| | Variables | All patients N = (87,045) | Training cohort N = (60,933) | Validation cohort N = (26,112) | | N (%) | N (%) | N (%) |
| | Sex | | Female | 42,199 (48.5) | 29,550 (48.5) | 12,649 (48.4) | | Male | 44,846 (51.5) | 31,383 (51.5) | 13,463 (51.6) |
| | Age(years) | | <60 | 15,510 (17.8) | 10,813 (17.7) | 4,697 (18.0) | | ≥60 | 71,535 (82.2) | 50,120 (82.3) | 21,415 (82.0) |
| | Race | | Black | 9,583 (11.0) | 6,758 (11.1) | 2,825 (10.8) | | White | 71,259 (81.9) | 49,896 (81.9) | 21,363 (81.8) | | Others | 6,203 (7.1) | 4,279 (7.0) | 1,924 (7.4) |
| | Marital | | Married | 46,595 (53.5) | 32,584 (53.5) | 14,011 (53.7) | | Divorced | 10,766 (12.4) | 7,584 (12.4) | 3,182 (12.1) | | Single | 11,420 (13.1) | 7,946 (13.0) | 3,474 (13.3) | | Widowed | 14,727 (16.9) | 10,330 (17.0) | 4,397 (16.8) | | Unknown | 3,537 (4.1) | 2,489 (4.1) | 1,048 (4.0) |
| | Histology | | AC | 49,530 (56.9) | 34,766 (57.1) | 14,764 (56.5) | | BAC | 5,366 (6.1) | 3,736 (6.1) | 1,630 (6.2) | | LCC | 1,710 (2.0) | 1,202 (2.0) | 508 (2.0) | | SC | 30,439 (35.0) | 21,229 (34.8) | 9,210 (35.3) |
| | Grade | | I | 11,539 (13.3) | 8,065 (13.2) | 3,474 (13.3) | | II | 35,660 (41.0) | 24,918 (40.9) | 10,742 (41.1) | | III | 38,508 (44.2) | 26,979 (44.3) | 11,529 (44.2) | | IV | 1,338 (1.5) | 971 (1.6) | 367 (1.4) |
| | T stage | | T1 | 29,605 (34.0) | 20,790 (34.1) | 8,815 (33.76) | | T2 | 25,870 (29.7) | 18,047 (29.6) | 7,823 (29.96) | | T3 | 16,523 (19.0) | 11,607 (19.1) | 4,916 (18.83) | | T4 | 14,972 (17.2) | 10,432 (17.1) | 4,540 (17.39) |
| | N stage | | N0 | 50,120 (57.6) | 35,040 (57.5) | 15,080 (57.8) | | N1 | 8,122 (9.4) | 5,736 (9.4) | 2,476 (9.5) | | N2 | 21,968 (25.2) | 15,446 (25.4) | 6,522 (25.0) | | N3 | 6,745 (7.8) | 4,711 (7.7) | 2,034 (7.7) |
| | M stage | | M0 | 63,034 (72.4) | 44,062 (72.3) | 18,972 (72.7) | | M1 | 24,011 (27.6) | 16,871 (27.7) | 7,140 (27.3) |
| | Pleural | | PLX | 45,747 (52.6) | 31,976 (52.5) | 13,771 (52.7) | | | 34,690 (39.9) | 24,389 (40.0) | 10,301 (39.4) | | | 2,977 (3.4) | 2,064 (3.4) | 913 (3.5) | | | 2,529 (2.9) | 1,763 (2.9) | 766 (3.0) | | | 1,102 (1.3) | 741 (1.2) | 361 (1.4) |
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