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Table 3 Primary tumor location and degree of differentiation of patients identified by chart review

From: Validation of algorithms to identify colorectal cancer patients from administrative claims data of a Japanese hospital

Characteristics

Algorithm 1: Colorectal cancer codes

 

Algorithm 2: Site-specific colorectal cancer codes

Samples

(n = 249)

 

Samples

(n = 100)

Primary tumor location, n (%)

     

 Left-sided colon

10

(4.02)

 

6

(6.00)

 Right-sided colon

37

(14.86)

 

28

(28.00)

 Transverse colon

23

(9.24)

 

10

(10.00)

 Rectum

137

(55.02)

 

50

(50.00)

 Unknown

42

(16.87)

 

6

(6.00)

Degree of differentiation, n (%)

     

 Poorly differentiated

6

(2.41)

 

3

(3.00)

 Moderately differentiated

89

(35.74)

 

37

(37.00)

 Well-differentiated

57

(22.89)

 

27

(27.00)

 Unknown

97

(38.96)

 

33

(33.00)

Cancer stage, n (%)

     

 0

12

(4.82)

 

4

(4.00)

 I

44

(17.67)

 

18

(18.00)

 II

37

(14.86)

 

21

(21.00)

 III

32

(12.85)

 

12

(12.00)

 IV

53

(21.29)

 

25

(25.00)

 Unknown

71

(28.51)

 

20

(20.00)