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Table 1 The basic characteristic of the control (n = 71) and case groups (n = 142)

From: Carbohydrate quality indices and colorectal cancer risk: a case-control study

Variables

Cases (71)

Controls (142)

P-value

Age (year) 1

58.2 ± 10.4

57.7 ± 10.4

0.746

Energy (kcal/day) 1

2262.3 ± 450.1

2255.2 ± 341.2

0.908

Carbohydrate (g/day) 1

347.5 ± 89.6

354.8 ± 71.8

0.552

Protein (g/day) 1

79.1 ± 17.2

83.8 ± 14.3

0.048

Fat (g/day) 1

65.8 ± 8.1

60.5 ± 8.4

<0.001

Fiber (g/day) 1

18.9 ± 2.3

20.4 ± 3.1

<0.001

Glycemic index 2

63.6 (5.9)

61.7 (6.6)

0.001

Insulin index 2

44.0 (17.4)

41.7 (14.7)

0.087

CQI total score 2

11.0 (4.0)

13.0 (3.0)

0.177

Total LCDS2

34.0 (22.0)

36.0 (13.2)

<0.001

BMI (kg/m2) 1

27.6 ± 4.2

26.6 ± 4.2

0.362

Income (dollar) 2

393.0 (253.0)

402.0 (302.0)

0.206

Physical activity (MET-h/day) 1

36.8 ± 3.6

36.7 ± 4.8

0.932

History of CRC, % 3

  

0.017

 Yes

7 (9.9)

3 (2.1)

 

 No

64 (90.1)

139 (97.9)

 

Smoking, % 3

  

0.164

 Never

57 (80.2)

101 (70.1)

 

 Former

8 (11.3)

15 (10.6)

 

 Current

6 (8.5)

26 (18.3)

 

Ibuprofen, % 3

   

 Yes

5 (7.0)

22 (15.5)

 

 No

66 (93.0)

120 (84.5)

 

 No

70 (98.6)

128 (90.1)

 

Acetaminophen, % 3

  

0.004

 Yes

4 (5.6)

28 (19.7)

 

 No

67 (94.4)

114 (80.3)

 

Taking vitamin and mineral supplements, % 3

  

0.015

 Yes

8 (11.3)

35 (24.6)

 

 No

73 (88.7)

107 (75.4)

 
  1. MET: metabolic equivalent of task, CQI: carbohydrate quality index, LCDS: low carbohydrate diet score, BMI: body mass index, CRC: colorectal cancer
  2. Values are mean ± SD for continuous and frequency (percentage) for categorical variables
  3. 1 Using independent samples T-test for normal continuous variables.
  4. 2 Using Mann-Whitney U test for abnormal continuous variables.
  5. 3 Using chi-square test for categorical variables.