Table 1 The five-year cumulative incidences of death among elderly patients with colorectal cancer after surgery

Total

19,789

5417

31.405 (31.402–31.408)

Marital status

< 0.001

 Married

10,209 (51.589)

2527 (46.649)

29.014 (29.009–29.02)

 Other

9580 (48.411)

2890 (53.351)

33.948 (33.942–33.954)

Sex

0.152

 Male

9229 (46.637)

2484 (45.856)

31.543 (31.537–31.55)

 Female

10,560 (53.363)

2933 (54.144)

31.307 (31.302–31.313)

Race

0.235

 White

16,030 (81.005)

4361 (80.506)

31.071 (31.067–31.074)

 Not white

3759 (18.995)

1056 (19.494)

32.868 (32.852–32.884)

Tumor site

0.033

 Colon

17,774 (89.818)

4901 (90.474)

31.548 (31.544–31.551)

 Rectum

2015 (10.182)

516 (9.526)

30.108 (30.08–30.137)

Size, cm

< 0.001

 ≤ 5

12,050 (60.892)

2804 (51.763)

27.08 (27.076–27.085)

 > 5

7739 (39.108)

2613 (48.237)

38.183 (38.175–38.191)

Pathological grade

< 0.001

 I/II

15,138 (76.497)

3526 (65.091)

27.413 (27.41–27.417)

 III/IV

4651 (23.503)

1891 (34.909)

44.374 (44.361–44.387)

AJCC stage

< 0.001

 I

3130 (15.817)

159 (2.935)

5.828 (5.823–5.833)

 II

7175 (36.258)

979 (18.073)

15.923 (15.918–15.928)

 III

6529 (32.993)

2053 (37.899)

37.113 (37.103–37.123)

 IV

2955 (14.933)

2226 (41.093)

83.002 (82.988–83.016)

AJCC T stage

< 0.001

 T1

884 (4.467)

47 (0.868)

6.5 (6.48–6.521)

 T2

2875 (14.528)

228 (4.209)

9.475 (9.467–9.483)

 T3

12,018 (60.731)

2981 (55.03)

28.747 (28.743–28.752)

 T4

4012 (20.274)

2161 (39.893)

60.796 (60.78–60.812)

AJCC N stage

< 0.001

 N0

10,780 (54.475)

1444 (26.657)

15.488 (15.485–15.491)

 N1

5425 (27.414)

1864 (34.41)

40.294 (40.281–40.306)

 N2

3584 (18.111)

2109 (38.933)

65.79 (65.773–65.807)

AJCC M stage

< 0.001

 M0

16,834 (85.067)

3191 (58.907)

22.228 (22.225–22.231)

 M1

2955 (14.933)

2226 (41.093)

83.002 (82.988–83.016)

CEA

< 0.001

 Elevated

9001 (45.485)

3526 (65.091)

44.51 (44.502–44.517)

 Normal

10,788 (54.515)

1891 (34.909)

20.477 (20.473–20.481)

Perineural invasion

< 0.001

 Positive

2621 (13.245)

1345 (24.829)

59.2 (59.174–59.227)

 Negative

17,168 (86.755)

4072 (75.171)

27.284 (27.281–27.288)

Chemotherapy

< 0.001

 Yes

5816 (29.390)

2019 (37.272)

42.267 (42.255–42.28)

 No/unknown

13,973 (70.61)

3398 (62.728)

26.959 (26.955–26.962)