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Table 1 Characteristics of colorectal cancer case and control subjects

From: Association of MUTYH Gln324His and APEX1 Asp148Glu with colorectal cancer and smoking in a Japanese population

Item

Patients

Controls

P-value

 

n

%

n

%

 

Number

68

 

121

  

Gender

     

   males

37

54.4

74

61.2

0.872a

   females

26

38.2

47

38.8

 

   unknown

5

7.4

0

0.0

 

Age

     

   ~64

21

30.9

50

41.3

 

   65~69

13

19.1

29

24.0

 

   70~74

13

19.1

20

16.5

 

   75~

16

23.5

22

18.2

 

   unknown

5

7.4

0

0.0

 

   Mean ± S.D.

67.3 ± 10.9

 

67.4 ± 6.7

 

0.923b

Smoking status (Pack-years)

     

   non-smokers (Pack-years = 0)

36

52.9

55

45.5

0.253a

   smokers (Pack-years > 0)

26

38.2

60

49.6

 

   unknown

6

8.8

6

5.0

 

Subsites

     

   colon

40

58.8

   

   rectum

23

33.8

   

   unknown

5

7.4

   
  1. a: X2 analysis
  2. b: Student's T-test