Table 9 Analysis of the death of 2091 esophageal cancer combined with other cancers patients over 80 years old.

From: Study on the survival prognosis of over 80 years old patients of esophageal cancer with other cancers-based on SEER data analysis

Sequence number

Reasons of deaths

Esophageal cancer

Other cancers

Non-tumour deaths

Accidents or other reasons

Total

N

%

N

%

N

%

N

%

N

%

1st of 2 or more primaries

141

62.1

39

17.0

35

15.4

12

5.3

227

100

2nd of 2 or more primaries

1099

76.9

92

6.4

175

12.2

63

4.4

1429

100

3rd of 3 or more primaries

243

72.3

33

9.8

48

14.3

12

3.6

336

100

≥ 4th or more primaries

75

75.8

9

9.1

10

10.1

5

5.1

99

100

Total

1558

74.5

173

8.3

268

12.8

92

4.4

2091

 

χ2

33.836

         

P

0.000