)
Radiotherapy0.497
Yes1871 (41.8)1321 (42.1)550 (41.0)
No/unknown2604 (58.2)1814 (57.9)790 (59.0)
Chemotherapy0.287
Yes2417 (54.0)1677 (53.5)740 (55.2)
No/unknown2058 (46.0)1458 (46.5)600 (44.8)