Table 1 Characteristics of included patients

Age, years (median)

65

72

<0.01

66

66

0.91

Age groups

<0.01

0.86

 <50

3057 (12.18)

2770 (6.13)

626 (12.23)

608 (11.88)

 50–69

12,296 (49.00)

16,350 (36.21)

2428 (47.44)

2438 (47.64)

 ≥70

9741 (38.82)

26,036 (57.66)

2064 (40.33)

2072 (40.48)

Sex

<0.01

0.74

 Male

13,451 (53.60)

20,708 (45.86)

2720 (53.15)

2738 (53.50)

 Female

11,634 (46.36)

24,448 (54.14)

2398 (46.85)

2380 (46.50)

Race

<0.01

0.29

 White

19,297 (76.90)

36,705 (81.28)

3995 (78.06)

4041 (78.96)

 Black

2934 (11.69)

5382 (11.92)

591 (11.55)

586 (11.45)

 Others

2756 (10.98)

2935 (6.50)

518 (10.12)

484 (9.45)

 Unknown

107 (0.43)

134 (0.30)

14 (0.27)

7 (0.14)

Grade

<0.01

0.66

 I

2329 (9.28)

3858 (8.54)

506 (9.89)

525 (10.26)

 II

19,469 (77.58)

31,131 (68.94)

3882 (75.85)

3892 (76.05)

 III

2802 (11.17)

8288 (18.35)

643 (12.56)

627 (12.25)

 IV

494 (1.97)

1879 (4.16)

87 (1.70)

74 (1.44)

T

<0.01

0.73

 T1

4402 (17.54)

5879 (13.02)

912 (17.82)

895 (17.49)

 T2

4019 (16.02)

7938 (17.58)

843 (16.47)

855 (16.71)

 T3

13,407 (53.43)

25,277 (55.98)

2765 (54.03)

2801 (54.73)

 T4

3266 (13.02)

6062 (13.42)

598 (11.68)

567 (11.07)

N

<0.01

0.54

 N0

15,479 (61.68)

29,242 (64.76)

3184 (62.21)

3226 (63.03)

 N1

6684 (26.64)

10,350 (22.92)

1336 (26.10)

1327 (25.93)

 N2

2931 (11.68)

5564 (12.32)

598 (11.69)

565 (11.04)

Stage

<0.01

0.85

 I

6938 (27.65)

11,912 (26.38)

1458 (28.49)

1469 (28.70)

 II

8541 (34.04)

17,330 (38.38)

1726 (33.72)

1757 (34.33)

 III

9615 (38.32)

15,914 (35.24)

1934 (37.79)

1892 (36.97)