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Table 1 Distribution of 82 gastric cancer cases and 95 controls according to selected variablesa, b [8, 38]

From: Validation of Dietary Antioxidant Index (DAI) and investigating the relationship between DAI and the odds of gastric cancer

Characteristics

Mean ± SD or N (%)

p value

Controls (n = 95)

Cases (n = 82)

Age (years)

48.33 ± 10.74

51.36 ± 11.81

0.07

Body Mass Index (BMI, kg/m2)

24.96 ± 2.71

26.36 ± 5.12

0.02

Dietary antioxidant Index (DAI)

0.17 ± 1.18

− 0.21 ± 0.68

< 0.01

TAC (mmol/l)

1.91 ± 1.27

1.16 ± 1.26

< 0.01

MDA (μmol/l)

3.01 ± 1.68

3.72 ± 2.19

< 0.01

Sex

  

0.98

 Females

52 (54.74)

45 (54.88)

 

 Males

43 (45.26)

37 (45.12)

 

Education

  

0.24

 Diploma or less

67 (70.53)

51 (62.20)

 

 Higher than diploma

28 (29.47)

31 (37.80)

 

Smoking

  

0.82

 Never smoker

80 (84.21)

68 (82.93)

 

 Ever smoker

15 (15.79)

14 (17.07)

 

Alcohol

  

0.41

 Non drinker

86 (90.53)

71 (86.59)

 

 Drinker

9 (9.47)

11 (13.41)

 

H. pylori infection

  

 < 0.01

 Negative

46 (48.42)

21 (25.61)

 

 Positive

49 (51.57)

61 (74.39)

 

Regular physical activity

  

0.03

 Yes

30 (31.58)

14 (17.07)

 

 No

65 (68.42)

68 (82.93)

 

Aspirin/NSAID use

  

0.83

 No

86 (90.53)

75 (91.46)

 

 Yes

9 (9.47)

7 (8.54)

 

Cancer history

  

0.41

 Yes

11 (11.58)

13 (15.85)

 

 No

84 (88.42)

69 (84.15)

 
  1. TAC total antioxidant capacity, mmol/l millimoles per liter, MDA malondialdehyde, μmol/l micromoles per liter
  2. aComparison of mean of case and control groups in case of a normal distribution of variables by the t-test and abnormal distribution of variables by the Mann–Whitney test
  3. bChi-square was used for categorical variables